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This release note provides information about the latest release of OS MasterMap (OSMM) Topography Layer, released to customers on 23 September 2024.
The following table contains product counts for this release of OSMM Topography Layer data. The dates shown are extraction dates, not release dates.
Total Feature Count
509 529 397
510 067 246
Count of Topo Area
127 455 397
127 597 512
Count of Topo Line
351 126 174
351 522 233
Count of Topo Point
4 388 827
4 390 130
Count of Topo Bline
530 617
527 717
Count of Topo CartoSym
3 788 942
3 785 178
Count of Topo CartoTxt
22 239 440
22 244 476
Total Count of Deletes
636 733
562 062
Count of Topo Area deletions
129 723
112 920
Count of Topo Line deletions
478 982
420 657
Count of Topo Point deletions
2 227
2 285
Count of Topo Bline deletions
1 374
3 344
Count of Topo CartoSym deletions
4 265
7 463
Count of Topo CartoTxt deletions
20 162
15 393
Total Count of Inserts
1 283 294
1 099 911
Count of Topo Area inserts
295 954
255 035
Count of Topo Line inserts
949 436
816 716
Count of Topo Point inserts
3 017
3 588
Count of Topo Bline inserts
664
444
Count of Topo CartoSym inserts
3 336
3 699
Count of Topo CartoTxt inserts
30 887
20 429
Total Count of Modifications
1 213 405
1 095 471
Count of Topo Area Modifications
611 739
550 327
Count of Topo Line Modifications
585 817
524 077
Count of Topo Point Modifications
256
262
Count of Topo Bline Modifications
1 485
7 426
Count of Topo CartoSym Modifications
51
18
Count of Topo CartoTxt Modifications
14 057
13 361
COU Size (bytes)
539 082 200
479 107 436
Numerous TOIDs (Topographic Identifiers) have changed since the last refresh resulting in a visual difference in the data. The list below shows a sample of changed TOIDs and their locations that you can use as 'lookup samples' to validate that your latest supply has updated correctly:
osgb1000000293853171
276700.84, 892218.39
osgb5000005126441008
399800.555, 403814.06
osgb5000005194435102
570821, 186280
osgb1000002574125339
311521.93, 529487.37
osgb5000005216534775
345159.916, 464018.662
osgb5000005307345670
520838.36, 249433.06
In this release 23 errors were detected, of which, 2 have existed since the previous refresh. These are all considered to be minor errors and there are no major errors present.
We aim to have all errors resolved prior to the next release as part of ongoing quality improvements.
The next release of OS MasterMap Topography Layer is scheduled for 04 November 2024.
The land cover specification for rural geographies has been refined. The Mountain and Moorland refinement was completed in 2022.
The rural geography updates began capture in May 2022. The initial updates fed through to the July 2022 release of OSMM Topography Layer, with the multi class land cover polygons completed in December 2022. The single class land cover polygons will continue to feed through to product from April 2023.
The following two tables articulate this specification refinement:
Geographic area
Minimum area size for land cover
Minimum width
Urban
0.1hectares (ha) (1 000m²)
5m
Rural
0.1hectares (ha) (1 000m²)
10m
Mountain and moorland
1.0hectares (ha) (10 000m²)
10m
Geographic area
Minimum area size for land cover
Minimum width
Urban
0.1hectares (ha) (1 000m²)
5m
Rural
0.1hectares (ha) (1 000m²)
5m*
Mountain and moorland
0.1hectares (ha) (1 000m²)*
5m*
The asterisk symbol (*) shows which criteria have been refined.
The land cover specification refinement means that the rural land cover data within OSMM Topography Layer will become more granular, producing a more detailed view made up of smaller more numerous polygons. This provides users with more accurate data that meets each individual’s specific requirements. These changes are purely refinements and do not change the data attribution.
Annex A shows three examples of how the rural land cover refinement is being translated into OSMM Topography Layer.
Release notes listed here provide information about the current release of the OS MasterMap Topography Layer product and the previous nine releases.
This release note provides information about the December 2024 release of OS MasterMap (OSMM) Topography Layer.
This release note provides information about the November 2024 release of OS MasterMap (OSMM) Topography Layer.
This release note provides information about the September 2024 release of OS MasterMap (OSMM) Topography Layer.
This release note provides information about the August 2024 release of OS MasterMap (OSMM) Topography Layer.
This release note provides information about the June 2024 release of OS MasterMap (OSMM) Topography Layer.
This release note provides information about the May 2024 release of OS MasterMap (OSMM) Topography Layer.
This release note provides information about the April 2024 release of OS MasterMap (OSMM) Topography Layer.
This release note provides information about the February 2024 release of OS MasterMap (OSMM) Topography Layer.
This release note provides information about the January 2024 release of OS MasterMap (OSMM) Topography Layer.
This release note provides information about the November 2023 release of OS MasterMap (OSMM) Topography Layer.
This release note provides information about the latest release of OS MasterMap (OSMM) Topography Layer, released to customers on 04 November 2024.
The following table contains product counts for this release of OSMM Topography Layer data. The dates shown are extraction dates, not release dates.
Total Feature Count
510 067 246
510 670 422
Count of Topo Area
127 597 512
127 758 433
Count of Topo Line
351 522 233
351 963 619
Count of Topo Point
4 390 130
4 391 190
Count of Topo Bline
527 717
524 557
Count of Topo CartoSym
3 785 178
3 780 899
Count of Topo CartoTxt
22 244 476
22 251 724
Total Count of Deletes
562 062
666 186
Count of Topo Area deletions
112 920
138 007
Count of Topo Line deletions
420 657
496 634
Count of Topo Point deletions
2 285
1 941
Count of Topo Bline deletions
3 344
3 858
Count of Topo CartoSym deletions
7 463
7 484
Count of Topo CartoTxt deletions
15 393
18 262
Total Count of Inserts
1 099 911
1 269 362
Count of Topo Area inserts
255 035
298 928
Count of Topo Line inserts
816 716
938 020
Count of Topo Point inserts
3 588
3 001
Count of Topo Bline inserts
444
698
Count of Topo CartoSym inserts
3 699
3 205
Count of Topo CartoTxt inserts
20 429
25 510
Total Count of Modifications
1 095 471
1 257 214
Count of Topo Area Modifications
550 327
643 905
Count of Topo Line Modifications
524 077
597 362
Count of Topo Point Modifications
262
275
Count of Topo Bline Modifications
7 426
2 456
Count of Topo CartoSym Modifications
18
53
Count of Topo CartoTxt Modifications
13 361
13 163
COU Size (bytes)
479 107 436
543 866 589
Numerous TOIDs (Topographic Identifiers) have changed since the last refresh, resulting in a visual difference in the data. The list below shows a sample of changed TOIDs and their locations that you can use as 'lookup samples' to validate that your latest supply has updated correctly:
osgb5000005336454207
236466.509, 628118.225
osgb5000005196539006
329800.731, 477434.786
osgb5000005283135322
507039.113, 375158.152
osgb1000000381134706
128427.853, 919654.391
osgb1000000223021238
333046.984, 476824.072
osgb1000002503313612
518198.08, 452626.12
In this release 7 errors were detected, of which, 2 have existed since the previous refresh. These are all considered to be minor errors and there are no major errors present.
