# TMS (Tile Map Service)
TMS ([Tile Map Service](https://wiki.osgeo.org/wiki/Tile_Map_Service_Specification)) is an OSGeo standard for tiled geospatial raster data. A TMS “repository” consists of an XML metadata file (usually named tms.xml) and a hierarchy of individual files, each one representing a single raster tile.
TMS contains pre-tiled data, so it is quite fast to load, especially if tiled in a global-geodetic profile. As a simple file hierarchy, TMS is also web-streamable with nothing more than a simple HTTP server.
## TMSImage, TMSElevation
CLASS: TMSImageLayer (inherits from [ImageLayer](image.md))
CLASS: TMSElevationLayer (inherits from [ElevationLayer](elevation.md))
<table border=”1” class=”docutils”> <thead> <tr> <th>Property</th> <th>Description</th> <th>Type</th> <th>Default</th> </tr> </thead> <tbody> <tr> <td>url</td> <td>Location of the metadata file (folder or filename, usually <code>tms.xml</code>)</td> <td>URI</td> <td></td> </tr> </tbody> </table>
### Example
```xml <TMSImage name=”ReadyMap 15m Imagery”>
<url>http://readymap.org/readymap/tiles/1.0.0/7/</url>
</TMSImage>
- <TMSElevation name=”ReadyMap 90m Elevation”>
<url>http://readymap.org/readymap/tiles/1.0.0/116/</url>