Hi,

I don't actually know much about this library but I had a problem when using robosat where multipolygons were causing a breakdown

I eventually tracked it down to this function in burntiles.py. A multipolygon causes it to crash out due to the case not being handled in the if/elif construct and there is no else statement.

Like I said I don't know much about this library so I don't know if it is possible to make this handle multigeometry types. If not then maybe it should throw a more descriptive error.

Cheers