We aim to have all errors resolved prior to the next release as part of ongoing quality improvements.
The next release of OS MasterMap Topography Layer is scheduled for 16 December 2024.
The land cover specification for rural geographies has been refined. The Mountain and Moorland refinement was completed in 2022.
The rural geography updates began capture in May 2022. The initial updates fed through to the July 2022 release of OSMM Topography Layer, with the multi class land cover polygons completed in December 2022. The single class land cover polygons will continue to feed through to product from April 2023.
The following two tables articulate this specification refinement:
Urban
0.1hectares (ha) (1 000m²)
5m
Rural
0.1hectares (ha) (1 000m²)
10m
Mountain and moorland
1.0hectares (ha) (10 000m²)
10m
Urban
0.1hectares (ha) (1 000m²)
5m
Rural
0.1hectares (ha) (1 000m²)
5m*
Mountain and moorland
0.1hectares (ha) (1 000m²)*
5m*
The asterisk symbol (*) shows which criteria have been refined.
The land cover specification refinement means that the rural land cover data within OSMM Topography Layer will become more granular, producing a more detailed view made up of smaller more numerous polygons. This provides users with more accurate data that meets each individual’s specific requirements. These changes are purely refinements and do not change the data attribution.
Annex A shows three examples of how the rural land cover refinement is being translated into OSMM Topography Layer.
Below are three real-world examples of how the rural land cover specification refinement has affected the data within OSMM Topography Layer. The examples showcase three areas in southern Scotland where the specification refinement has broken up one land polygon within the Topographic Area Feature Type into smaller, separate polygons.
OSMM Topography Layer (July 2022): osgb1000000316775097
OSMM Topography Layer (August 2022): osgb5000005297485451, osgb5000005297485455, osgb5000005297485456
Source imagery of example area one for comparative purposes:
Data before the rural land cover specification refinement update (OSMM Topography Layer – July 2022):
Data after the rural land cover specification refinement update (OSMM Topography Layer – August 2022):
OSMM Topography Layer (July 2022): osgb1000000318639911
OSMM Topography Layer (August 2022): osgb1000000318639911, osgb5000005298080383, osgb5000005298080465
Source imagery of example area two for comparative purposes:
Data before the rural land cover specification refinement update (OSMM Topography Layer – August 2022):
Data after the rural land cover specification refinement update (OSMM Topography Layer – October 2022):
OSMM Topography Layer (July 2022): osgb1000000319079420
OSMM Topography Layer (August 2022): osgb1000000319079420, osgb5000005298106224
Source imagery of example area three for comparative purposes:
Data before the rural land cover specification refinement update (OSMM Topography Layer – August 2022):
Data after the rural land cover specification refinement update (OSMM Topography Layer – October 2022):
This release note provides information about the latest release of OS MasterMap (OSMM) Topography Layer, released to customers on 12 August 2024.
The following table contains product counts for this release of OSMM Topography Layer data. The dates shown are extraction dates, not release dates.
Total Feature Count
508 882 836
509 529 397
Count of Topo Area
127 289 166
127 455 397
Count of Topo Line
350 655 720
351 126 174
Count of Topo Point
4 388 037
4 388 827
Count of Topo Bline
531 327
530 617
Count of Topo CartoSym
3 789 871
3 788 942
Count of Topo CartoTxt
22 228 715
22 239 440
Total Count of Deletes
602 375
636 733
Count of Topo Area deletions
119 554
129 723
Count of Topo Line deletions
449 655
478 982
Count of Topo Point deletions
2 553
2 227
Count of Topo Bline deletions
1 350
1 374
Count of Topo CartoSymcc deletions
4 460
4 265
Count of Topo CartoTxtcc deletions
24 803
20 162
Total Count of Inserts
1 156 041
1 283 294
Count of Topo Area inserts
262 381
295 954
Count of Topo Line inserts
852 128
949 436
Count of Topo Point inserts
4 869
3 017
Count of Topo Bline inserts
420
664
Count of Topo CartoSym inserts
5 489
3 336
Count of Topo CartoTxt inserts
30 754
30 887
Total Count of Modifications
1 181 874
1 213 405
Count of Topo Area Modifications
601 058
611 739
Count of Topo Line Modifications
563 973
585 817
Count of Topo Point Modifications
220
256
Count of Topo Bline Modifications
2 947
1 485
Count of Topo CartoSym Modifications
46
51
Count of Topo CartoTxt Modifications
13 630
14 057
COU Size (bytes)
507 742 477
539 082 200
Numerous TOIDs (Topographic Identifiers) have changed since the last refresh, resulting in a visual difference in the data. The list below shows a sample of changed TOIDs and their locations that you can use as 'lookup samples' to validate that your latest supply has updated correctly:
osgb5000005333761759
266379.141, 661146.076
osgb1000002102169148
330922.334, 436520.256
osgb1000001792521555
514257.13, 177195.224
osgb1000000390862765
181610.432, 697265.48
osgb1000002031686162
377705.95, 414622.45
osgb5000005127065768
563861.53, 189432.44
In this release 23 errors were detected of which 2 have existed since the previous refresh. These are all considered to be minor errors and there are no major errors present.
We aim to have all errors resolved prior to the next release as part of ongoing quality improvements.
The next release of OS MasterMap Topography Layer is scheduled for 23 September 2024.
The land cover specification for rural geographies has been refined. The Mountain and Moorland refinement was completed in 2022.
The rural geography updates began capture in May 2022. The initial updates fed through to the July 2022 release of OSMM Topography Layer, with the multi class land cover polygons completed in December 2022. The single class land cover polygons will continue to feed through to product from April 2023.
The following two tables articulate this specification refinement:
Urban
0.1hectares (ha) (1 000m²)
5m
Rural
0.1hectares (ha) (1 000m²)
10m
Mountain and moorland
1.0hectares (ha) (10 000m²)
10m
Urban
0.1hectares (ha) (1 000m²)
5m
Rural
0.1hectares (ha) (1 000m²)
5m*
Mountain and moorland
0.1hectares (ha) (1 000m²)*
5m*
The asterisk symbol (*) shows which criteria have been refined.
The land cover specification refinement means that the rural land cover data within OSMM Topography Layer will become more granular, producing a more detailed view made up of smaller more numerous polygons. This provides users with more accurate data that meets each individual’s specific requirements. These changes are purely refinements and do not change the data attribution.
Annex A shows three examples of how the rural land cover refinement is being translated into OSMM Topography Layer.
Below are three real-world examples of how the rural land cover specification refinement has affected the data within OSMM Topography Layer. The examples showcase three areas in southern Scotland where the specification refinement has broken up one land polygon within the Topographic Area Feature Type into smaller, separate polygons.
