Optional per-tile properties, indexed by the relative ID as a string.
Note: The ID is not the same as the GID. The ID is calculated relative to the
firstgid of the tileset the tile belongs to.
For example, if a tile has GID 25 and belongs to the tileset with firstgid = 10, then its
properties are given by tileset.tileproperties["15"].
A tile with no special properties will not have an index here.
If no tiles have special properties, this field is not populated at all.
Optional per-tile properties, indexed by the relative ID as a string.
Note: The ID is not the same as the GID. The ID is calculated relative to the firstgid of the tileset the tile belongs to. For example, if a tile has GID 25 and belongs to the tileset with firstgid = 10, then its properties are given by tileset.tileproperties["15"].
A tile with no special properties will not have an index here. If no tiles have special properties, this field is not populated at all.