Godot OpenStreetMap TileMap

Main class OsmTileMap is the modified TileMap. It use X HTTPRequest to request X tiles from OpenStreetMap

OpenStreetMap tiles are available at URL like https://a.tile.openstreetmap.org/5/13/8.png

More details on OpenStreetMap Wiki: https://wiki.openstreetmap.org/wiki/Main_Page About OpenStreetMap Tiles Wiki page : https://wiki.openstreetmap.org/wiki/Tiles

Changing latitude/longitude and zoom

You can use properties from the tilemap directly in Inspector. Zoom is from 0 to 19. It will reload the map area in editor.

Base Url property is for changing tiles styles. See below.

Tile Material is property to set a shader on all tiles. SampleShaderMaterial.tres is a sample.

Using differents map styles

Source: https://wiki.openstreetmap.org/wiki/Tiles

You can use different map style from the wiki.

Example: Change the "Base Url" from https://a.tile.openstreetmap.org to http://a.tile.stamen.com/toner

Samples Coordinates

• New York : 40.7893, -73.9619
• Mediterranean 40.5335, 4.8412
• France : 46.7294, 2.5626

Computing X/Y from Longitude/Latitude

Source: https://wiki.openstreetmap.org/wiki/Slippy_map_tilenames

To compute tiles coordinate on OpenStreetMap, we need to use some maths:

	n = 2 ^ zoom
	xtile = n * ((lon_deg + 180) / 360)
	ytile = n * (1 - (log(tan(lat_rad) + sec(lat_rad)) / π)) / 2