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).
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.
| Attribute | Zoom level: 0 to 15 | Zoom level: 16 |
|---|---|---|
| Attribute | Zoom level: 0 to 15 | Zoom level: 16 |
|---|---|---|
| Attribute | Zoom level: 0 to 15 | Zoom level: 16 |
|---|---|---|
| Attribute | Zoom level: 0 to 15 | Zoom level: 16 |
|---|---|---|
| Attribute | Zoom level: 0 to 15 | Zoom level: 16 |
|---|---|---|
| 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
toid
N
Y
theme
N
Y
orientation
N
Y
style_code
N
Y
style_description
N
Y
point
N
Y
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
toid
N
Y
theme
N
Y
style_code
N
Y
style_description
N
Y
polygon
N
Y
toid
N
Y
style_code
N
Y
style_description
N
Y
line
N
Y
toid
N
Y
theme
N
Y
style_code
N
Y
style_description
N
Y
point
N
Y