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This release note provides information about the latest release of OS MasterMap (OSMM) Topography Layer, released to customers on 24th 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.
OSMM Topography Layer | Count on 25/04/2024 (Previous release) | Count on 06/06/2024 (Current release) |
---|---|---|
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 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:
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.
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):
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):
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 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 latest release of OS MasterMap (OSMM) Topography Layer, released to customers on 13th 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.
OSMM Topography Layer | Count on 14/03/2024 (Current release) | Count on 25/04/2024 (Current release) |
---|
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:
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:
The next release of OS MasterMap Topography Layer is scheduled for 24th 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.
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):
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):
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 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.
OSMM Topography Layer | Count on 05/09/2024 (Previous release) | Count on 17/10/2024 (Current release) |
---|
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 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:
Old land cover specification
New land cover specification
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.
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):
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):
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):
TOID | Location (i.e. XY coordinates) |
---|---|
Geographic area | Minimum area size for land cover | Minimum width |
---|
TOID | Location (i.e. XY coordinates) |
---|
5km tile | OS grid reference | Coordinates (OSGB36) |
---|
OSMM Topography Layer (July 2022) | OSMM Topography Layer (August 2022) |
---|
5km tile | OS grid reference | Coordinates (OSGB36) |
---|
OSMM Topography Layer (August 2022) | OSMM Topography Layer (October 2022) |
---|
5km tile | OS grid reference | Coordinates (OSGB36) |
---|
OSMM Topography Layer (August 2022) | OSMM Topography Layer (October 2022) |
---|
TOID | Location (i.e. XY coordinates) |
---|
Geographic area | Minimum area size for land cover | Minimum width |
---|
Geographic area | Minimum area size for land cover | Minimum width |
---|
OSMM Topography Layer (July 2022) | OSMM Topography Layer (August 2022) |
---|
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
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
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*
5km tile
OS grid reference
Coordinates (OSGB36)
NS4505
NS 47825 05240
247790.7,605224.0
OSMM Topography Layer (July 2022)
OSMM Topography Layer (August 2022)
osgb1000000316775097
osgb5000005297485451
osgb5000005297485455
osgb5000005297485456
5km tile
OS grid reference
Coordinates (OSGB36)
NX3540
NX 37464 41871
237419, 541979
OSMM Topography Layer (August 2022)
OSMM Topography Layer (October 2022)
osgb1000000318639911
osgb1000000318639911
osgb5000005298080383
osgb5000005298080465
5km tile
OS grid reference
Coordinates (OSGB36)
NX6550
NX 68975 51146
268968, 551139
OSMM Topography Layer (August 2022)
OSMM Topography Layer (October 2022)
osgb1000000319079420
osgb1000000319079420
osgb5000005298106224
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 |
Urban | 0.1hectares (ha) (1 000m²) | 5m |
Rural | 0.1hectares (ha) (1 000m²) | 10m |
Mountain and moorland | 1.0hectares (ha) (10 000m²) | 10m |
New land cover specification |
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* |
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 |
NS4505 | NS 47825 05240 | 247790.7,605224.0 |
osgb1000000316775097 | osgb5000005297485451 |
osgb5000005297485455 |
osgb5000005297485456 |
NX3540 | NX 37464 41871 | 237419, 541979 |
osgb1000000318639911 | osgb1000000318639911 |
osgb5000005298080383 |
osgb5000005298080465 |
NX6550 | NX 68975 51146 | 268968, 551139 |
osgb1000000319079420 | osgb1000000319079420 |
osgb5000005298106224 |
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 |
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 |
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* |
5km tile | OS grid reference | Coordinates (OSGB36) |
NS4505 | NS 47825 05240 | 247790.7 605224.0 |
osgb1000000316775097 | osgb5000005297485451 |
osgb5000005297485455 |
osgb5000005297485456 |
5km tile | OS grid reference | Coordinates (OSGB36) |
NX3540 | NX 37464 41871 | 237419, 541979 |
OSMM Topography Layer (August 2022) | OSMM Topography Layer (October 2022) |
osgb1000000318639911 | osgb1000000318639911 |
osgb5000005298080383 |
osgb5000005298080465 |
5km tile | OS grid reference | Coordinates (OSGB36) |
NX6550 | NX 68975 51146 | 268968, 551139 |
OSMM Topography Layer (August 2022) | OSMM Topography Layer (October 2022) |
osgb1000000319079420 | osgb1000000319079420 |
osgb5000005298106224 |
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.