OSMM Topography Layer (July 2022): osgb1000000316775097
OSMM Topography Layer (August 2022): osgb5000005297485451, osgb5000005297485455, osgb5000005297485456
Source imagery of example area one for comparative purposes:
Data before the rural land cover specification refinement update (OSMM Topography Layer – July 2022):
Data after the rural land cover specification refinement update (OSMM Topography Layer – August 2022):
OSMM Topography Layer (July 2022): osgb1000000318639911
OSMM Topography Layer (August 2022): osgb1000000318639911, osgb5000005298080383, osgb5000005298080465
Source imagery of example area two for comparative purposes:
Data before the rural land cover specification refinement update (OSMM Topography Layer – August 2022):
Data after the rural land cover specification refinement update (OSMM Topography Layer – October 2022):
OSMM Topography Layer (July 2022): osgb1000000319079420
OSMM Topography Layer (August 2022): osgb1000000319079420, osgb5000005298106224
Source imagery of example area three for comparative purposes:
Data before the rural land cover specification refinement update (OSMM Topography Layer – August 2022):
Data after the rural land cover specification refinement update (OSMM Topography Layer – October 2022):
This release note provides information about the latest release of OS MasterMap (OSMM) Topography Layer, released to customers on 24 June 2024.
The following table contains product counts for this release of OSMM Topography Layer data. The dates shown are extraction dates, not release dates.
Total Feature Count
508 329 170
508 882 836
Count of Topo Area
127 146 339
127 289 166
Count of Topo Line
350 253 247
350 655 720
Count of Topo Point
4 385 721
4 388 037
Count of Topo Bline
532 257
531 327
Count of Topo CartoSym
3 788 842
3 789 871
Count of Topo CartoTxt
22 222 764
22 228 715
Total Count of Deletes
387 625
602 375
Count of Topo Area deletions
78 038
119 554
Count of Topo Line deletions
277 326
449 655
Count of Topo Point deletions
3 039
2 553
Count of Topo Bline deletions
533
1 350
Count of Topo CartoSymcc deletions
6 393
4 460
Count of Topo CartoTxtcc deletions
22 296
24 803
Total Count of Inserts
837 247
1 156 041
Count of Topo Area inserts
189 219
262 381
Count of Topo Line inserts
587 842
852 128
Count of Topo Point inserts
13 345
4 869
Count of Topo Bline inserts
218
420
Count of Topo CartoSym inserts
17 235
5 489
Count of Topo CartoTxt inserts
29 388
30 754
Total Count of Modifications
736 646
1 181 874
Count of Topo Area Modifications
369 267
601 058
Count of Topo Line Modifications
353 690
563 973
Count of Topo Point Modifications
231
220
Count of Topo Bline Modifications
2 681
2 947
Count of Topo CartoSym Modifications
44
46
Count of Topo CartoTxt Modifications
10 733
13 630
COU Size (bytes)
333 062 363
507 742 477
Numerous TOIDs (Topographic Identifiers) have changed since the last refresh, resulting in a visual difference in the data. The list below shows a sample of changed TOIDs and their locations that you can use as 'lookup samples' to validate that your latest supply has updated correctly:
osgb1000000828071143
283459.15, 558287.03
osgb1000032166978
420041.3, 420633.65
osgb1000002023902176
570547.2, 321617.6
osgb1000000051338601
400106.45, 867491.455
osgb5000005222007891
334818.55, 415223.62
osgb1000001792732699
516068.135, 172721.936
In this release 5 minor errors were detected, of which 2 have existed since the previous refresh. All errors detected are considered to be minor. We aim to have all 5 errors resolved prior to the next release as part of ongoing quality improvements.
The next release of OS MasterMap Topography Layer is scheduled for 12 August 2024.
The land cover specification for rural geographies has been refined. The Mountain and Moorland refinement was completed in 2022.
The rural geography updates began capture in May 2022. The initial updates fed through to the July 2022 release of OSMM Topography Layer, with the multi class land cover polygons completed in December 2022. The single class land cover polygons will continue to feed through to product from April 2023.
The following two tables articulate this specification refinement:
Geographic area
Minimum area size for land cover
Minimum width
Urban
0.1hectares (ha) (1 000m²)
5m
Rural
0.1hectares (ha) (1 000m²)
10m
Mountain and moorland
1.0hectares (ha) (10 000m²)
10m
Geographic area
Minimum area size for land cover
Minimum width
Urban
0.1hectares (ha) (1 000m²)
5m
Rural
0.1hectares (ha) (1 000m²)
5m*
Mountain and moorland
0.1hectares (ha) (1 000m²)*
5m*
The asterisk symbol (*) shows which criteria have been refined.
The land cover specification refinement means that the rural land cover data within OSMM Topography Layer will become more granular, producing a more detailed view made up of smaller, more numerous polygons. This provides users with more accurate data that meets each individual’s specific requirements. These changes are purely refinements and do not change the data attribution.
Annex A shows three examples of how the rural land cover refinement is being translated into OSMM Topography Layer.
Below are three real-world examples of how the rural land cover specification refinement has affected the data within OSMM Topography Layer. The examples showcase three areas in southern Scotland where the specification refinement has broken up one land polygon within the Topographic Area Feature Type into smaller, separate polygons.
OSMM Topography Layer (July 2022): osgb1000000316775097
OSMM Topography Layer (August 2022): osgb5000005297485451, osgb5000005297485455, osgb5000005297485456
Source imagery of example area one for comparative purposes:
Data before the rural land cover specification refinement update (OSMM Topography Layer – July 2022):
Data after the rural land cover specification refinement update (OSMM Topography Layer – August 2022):
OSMM Topography Layer (July 2022): osgb1000000318639911
OSMM Topography Layer (August 2022): osgb1000000318639911, osgb5000005298080383, osgb5000005298080465
Source imagery of example area two for comparative purposes:
Data before the rural land cover specification refinement update (OSMM Topography Layer – August 2022):
Data after the rural land cover specification refinement update (OSMM Topography Layer – October 2022):
OSMM Topography Layer (July 2022): osgb1000000319079420
OSMM Topography Layer (August 2022): osgb1000000319079420, osgb5000005298106224
Source imagery of example area three for comparative purposes:
Data before the rural land cover specification refinement update (OSMM Topography Layer – August 2022):
Data after the rural land cover specification refinement update (OSMM Topography Layer – October 2022):
This release note provides information about the latest release of OS MasterMap (OSMM) Topography Layer, released to customers on 13 May 2024.
The following table contains product counts for this release of OSMM Topography Layer data. The dates shown are extraction dates, not release dates.
