Vector Tiles overview

OS MasterMap Topography Layer is supplied as a national vector tiles set in six MBTiles files (one file per feature type). This is a lightweight set of tiles that is efficient and fast to render in your software, and which provides high-resolution data and gives a seamless experience when zooming in and out. The data is supplied in Web Mercator projection (ESPG:3857).

Vector tiles schema

The vector tiles schema is detailed in the following table. In the zoom levels columns within the table, the letter N indicates that the specified layer and attribute are not mapped within that zoom level, whereas the letter Y indicates that the specified layer and attribute are mapped within that zoom level.

The zoom level is a number that defines how large or small the contents of a vector tiles dataset appear in the viewing pane of a GIS application.

boundary_line layer

AttributeZoom level: 0 to 15Zoom level: 16

toid

N

Y

theme

N

Y

style_code

N

Y

style_description

N

Y

line

N

Y

cartographic_symbol layer

AttributeZoom level: 0 to 15Zoom level: 16

toid

N

Y

theme

N

Y

orientation

N

Y

style_code

N

Y

style_description

N

Y

point

N

Y

cartographic_text layer

AttributeZoom level: 0 to 15Zoom level: 16

toid

N

Y

theme

N

Y

height

N

Y

style_code

N

Y

style_description

N

Y

colour_code

N

Y

font_code

N

Y

rotation

N

Y

geo_x

N

Y

geo_y

N

Y

anchor

N

Y

text_string

N

Y

point

N

Y

topographic_area layer

AttributeZoom level: 0 to 15Zoom level: 16

toid

N

Y

theme

N

Y

style_code

N

Y

style_description

N

Y

polygon

N

Y

topographic_line layer

AttributeZoom level: 0 to 15Zoom level: 16

toid

N

Y

style_code

N

Y

style_description

N

Y

line

N

Y

topographic_point layer

AttributeZoom level: 0 to 15Zoom level: 16

toid

N

Y

theme

N

Y

style_code

N

Y

style_description

N

Y

point

N

Y

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