[ NoAccessorMethod ]
public string url_template { owned get; construct; }
A template for construting the URL to download a tile from.
The template has the following replacements: - "X#": The X coordinate of the tile - "Y#": The Y coordinate of
the tile - "Z#": The zoom level of the tile - "TMSY#": The inverted Y coordinate (i.e. tile numbering starts
with 0 at the bottom, rather than top, of the map)