Total Feature Count
507 879 548
508 329 170
Count of Topo Area
127 035 158
127 146 339
Count of Topo Line
349 942 731
350 253 247
Count of Topo Point
4 375 415
4 385 721
Count of Topo Bline
532 572
532 257
Count of Topo CartoSym
3 778 000
3 788 842
Count of Topo CartoTxt
22 215 672
22 222 764
Total Count of Deletes
363 259
387 625
Count of Topo Area deletions
75 296
78 038
Count of Topo Line deletions
253 444
277 326
Count of Topo Point deletions
4 059
3 039
Count of Topo Bline deletions
561
533
Count of Topo CartoSymcc deletions
8 953
6 393
Count of Topo CartoTxtcc deletions
20 946
22 296
Total Count of Inserts
866 957
837 247
Count of Topo Area inserts
198 781
189 219
Count of Topo Line inserts
595 718
587 842
Count of Topo Point inserts
17 417
13 345
Count of Topo Bline inserts
222
218
Count of Topo CartoSym inserts
23 256
17 235
Count of Topo CartoTxt inserts
31 563
29 388
Total Count of Modifications
634 202
736 646
Count of Topo Area Modifications
309 690
369 267
Count of Topo Line Modifications
308 659
353 690
Count of Topo Point Modifications
311
231
Count of Topo Bline Modifications
1 403
2 681
Count of Topo CartoSym Modifications
40
44
Count of Topo CartoTxt Modifications
14 099
10 733
COU Size (bytes)
336 114 289
333 062 363
In this release 10 minor errors were detected, of which 2 have existed since the previous refresh. All errors are considered to be minor errors. We aim to have all errors resolved prior to the next release as part of ongoing quality improvement.
The land cover specification for rural geographies has been refined. The Mountain and Moorland refinement was completed in 2022.
The rural geography updates began capture in May 2022. The initial updates fed through to the July 2022 release of OSMM Topography Layer, with the multi class land cover polygons completed in
December 2022. The single class land cover polygons will continue to feed through to product from April 2023.
The following two tables articulate this specification refinement:
Urban
0.1hectares (ha) (1 000m²)
5m
Rural
0.1hectares (ha) (1 000m²)
10m
Mountain and moorland
1.0hectares (ha) (10 000m²)
10m
Urban
0.1hectares (ha) (1 000m²)
5m
Rural
0.1hectares (ha) (1 000m²)
5m*
Mountain and moorland
0.1hectares (ha) (1 000m²)*
5m*
The asterisk symbol (*) shows which criteria have been refined.
The land cover specification refinement means that the rural land cover data within OSMM Topography Layer will become more granular, producing a more detailed view made up of smaller, more numerous polygons. This provides users with more accurate data that meets each individual’s specific requirements. These changes are purely refinements and do not change the data attribution.
Annex A shows three examples of how the rural land cover refinement is being translated into OSMM Topography Layer.
Numerous TOIDs (Topographic Identifiers) have changed since the last refresh, resulting in a visual difference in the data. The list below shows a sample of changed TOIDs and their locations that you can use as 'lookup samples' to validate that your latest supply has updated correctly:
osgb1000000182286603
339097.4, 551740.35
osgb5000005285000934
459029.88, 402617.33
osgb1000002318155560
533464.054, 122925.909
osgb1000000302327200
207276.41, 691450.97
osgb5000005297224912
430701.235, 346985.231
osgb1000002081333910
596419.64, 208356.555
The next release of OS MasterMap Topography Layer is scheduled for 24 June 2024.
Below are three real-world examples of how the rural land cover specification refinement has affected the data within OSMM Topography Layer. The examples showcase three areas in southern Scotland where the specification refinement has broken up one land polygon within the Topographic Area Feature Type into smaller, separate polygons.
OSMM Topography Layer (July 2022): osgb1000000316775097
OSMM Topography Layer (August 2022): osgb5000005297485451, osgb5000005297485455, osgb5000005297485456
Source imagery of example area one for comparative purposes:
Data before the rural land cover specification refinement update (OSMM Topography Layer – July 2022):
Data after the rural land cover specification refinement update (OSMM Topography Layer – August 2022):
OSMM Topography Layer (July 2022): osgb1000000318639911
OSMM Topography Layer (August 2022): osgb1000000318639911, osgb5000005298080383, osgb5000005298080465
Source imagery of example area two for comparative purposes:
Data before the rural land cover specification refinement update (OSMM Topography Layer – August 2022):
Data after the rural land cover specification refinement update (OSMM Topography Layer – October 2022):
OSMM Topography Layer (July 2022): osgb1000000319079420
OSMM Topography Layer (August 2022): osgb1000000319079420, osgb5000005298106224
Source imagery of example area three for comparative purposes:
Data before the rural land cover specification refinement update (OSMM Topography Layer – August 2022):
Data after the rural land cover specification refinement update (OSMM Topography Layer – October 2022):
This release note provides information about the latest release of OS MasterMap (OSMM) Topography Layer, released to customers on 20 November 2023.
The following table contains product counts for this release of OSMM Topography Layer data. The dates shown are extraction dates, not release dates.
Total Feature Count
506 051 882
506 484 147
Count of Topo Area
126 561 435
126 697 703
Count of Topo Line
348 736 616
348 999 864
Count of Topo Point
4 321 409
4 333 471
Count of Topo Bline
533 621
533 428
Count of Topo CartoSym
3 722 356
3 734 550
Count of Topo CartoTxt
22 176 445
22 185 131
Total Count of Deletes
552 193
482 784
Count of Topo Area deletions
90 968
78 620
Count of Topo Line deletions
413 319
360 998
Count of Topo Point deletions
4 058
3 993
Count of Topo Bline deletions
1 023
591
Count of Topo CartoSymcc deletions
9 835
9 635
Count of Topo CartoTxtcc deletions
32 990
28 947
Total Count of Inserts
972 994
915 049
Count of Topo Area inserts
225 863
214 888
Count of Topo Line inserts
672 929
624 246
Count of Topo Point inserts
14 334
16 055
Count of Topo Bline inserts
530
398
Count of Topo CartoSym inserts
20 171
21 829
Count of Topo CartoTxt inserts
39 167
37 633
Total Count of Modifications
833 584
681 711
Count of Topo Area Modifications
378 432
289 725
Count of Topo Line Modifications
430 672
369 012
Count of Topo Point Modifications
319 
374
Count of Topo Bline Modifications
1 190 
674
Count of Topo CartoSym Modifications
103
57
Count of Topo CartoTxt Modifications
22 868
21 869
COU Size (bytes)
413 944 082
402 922 509
Alongside GML format, OSMM Topography Layer is also available in GeoPackage and vector tiles formats (from March 2023). Please see the Getting Started with GeoPackage and Getting Started with Vector Tiles guides for more information on using these new formats. The product is supplied as an online download. You can download data in its various formats from the OS Data Hub.
26 minor errors were detected, which is 22 more than the 48 errors found in the last refresh. Of these errors, 3 have existed since the previous refresh – these are minor issues caused by conflict (where the geometry of adjacent feature has not been updated to match), but there are no visible issues.
