Merge pull request #1100 from osm-americana/zlw-tileserver-details

Update documentation to reflect tileserver hosting by OSM US

README.md

@@ -84,4 +84,4 @@ We are hoping that it will support more countries; you can [help us](https://git
 
 ## Tile Server
 
-Although the source code in this repository is dedicated to the public domain under a CC0 waiver, it is configured by default to load map tiles from a privately-donated community [tile server](https://tile.ourmap.us). This server is available for use by other hobbyist and community projects with constraints. See the [tile server usage policy](TILE_USAGE.md) for more details. This usage policy describes the allowable usage of the tiles for other projects, separate from this style or the application being developed in this repository.
+Although the source code in this repository is dedicated to the public domain under a CC0 waiver, it is configured by default to load map tiles from an [OpenStreetMap US](https://www.openstreetmap.us/) hosted community [tile server](https://tile.ourmap.us). OpenStreetMap US, the local chapter for OpenStreetMap in the United States, makes this server available for use by other hobbyist and community projects with constraints. See the [tile server usage policy](https://tile.ourmap.us/usage.html) for more details. This usage policy describes the allowable usage of the tiles for other projects, separate from this style or the application being developed in this repository.