Layers and styles

Find out what zoom levels and data products are available for the two projections used by the API, plus the four styles available for the maps: Road, Outdoor, Light and Leisure.

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	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 road, outdoor and light styles 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 levels 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.

Road, Outdoor and Light Styles

Zoom Level	Resolution	Scale	Data Licence	Data Product
7	1,223	1:4 622 324	Open data	Open Zoomstack
8	611	1:2 311 162	Open data	Open Zoomstack
9	306	1:1 155 581	Open data	Open Zoomstack
10	153	1:577 791	Open data	Open Zoomstack
11	76	1:288 895	Open data	Open Zoomstack
12	38	1:144 448	Open data	Open Zoomstack
13	19	1:72 224	Open data	Open Zoomstack
14	9.6	1:36 112	Open data	Open Zoomstack
15	4.8	1:18 056	Open data	Open Zoomstack
16	2.4	1:9 028	Open data	Open Zoomstack
17	1.2	1:4 514	Premium data	MasterMap Topography blended with Open Zoomstack
18	0.60	1:2 257	Premium data	MasterMap Topography
19	0.30	1:1 128	Premium data	MasterMap Topography
20	0.15	1:564	Premium data	MasterMap Topography

EPSG:27700 tile matrix set

The road, outdoor and light styles and leisure styles tables and below show the resolution (meters per pixel) and scale of the zoom levels within the EPSG:27700 tile matrix sets. The scale is calculated at a DPI of 96. The tables also show which zoom levels are OS OpenData, and which levels are Premium data.

The zoom levels for the EPSG:27700 tile matrix set starts at 0 rather than at level 7, which is used for the EPSG:3857 tile matrix set. The range of resolutions and scales is comparable across both tile matrix sets. This means EPSG:27700 zoom level 0 is similar to EPSG:3857 zoom level 7.

Road, Outdoor and Light Styles

Zoom Level	Resolution	Scale	Data Licence	Data Product
0	896.0	1:3 386 450	Open data	Open Zoomstack
1	448.0	1:1 693 225	Open data	Open Zoomstack
2	224.0	1:846 612	Open data	Open Zoomstack
3	112.0	1:423 306	Open data	Open Zoomstack
4	56.0	1:211 653	Open data	Open Zoomstack
5	28.0	1:105 827	Open data	Open Zoomstack
6	14.0	1:52 913	Open data	Open Zoomstack
7	7.0	1:26 457	Open data	Open Zoomstack
8	3.5	1:13 228	Open data	Open Zoomstack
9	1.75	1:6 614	Open data	Open Zoomstack
10	0.875	1:3 307	Premium data	MasterMap Topography blended with Open Zoomstack
11	0.4375	1:1 654	Premium data	MasterMap Topography
12	0.21875	1:827	Premium data	MasterMap Topography
13	0.109375	1:413	Premium data	MasterMap Topography

Leisure Style

Zoom Level	Resolution	Scale	Data Licence	Data Product
0	896.0	1:3 386 450	Open data	GB Overview Maps
1	448.0	1:1 693 225	Open data	Miniscale
2	224.0	1:846 612	Open data	Miniscale
3	112.0	1:423 306	Open data	1:250 000 Scale Colour Raster
4	56.0	1:211 653	Open data	1:250 000 Scale Colour Raster
5	28.0	1:105 827	Open data	1:50 000 Scale Colour Raster
6	14.0	1:52 913	Premium data	1:50 000 Scale Colour Raster
7	7.0	1:26 457	Premium data	1:25 000 Scale Colour Raster
8	3.5	1:13 228	Premium data	1:25 000 Scale Colour Raster
9	1.75	1:6 614	Premium data	1:25 000 Scale Colour Raster