Layers and styles
OS Maps API is available as EPSG:27700 (British National Grid which is applicable just for GB) and EPSG:3857 (Web Mercator which is a global coordinate system).
The API includes four OS styles: Road, Outdoor, Light (in both 27700 and 3857), and Leisure (in 27700).
Road
EPSG:27700
Road_27700
EPSG:27700
Road
EPSG:3857
Road_3857
EPSG:3857
Outdoor
EPSG:27700
Outdoor_27700
EPSG:27700
Outdoor
EPSG:3857
Outdoor_3857
EPSG:3857
Light
EPSG:27700
Light_27700
EPSG:27700
Light
EPSG:3857
Light_3857
EPSG:3857
Leisure
EPSG:27700
Leisure_27700
EPSG:27700
Light
Outdoor
Road
Leisure
EPSG:3857 tile matrix set
The table below shows the resolution (meters per pixel) and scale of the zoom levels within the EPSG:3857 tile matrix set. The scale is calculated at a DPI of 96. The table also shows which zoom levels are OS OpenData, and which are Premium data.
The zoom levels start at 7 to fit in with the industry standard initial zoom layer. This improves the interoperability of this tile matrix set with third party tools and applications.
7
1,223
1:4 622 324
Open data
8
611
1:2 311 162
Open data
9
306
1:1 155 581
Open data
10
153
1:577 791
Open data
11
76
1:288 895
Open data
12
38
1:144 448
Open data
13
19
1:72 224
Open data
14
9.6
1:36 112
Open data
15
4.8
1:18 056
Open data
16
2.4
1:9 028
Open data
17
1.2
1:4 514
Premium data
18
0.60
1:2 257
Premium data
19
0.30
1:1 128
Premium data
20
0.15
1:564
Premium data
EPSG:27700 tile matrix set
The table below shows the resolution (meters per pixel) and scale of the zoom levels within the EPSG:27700 tile matrix set. The scale is calculated at a DPI of 96. The table also shows which zoom levels are OS OpenData, and which are Premium data.
The zoom levels start at 0 rather than at 7 used for the EPSG:3857 tile matrix set, but the range of resolutions and scales is comparable. EPSG:27700 zoom level 0 is similar to EPSG:3857 zoom level 7.
0
896.0
1:3 386 450
Open data
Open data
1
448.0
1:1 693 225
Open data
Open data
2
224.0
1:846 612
Open data
Open data
3
112.0
1:423 306
Open data
Open data
4
56.0
1:211 653
Open data
Open data
5
28.0
1:105 827
Open data
Open data
6
14.0
1:52 913
Open data
Premium data
7
7.0
1:26 457
Open data
Premium data
8
3.5
1:13 228
Open data
Premium data
9
1.75
1:6 614
Open data
Premium data
10
0.875
1:3 307
Premium data
N/A
11
0.4375
1:1 654
Premium data
N/A
12
0.21875
1:827
Premium data
N/A
13
0.109375
1:413
Premium data
N/A
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