OSMM Topography Layer | Count on 25/07/2024 (Previous release) | Count on 05/09/2024 (Current release) |
---|---|---|
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 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:
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.
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):
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):
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 2nd 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.
OSMM Topography Layer | Count on 01/02/2024 (Previous release) | Count on 14/03/2024 (Current release) |
---|---|---|
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:
New land cover specification
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:
The next release of OS MasterMap Topography Layer is scheduled for 13th 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.
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):
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):
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 12th 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.
OSMM Topography Layer | Count on 06/06/2024 (Previous release) | Count on 25/07/2024 (Current release) |
---|---|---|
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 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 23rd 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:
Old land cover specification
New land cover specification
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.
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):
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):
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):
TOID | Location (i.e. XY coordinates) |
---|---|
Geographic area | Minimum area size for land cover | Minimum width |
---|---|---|
Geographic area | Minimum area size for land cover | Minimum width |
---|---|---|
TOID | Location (i.e. XY coordinates) |
---|---|
Geographic area | Minimum area size for land cover | Minimum width |
---|---|---|
Geographic area | Minimum area size for land cover | Minimum width |
---|---|---|
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
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
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*
5km tile
OS grid reference
Coordinates (OSGB36)
NS4505
NS 47825 05240
247790.7 605224.0
OSMM Topography Layer (July 2022)
OSMM Topography Layer (August 2022)
osgb1000000316775097
osgb5000005297485451
osgb5000005297485455
osgb5000005297485456
5km tile
OS grid reference
Coordinates (OSGB36)
NX3540
NX 37464 41871
237419, 541979
OSMM Topography Layer (August 2022)
OSMM Topography Layer (October 2022)
osgb1000000318639911
osgb1000000318639911
osgb5000005298080383
osgb5000005298080465
5km tile
OS grid reference
Coordinates (OSGB36)
NX6550
NX 68975 51146
268968, 551139
OSMM Topography Layer (August 2022)
OSMM Topography Layer (October 2022)
osgb1000000319079420
osgb1000000319079420
osgb5000005298106224
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
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*
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
5km tile
OS grid reference
Coordinates (OSGB36)
NS4505
NS 47825 05240
247790.7,605224.0
OSMM Topography Layer (July 2022)
OSMM Topography Layer (August 2022)
osgb1000000316775097
osgb5000005297485451
osgb5000005297485455
osgb5000005297485456
5km tile
OS grid reference
Coordinates (OSGB36)
NX3540
NX 37464 41871
237419, 541979
OSMM Topography Layer (August 2022)
OSMM Topography Layer (October 2022)
osgb1000000318639911
osgb1000000318639911
osgb5000005298080383
osgb5000005298080465
5km tile
OS grid reference
Coordinates (OSGB36)
NX6550
NX 68975 51146
268968, 551139
OSMM Topography Layer (August 2022)
OSMM Topography Layer (October 2022)
osgb1000000319079420
osgb1000000319079420
osgb5000005298106224
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
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
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*
5km tile
OS grid reference
Coordinates (OSGB36)
NS4505
NS 47825 05240
247790.7 605224.0
OSMM Topography Layer (July 2022)
OSMM Topography Layer (August 2022)
osgb1000000316775097
osgb5000005297485451
osgb5000005297485455
osgb5000005297485456
5km tile
OS grid reference
Coordinates (OSGB36)
NX3540
NX 37464 41871
237419, 541979
OSMM Topography Layer (August 2022)
OSMM Topography Layer (October 2022)
osgb1000000318639911
osgb1000000318639911
osgb5000005298080383
osgb5000005298080465
5km tile
OS grid reference
Coordinates (OSGB36)
NX6550
NX 68975 51146
268968, 551139
OSMM Topography Layer (August 2022)
OSMM Topography Layer (October 2022)
osgb1000000319079420
osgb1000000319079420
osgb5000005298106224