An issue has been identified whereby Post Offices are being incorrectly attributed or deleted due to data misinterpretation. In the previous release over 1 100 affected Post Offices were noted. As a result, there are 966 remaining without cartographic text of ‘Post Office’ or ‘PO’ in the November 2023 release of OSMM Topography Layer. A solution is currently being implemented for this issue and we aim to rectify it as soon as possible.
The land cover specification for rural geographies has been refined. The Mountain and Moorland refinement was completed in 2022.
The rural geography updates began capture in May 2022. The initial updates fed through to the July 2022 release of OSMM Topography Layer, with the multi class land cover polygons completed in December 2022. The single class land cover polygons will continue to feed through to product from April 2023.
The following two tables articulate this specification refinement:
Urban
0.1hectares (ha) (1 000m²)
5m
Rural
0.1hectares (ha) (1 000m²)
10m
Mountain and moorland
1.0hectares (ha) (10 000m²)
10m
Urban
0.1hectares (ha) (1 000m²)
5m
Rural
0.1hectares (ha) (1 000m²)
5m*
Mountain and moorland
0.1hectares (ha) (1 000m²)*
5m*
The asterisk symbol (*) shows which criteria have been refined.
The land cover specification refinement means that the rural land cover data within OSMM Topography Layer will become more granular, producing a more detailed view made up of smaller more numerous polygons. This provides users with more accurate data that meets each individual’s specific requirements. These changes are purely refinements and do not change the data attribution.
Annex A shows three examples of how the rural land cover refinement is being translated into OSMM Topography Layer.
Numerous TOIDs (Topographic Identifiers) have changed since the last refresh, resulting in a visual difference in the data. The list below shows a sample of changed TOIDs and their locations that you can use as 'lookup samples' to validate that your latest supply has updated correctly:
osgb1000000288205307
259068.6, 910831.5
osgb5000005183695974
410989.2, 439867.5
osgb1000002057136077
548427.559, 256068.45
osgb1000000168084341
310922.73, 967740.4
osgb1000000321127198
231400.028, 393013.406
osgb5000005103319502
549683.928, 349919.463
The next release of OS MasterMap Topography Layer is scheduled for 04 January 2024.
Below are three real-world examples of how the rural land cover specification refinement has affected the data within OSMM Topography Layer. The examples showcase three areas in southern Scotland where the specification refinement has broken up one land polygon within the Topographic Area Feature Type into smaller, separate polygons.
OSMM Topography Layer (July 2022): osgb1000000316775097
OSMM Topography Layer (August 2022): osgb5000005297485451, osgb5000005297485455, osgb5000005297485456
Source imagery of example area one for comparative purposes:
Data before the rural land cover specification refinement update (OSMM Topography Layer – July 2022):
Data after the rural land cover specification refinement update (OSMM Topography Layer – August 2022):
OSMM Topography Layer (July 2022): osgb1000000318639911
OSMM Topography Layer (August 2022): osgb1000000318639911, osgb5000005298080383, osgb5000005298080465
Source imagery of example area two for comparative purposes:
Data before the rural land cover specification refinement update (OSMM Topography Layer – August 2022):
Data after the rural land cover specification refinement update (OSMM Topography Layer – October 2022):
OSMM Topography Layer (July 2022): osgb1000000319079420
OSMM Topography Layer (August 2022): osgb1000000319079420, osgb5000005298106224
Source imagery of example area three for comparative purposes:
Data before the rural land cover specification refinement update (OSMM Topography Layer – August 2022):
Data after the rural land cover specification refinement update (OSMM Topography Layer – October 2022):
This release note provides information about the latest release of OS MasterMap (OSMM) Topography Layer, released to customers on 02 April 2024.
The following table contains product counts for this release of OSMM Topography Layer data. The dates shown are extraction dates, not release dates.
Total Feature Count
507 375 850
507 879 548
Count of Topo Area
126 911 673
127 035 158
Count of Topo Line
349 600 457
349 942 731
Count of Topo Point
4 362 057
4 375 415
Count of Topo Bline
532 911
532 572
Count of Topo CartoSym
3 763 697
3 778 000
Count of Topo CartoTxt
22 205 055
22 215 672
Total Count of Deletes
352 971
363 259
Count of Topo Area deletions
72 340
75 296
Count of Topo Line deletions
246 393
253 444
Count of Topo Point deletions
4 698
4 059
Count of Topo Bline deletions
433
561
Count of Topo CartoSymcc deletions
11 208
8 953
Count of Topo CartoTxtcc deletions
17 899
20 946
Total Count of Inserts
811 142
866 957
Count of Topo Area inserts
180 007
198 781
Count of Topo Line inserts
551 663
595 718
Count of Topo Point inserts
21 692
17 417
Count of Topo Bline inserts
353
222
Count of Topo CartoSym inserts
29 505
23 256
Count of Topo CartoTxt inserts
27 922
31 563
Total Count of Modifications
600 677
634 202
Count of Topo Area Modifications
294 892
309 690
Count of Topo Line Modifications
291 597
308 659
Count of Topo Point Modifications
326
311
Count of Topo Bline Modifications
628
1 403
Count of Topo CartoSym Modifications
132
40
Count of Topo CartoTxt Modifications
13 102
14 099
COU Size (bytes)
386 470 897
336 114 289
9 minor errors were detected, which is 2 more than were found in the last refresh. Of these 9 errors, 2 have existed since the previous refresh. All errors are considered to be minor errors. We aim to have all errors resolved prior to the next release as part of ongoing quality improvement.
The land cover specification for rural geographies has been refined. The Mountain and Moorland refinement was completed in 2022.
The rural geography updates began capture in May 2022. The initial updates fed through to the July 2022 release of OSMM Topography Layer, with the multi class land cover polygons completed in December 2022. The single class land cover polygons will continue to feed through to product from April 2023.
The following two tables articulate this specification refinement:
Urban
0.1hectares (ha) (1 000m²)
5m
Rural
0.1hectares (ha) (1 000m²)
10m
Mountain and moorland
1.0hectares (ha) (10 000m²)
10m
Urban
0.1hectares (ha) (1 000m²)
5m
Rural
0.1hectares (ha) (1 000m²)
5m*
Mountain and moorland
0.1hectares (ha) (1 000m²)*
5m*
The asterisk symbol (*) shows which criteria have been refined.
The land cover specification refinement means that the rural land cover data within OSMM Topography Layer will become more granular, producing a more detailed view made up of smaller, more numerous polygons. This provides users with more accurate data that meets each individual’s specific requirements. These changes are purely refinements and do not change the data attribution.
Annex A shows three examples of how the rural land cover refinement is being translated into OSMM Topography Layer.
