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

Attribute	Zoom level: 0 to 15	Zoom level: 16
toid	N	Y
theme	N	Y
style_code	N	Y
style_description	N	Y
line	N	Y

cartographic_symbol layer

Attribute	Zoom level: 0 to 15	Zoom 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

Attribute	Zoom level: 0 to 15	Zoom 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

Attribute	Zoom level: 0 to 15	Zoom level: 16
toid	N	Y
theme	N	Y
style_code	N	Y
style_description	N	Y
polygon	N	Y

topographic_line layer

Attribute	Zoom level: 0 to 15	Zoom level: 16
toid	N	Y
style_code	N	Y
style_description	N	Y
line	N	Y

topographic_point layer

Attribute	Zoom level: 0 to 15	Zoom level: 16
toid	N	Y
theme	N	Y
style_code	N	Y
style_description	N	Y
point	N	Y