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).
| Style | Projection | Layer Name | Tile Matrix Set |
|---|---|---|---|
Road | EPSG:27700 |
| EPSG:27700 |
Road | EPSG:3857 |
| EPSG:3857 |
Outdoor | EPSG:27700 |
| EPSG:27700 |
Outdoor | EPSG:3857 |
| EPSG:3857 |
Light | EPSG:27700 |
| EPSG:27700 |
Light | EPSG:3857 |
| EPSG:3857 |
Leisure | EPSG:27700 |
| EPSG:27700 |
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.
| Zoom level | Resolution | Scale | Road, Outdoor and Light styles |
|---|---|---|---|
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 & scales is comparable. EPSG:27700 zoom level 0 is similar to EPSG:3857 zoom level 7.
| Zoom level | Resolution | Scale | Road, Outdoor and Light styles | Leisure style |
|---|---|---|---|---|
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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