Numerous TOIDs (Topographic Identifiers) have changed since the last refresh, resulting in a visual difference in the data. The list below shows a sample of changed TOIDs and their locations that you can use as 'lookup samples' to validate that your latest supply has updated correctly:
TOID
Location (i.e. XY coordinates)
osgb5000005109728428
322926.508, 704955.071
oosgb5000005252408974
396225, 4754643
osgb1000000030598131
504443.618, 242017.376
osgb1000000293839535
203531.7, 862031.28
osgb5000005299999425
406660.07, 436264.33
osgb5000005243520249
505688.732, 484331.45
The next release of OS MasterMap Topography Layer is scheduled for 13 May 2024.
Below are three real-world examples of how the rural land cover specification refinement has affected the data within OSMM Topography Layer. The examples showcase three areas in southern Scotland where the specification refinement has broken up one land polygon within the Topographic Area Feature Type into smaller, separate polygons.
OSMM Topography Layer (July 2022): osgb1000000316775097
OSMM Topography Layer (August 2022): osgb5000005297485451, osgb5000005297485455, osgb5000005297485456
Source imagery of example area one for comparative purposes:
Data before the rural land cover specification refinement update (OSMM Topography Layer – July 2022):
Data after the rural land cover specification refinement update (OSMM Topography Layer – August 2022):
OSMM Topography Layer (July 2022): osgb1000000318639911
OSMM Topography Layer (August 2022): osgb1000000318639911, osgb5000005298080383, osgb5000005298080465
Source imagery of example area two for comparative purposes:
Data before the rural land cover specification refinement update (OSMM Topography Layer – August 2022):
Data after the rural land cover specification refinement update (OSMM Topography Layer – October 2022):
OSMM Topography Layer (July 2022): osgb1000000319079420
OSMM Topography Layer (August 2022): osgb1000000319079420, osgb5000005298106224
Source imagery of example area three for comparative purposes:
Data before the rural land cover specification refinement update (OSMM Topography Layer – August 2022):
Data after the rural land cover specification refinement update (OSMM Topography Layer – October 2022):
Below are three real-world examples of how the rural land cover specification refinement has affected the data within OSMM Topography Layer. The examples showcase three areas in southern Scotland where the specification refinement has broken up one land polygon within the Topographic Area Feature Type into smaller, separate polygons.
OSMM Topography Layer (July 2022): osgb1000000316775097
OSMM Topography Layer (August 2022): osgb5000005297485451, osgb5000005297485455, osgb5000005297485456
Source imagery of example area one for comparative purposes:
Data before the rural land cover specification refinement update (OSMM Topography Layer – July 2022):
Data after the rural land cover specification refinement update (OSMM Topography Layer – August 2022):
OSMM Topography Layer (July 2022): osgb1000000318639911
OSMM Topography Layer (August 2022): osgb1000000318639911, osgb5000005298080383, osgb5000005298080465
Source imagery of example area two for comparative purposes:
Data before the rural land cover specification refinement update (OSMM Topography Layer – August 2022):
Data after the rural land cover specification refinement update (OSMM Topography Layer – October 2022):
OSMM Topography Layer (July 2022): osgb1000000319079420
OSMM Topography Layer (August 2022): osgb1000000319079420, osgb5000005298106224
Source imagery of example area three for comparative purposes:
Data before the rural land cover specification refinement update (OSMM Topography Layer – August 2022):
Data after the rural land cover specification refinement update (OSMM Topography Layer – October 2022):
This release note provides information about the latest release of OS MasterMap (OSMM) Topography Layer, released to customers on 19 February 2024.
The following table contains product counts for this release of OSMM Topography Layer data. The dates shown are extraction dates, not release dates.
In this release 7 minor errors were detected, which is 1 more than the 6 errors found in the last refresh. Of these errors, 1 has existed since the previous refresh. 6 of these are minor issues – these are minor issues with no visible issues, and there is 1 serious error of a double digitised line.
We aim to have all errors resolved prior to the next release as part of ongoing quality improvements.
The land cover specification for rural geographies has been refined. The Mountain and Moorland refinement was completed in 2022.
The rural geography updates began capture in May 2022. The initial updates fed through to the July 2022 release of OSMM Topography Layer, with the multi class land cover polygons completed in December 2022. The single class land cover polygons will continue to feed through to product from April 2023.
The following two tables articulate this specification refinement:
The asterisk symbol (*) shows which criteria have been refined.
The land cover specification refinement means that the rural land cover data within OSMM Topography Layer will become more granular, producing a more detailed view made up of smaller more numerous polygons. This provides users with more accurate data that meets each individual’s specific requirements. These changes are purely refinements and do not change the data attribution.
Numerous TOIDs (Topographic Identifiers) have changed since the last refresh, resulting in a visual difference in the data. The list below shows a sample of changed TOIDs and their locations that you can use as 'lookup samples' to validate that your latest supply has updated correctly:
The next release of OS MasterMap Topography Layer is scheduled for 02 April 2024.
This release note provides information about the latest release of OS MasterMap (OSMM) Topography Layer, released to customers on 04 January 2024
The following table contains product counts for this release of OSMM Topography Layer data. The dates shown are extraction dates, not release dates.
In this release 6 minor errors were detected, which is 20 less than the 26 errors found in the last refresh. Of these errors, 2 have existed since the previous refresh – these are minor issues caused by conflict (where the geometry of adjacent feature has not been updated to match), but there are no visible issues.
The land cover specification for rural geographies has been refined. The Mountain and Moorland refinement was completed in 2022.
The rural geography updates began capture in May 2022. The initial updates fed through to the July 2022 release of OSMM Topography Layer, with the multi class land cover polygons completed in December 2022. The single class land cover polygons will continue to feed through to product from April 2023.
The following two tables articulate this specification refinement:
The asterisk symbol (*) shows which criteria have been refined.
The land cover specification refinement means that the rural land cover data within OSMM Topography Layer will become more granular, producing a more detailed view made up of smaller more numerous polygons. This provides users with more accurate data that meets each individual’s specific requirements. These changes are purely refinements and do not change the data attribution.
Numerous TOIDs (Topographic Identifiers) have changed since the last refresh, resulting in a visual difference in the data. The list below shows a sample of changed TOIDs and their locations that you can use as 'lookup samples' to validate that your latest supply has updated correctly:
The next release of OS MasterMap Topography Layer is scheduled for 19 February 2024.
This release note provides information about the latest release of OS MasterMap (OSMM) Topography Layer, released to customers on 16 December 2024.
The following table contains product counts for this release of OSMM Topography Layer data. The dates shown are extraction dates, not release dates.
Numerous TOIDs (Topographic Identifiers) have changed since the last refresh, resulting in a visual difference in the data. The list below shows a sample of changed TOIDs and their locations that you can use as 'lookup samples' to validate that your latest supply has updated correctly:
In this release 5 errors were detected, of which, 2 have existed since the previous refresh. These are all considered to be minor errors and there are no major errors present.
We aim to have all errors resolved prior to the next release as part of ongoing quality improvements.
The next release of OS MasterMap Topography Layer is scheduled for 03 February 2025.
The land cover specification for rural geographies has been refined. The Mountain and Moorland refinement was completed in 2022.
