What data is available?

Vector Tile API you can connect to different layers for different use cases, including a detailed basemap and several data overlays.

The map features don’t contain the complete list of attribution from the full data products. We have selected attribution that is useful for visualisation. The inclusion of unique IDs (where available) allow you to cross reference with the full product, for example, with OS Features API.

Basemap

This is a detailed OS basemap made from OS Open Zoomstack and OS MasterMap Topography Layer.

The OS MasterMap Topography Layer building features have a property called RelHMax (height from the ground to the top of the building) which you can use to extrude and create 3D buildings.

Data overlays

The following table details the datasets that can be used as overlays to the basemap to add additional information:

Overlay
layer-name
Description
Data Plan

boundaries

This is a polygon layer made from Boundary-Line which can be used for identifying boundaries (for example, Counties, Districts and Parishes) and creating choropleth map overlays.

OS OpenData

greenspace

This is a polygon layer made from OS MasterMap Greenspace Layer - Britain’s most comprehensive dataset of urban greenspaces.

Premium Data

sites

This is a polygon layer made from OS MasterMap Sites Layer. Contains the site extents for key sites such as schools, hospitals and train stations and their main access points.

Premium Data

water

This is a line layer made from OS MasterMap Water Network Layer. Contains detailed centre lines following the curve of the waterways precisely, including rivers, streams and canals. OS MasterMap Water Network Layer will become End of Life on 31 March 2026. As of this date, this product will be removed from the OS Vector Tile API.

Premium Data

highways

This is a line layer made from OS MasterMap Highways Network. Contains detailed centre lines for roads, paths and ferry routes and includes the links that connect them.

Premium Data

paths

This is a line layer made from OS Detailed Path Network - a connected path network covering Britain’s National Parks.

Premium Data

Tile Matrix Set

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 zoom levels start at 6 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
Open or Premium

6

1222.992452562495

1:4,622,324.43

Open data

7

611.496226281245

1:2,311,162.22

Open data

8

305.74811314069

1:1,155,581.11

Open data

9

152.874056570279

1:577,790.55

Open data

10

76.4370282852055

1:288,895.28

Open data

11

38.2185141425366

1:144,447.64

Open data

12

19.1092570712683

1:72,223.82

Open data

13

9.55462853563415

1:36,111.91

Open data

14

4.777314267817075

1:18,055.95

Open data

15

2.388657133974685

1:9,027.98

Open data

16

1.19432856698734

1:4,513.99

Premium data

17

0.597164283427525

1:2,256.99

Premium data

18

0.2985821417799085

1:1,128.50

Premium data

19

0.1492910708238085

1:564.25

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 zoom levels start at 0 rather than at 6 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 6.

Zoom level
Resolution
Scale
Open or Premium

0

3584

1:13,545,799.68

Open data

1

1792

1:6,772,899.84

Open data

2

896

1:3,386,449.92

Open data

3

448

1:1,693,224.96

Open data

4

224

1:846,612.48

Open data

5

112

1:423,306.24

Open data

6

56

1:211,653.12

Open data

7

28

1:105,826.56

Open data

8

14

1:52,913.28

Open data

9

7

1:26,456.64

Open data

10

3.5

1:13,228.32

Open data

11

1.75

1:6,614.16

Open data

12

0.875

1:3,307.08

Premium data

13

0.4375

1:1,653.54

Premium data

14

0.21875

1:826.77

Premium data

15

0.109375

1:413.39

Premium data

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