# Vector tiles overview

OS MasterMap Greenspace Layer is supplied as a national vector tiles set in a single MBTiles file. 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 <a href="#id-7.1-vector-tiles-schema" id="id-7.1-vector-tiles-schema"></a>

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.

### Greenspace\_area attributes

<table><thead><tr><th width="205">Attribute</th><th width="192">Zoom Levels: 0 to 12</th><th>13</th><th>14</th><th>15</th><th>16</th></tr></thead><tbody><tr><td>toid</td><td>N</td><td>Y</td><td>Y</td><td>Y</td><td>Y</td></tr><tr><td>primary_function</td><td>N</td><td>Y</td><td>Y</td><td>Y</td><td>Y</td></tr><tr><td>polygon</td><td>N</td><td>Y</td><td>Y</td><td>Y</td><td>Y</td></tr></tbody></table>