The rural geography updates began capture in May 2022. The initial updates fed through to the July 2022 release of OSMM Topography Layer, with the multi class land cover polygons completed in December 2022. The single class land cover polygons will continue to feed through to product from April 2023.
The following two tables articulate this specification refinement:
Note: The asterisk symbol (*) shows which criteria have been refined.
The land cover specification refinement means that the rural land cover data within OSMM Topography Layer will become more granular, producing a more detailed view made up of smaller more numerous polygons. This provides users with more accurate data that meets each individual’s specific requirements. These changes are purely refinements and do not change the data attribution.
Annex A shows three examples of how the rural land cover refinement is being translated into OSMM Topography Layer.
Alongside GML format, OSMM Topography Layer is also available in GeoPackage and vector tiles formats (from March 2023). Please see the and guides for more information on using these new formats. The product is supplied as an online download. You can download data in its various formats from the .
shows three examples of how the rural land cover refinement is being translated into OSMM Topography Layer.
Alongside GML format, OSMM Topography Layer is also available in GeoPackage and vector tiles formats (from March 2023). Please see the and guides for more information on using these new formats. The product is supplied as an online download. You can download data in its various formats from the .
shows three examples of how the rural land cover refinement is being translated into OSMM Topography Layer.
Total Feature Count
506 917 679
507 375 850
Count of Topo Area
126 804 006
126 911 673
Count of Topo Line
349 295 187
349 600 457
Count of Topo Point
4 345 063
4 362 057
Count of Topo Bline
532 991
532 911
Count of Topo CartoSym
3 745 400
3 763 697
Count of Topo CartoTxt
22 195 032
22 205 055
Total Count of Deletes
333 884
352 971
Count of Topo Area deletions
70 410
72 340
Count of Topo Line deletions
231 489
246 393
Count of Topo Point deletions
3 420
4 698
Count of Topo Bline deletions
828
433
Count of Topo CartoSymcc deletions
7 670
11 208
Count of Topo CartoTxtcc deletions
20 067
17 899
Total Count of Inserts
767 416
811 142
Count of Topo Area inserts
176 713
180 007
Count of Topo Line inserts
526 812
551 663
Count of Topo Point inserts
15 012
21 692
Count of Topo Bline inserts
391
353
Count of Topo CartoSym inserts
18 520
29 505
Count of Topo CartoTxt inserts
29 968
27 922
Total Count of Modifications
515 536
600 677
Count of Topo Area Modifications
246 717
294 892
Count of Topo Line Modifications
254 055
291 597
Count of Topo Point Modifications
254
326
Count of Topo Bline Modifications
955
628
Count of Topo CartoSym Modifications
45
132
Count of Topo CartoTxt Modifications
13 510
13 102
COU Size (bytes)
347 863 984
386 470 897
Urban
0.1hectares (ha) (1 000m²)
5m
Rural
0.1hectares (ha) (1 000m²)
10m
Mountain and moorland
1.0hectares (ha) (10 000m²)
10m
Urban
0.1hectares (ha) (1 000m²)
5m
Rural
0.1hectares (ha) (1 000m²)
5m*
Mountain and moorland
0.1hectares (ha) (1 000m²)*
5m*
osgb1000000175416836
332000, 721912.22
osgb1000000230216079
335945.87, 440115.421
osgb5000005128685631
578813.895, 172187.251
osgb5000005327816366
265014.445, 842929.902
osgb5000005328747598
400486.093, 278819.54
osgb5000005154766496
617199.12, 165232.91
Total Feature Count
506 484 147
506 917 679
Count of Topo Area
126 697 703
126 804 006
Count of Topo Line
348 999 864
349 295 187
Count of Topo Point
4 333 471
4 345 063
Count of Topo Bline
533 428
532 991
Count of Topo CartoSym
3 734 550
3 745 400
Count of Topo CartoTxt
22 185 131
22 195 032
Total Count of Deletes
482 784
333 884
Count of Topo Area deletions
78 620
70 410
Count of Topo Line deletions
360 998
231 489
Count of Topo Point deletions
3 993
3 420
Count of Topo Bline deletions
591
828
Count of Topo CartoSymcc deletions
9 635
7 670
Count of Topo CartoTxtcc deletions
28 947
20 067
Total Count of Inserts
915 049
767 416
Count of Topo Area inserts
214 888
176 713
Count of Topo Line inserts
624 246
526 812
Count of Topo Point inserts
16 055
15 012
Count of Topo Bline inserts
398
391
Count of Topo CartoSym inserts
21 829
18 520
Count of Topo CartoTxt inserts
37 633
29 968
Total Count of Modifications
681 711
515 536
Count of Topo Area Modifications
289 725
246 717
Count of Topo Line Modifications
369 012
254 055
Count of Topo Point Modifications
374
254
Count of Topo Bline Modifications
674
955
Count of Topo CartoSym Modifications
57
45
Count of Topo CartoTxt Modifications
21 869
13 510
COU Size (bytes)
402 922 509
347 863 984
Urban
0.1hectares (ha) (1 000m²)
5m
Rural
0.1hectares (ha) (1 000m²)
10m
Mountain and moorland
1.0hectares (ha) (10 000m²)
10m
Urban
0.1hectares (ha) (1 000m²)
5m
Rural
0.1hectares (ha) (1 000m²)
5m*
Mountain and moorland
0.1hectares (ha) (1 000m²)*
5m*
osgb1000000168404255
328579.99, 958515.98
osgb5000005152517605
348374.945, 431019.423
osgb1000001824692637
541419.437, 101834.574
osgb1000000385134315
188967, 835637.5
osgb5000005299962750
416833.55, 444757.47
osgb1000000013827617
508743.536, 482017.503
NS4505
NS 47825 05240
247790.7, 605224.0
NX3540
NX 37464 41871
237419, 541979
NX6550
NX 68975 51146
268968, 551139
NS4505
NS 47825 05240
247790.7, 605224.0
NX3540
NX 37464 41871
237419, 541979
NX6550
NX 68975 51146
268968, 551139
NS4505
NS 47825 05240
247790.7, 605224.0
NX3540
NX 37464 41871
237419, 541979
NX6550
NX 68975 51146
268968, 551139
NS4505
NS 47825 05240
247790.7, 605224.0
NX3540
NX 37464 41871
237419, 541979
NX6550
NX 68975 51146
268968, 551139
NS4505
NS 47825 05240
247790.7, 605224.0
NX3540
NX 37464 41871
237419, 541979
NX6550
NX 68975 51146
268968, 551139
NS4505
NS 47825 05240
247790.7, 605224.0
NX3540
NX 37464 41871
237419, 541979
NX6550
NX 68975 51146
268968, 551139
NS4505
NS 47825 05240
247790.7, 605224.0
NX3540
NX 37464 41871
237419, 541979
NX6550
NX 68975 51146
268968, 551139
Total Feature Count
510 670 422
511 231 453
Count of Topo Area
127 758 433
127 905 526
Count of Topo Line
351 963 619
352 369 150
Count of Topo Point
4 391 190
4 391 725
Count of Topo Bline
524 557
524 140
Count of Topo CartoSym
3 780 899
3 780 153
Count of Topo CartoTxt
22 251 724
22 260 759
Total Count of Deletes
666 186
680 332
Count of Topo Area deletions
138 007
142 472
Count of Topo Line deletions
496 634
516 063
Count of Topo Point deletions
1 941
1 952
Count of Topo Bline deletions
3 858
1 080
Count of Topo CartoSym deletions
7 484
3 478
Count of Topo CartoTxt deletions
18 262
15 287
Total Count of Inserts
1 269 362
1 241 363
Count of Topo Area inserts
298 928
289 565
Count of Topo Line inserts
938 020
921 594
Count of Topo Point inserts
3 001
2 487
Count of Topo Bline inserts
698
663
Count of Topo CartoSym inserts
3 205
2 732
Count of Topo CartoTxt inserts
25 510
24 322
Total Count of Modifications
1 257 214
1 226 070
Count of Topo Area Modifications
643 905
624 491
Count of Topo Line Modifications
597 362
587 411
Count of Topo Point Modifications
275
287
Count of Topo Bline Modifications
2 456
767
Count of Topo CartoSym Modifications
53
22
Count of Topo CartoTxt Modifications
13 163
13 092
COU Size (bytes)
543 866 589
530 999 702
osgb5000005336348561
303087.887, 857162.222
osgb5000005331742080
360972.262, 394804.694
osgb1000001644059895
515401.35, 461688.52
osgb1000000288040716
216861.731, 933944.811
osgb1000000223011430
331477.816, 481794.328
osgb5000005256265197
559369.893, 313898.605
Geographic area
Minimum area size for land cover
Minimum width
Urban
0.1hectares (ha) (1 000m²)
5m
Rural
0.1hectares (ha) (1 000m²)
10m
Mountain and moorland
1.0hectares (ha) (10 000m²)
10m
Geographic area
Minimum area size for land cover
Minimum width
Urban
0.1hectares (ha) (1 000m²)
5m
Rural
0.1hectares (ha) (1 000m²)
5m*
Mountain and moorland
0.1hectares (ha) (1 000m²)*
5m*
Below are three real-world examples of how the rural land cover specification refinement has affected the data within OSMM Topography Layer. The examples showcase three areas in southern Scotland where the specification refinement has broken up one land polygon within the Topographic Area Feature Type into smaller, separate polygons.
NS4505
NS 47825 05240
247790.7, 605224.0
OSMM Topography Layer (July 2022): osgb1000000316775097
OSMM Topography Layer (August 2022): osgb5000005297485451, osgb5000005297485455, osgb5000005297485456
Source imagery of example area one for comparative purposes:
Data before the rural land cover specification refinement update (OSMM Topography Layer – July 2022):
Data after the rural land cover specification refinement update (OSMM Topography Layer – August 2022):
NX3540
NX 37464 41871
237419, 541979
OSMM Topography Layer (July 2022): osgb1000000318639911
OSMM Topography Layer (August 2022): osgb1000000318639911, osgb5000005298080383, osgb5000005298080465
Source imagery of example area two for comparative purposes:
Data before the rural land cover specification refinement update (OSMM Topography Layer – August 2022):
Data after the rural land cover specification refinement update (OSMM Topography Layer – October 2022):
NX6550
NX 68975 51146
268968, 551139
OSMM Topography Layer (July 2022): osgb1000000319079420
OSMM Topography Layer (August 2022): osgb1000000319079420, osgb5000005298106224
Source imagery of example area three for comparative purposes:
Data before the rural land cover specification refinement update (OSMM Topography Layer – August 2022):
Data after the rural land cover specification refinement update (OSMM Topography Layer – October 2022):
Below are three real-world examples of how the rural land cover specification refinement has affected the data within OSMM Topography Layer. The examples showcase three areas in southern Scotland where the specification refinement has broken up one land polygon within the Topographic Area Feature Type into smaller, separate polygons.
NS4505
NS 47825 05240
247790.7, 605224.0
OSMM Topography Layer (July 2022): osgb1000000316775097
OSMM Topography Layer (August 2022): osgb5000005297485451, osgb5000005297485455, osgb5000005297485456
Source imagery of example area one for comparative purposes:
Data before the rural land cover specification refinement update (OSMM Topography Layer – July 2022):
Data after the rural land cover specification refinement update (OSMM Topography Layer – August 2022):
NX3540
NX 37464 41871
237419, 541979
OSMM Topography Layer (July 2022): osgb1000000318639911
OSMM Topography Layer (August 2022): osgb1000000318639911, osgb5000005298080383, osgb5000005298080465
Source imagery of example area two for comparative purposes:
Data before the rural land cover specification refinement update (OSMM Topography Layer – August 2022):
Data after the rural land cover specification refinement update (OSMM Topography Layer – October 2022):
NX6550
NX 68975 51146
268968, 551139
OSMM Topography Layer (July 2022): osgb1000000319079420
OSMM Topography Layer (August 2022): osgb1000000319079420, osgb5000005298106224
Source imagery of example area three for comparative purposes:
Data before the rural land cover specification refinement update (OSMM Topography Layer – August 2022):
Data after the rural land cover specification refinement update (OSMM Topography Layer – October 2022):
Below are three real-world examples of how the rural land cover specification refinement has affected the data within OSMM Topography Layer. The examples showcase three areas in southern Scotland where the specification refinement has broken up one land polygon within the Topographic Area Feature Type into smaller, separate polygons.
NS4505
NS 47825 05240
247790.7, 605224.0
OSMM Topography Layer (July 2022): osgb1000000316775097
OSMM Topography Layer (August 2022): osgb5000005297485451, osgb5000005297485455, osgb5000005297485456
Source imagery of example area one for comparative purposes:
Data before the rural land cover specification refinement update (OSMM Topography Layer – July 2022):
Data after the rural land cover specification refinement update (OSMM Topography Layer – August 2022):
NX3540
NX 37464 41871
237419, 541979
OSMM Topography Layer (July 2022): osgb1000000318639911
OSMM Topography Layer (August 2022): osgb1000000318639911, osgb5000005298080383, osgb5000005298080465
Source imagery of example area two for comparative purposes:
Data before the rural land cover specification refinement update (OSMM Topography Layer – August 2022):
Data after the rural land cover specification refinement update (OSMM Topography Layer – October 2022):
NX6550
NX 68975 51146
268968, 551139
OSMM Topography Layer (July 2022): osgb1000000319079420
OSMM Topography Layer (August 2022): osgb1000000319079420, osgb5000005298106224
Source imagery of example area three for comparative purposes:
Data before the rural land cover specification refinement update (OSMM Topography Layer – August 2022):
Data after the rural land cover specification refinement update (OSMM Topography Layer – October 2022):
