Custom tile size

[VincentVerelst]

@kvantricht , there was already an option in GFMap to set a custom tile_size when loading in collections, so I've just added an optional argument in worldcereal_preprocessed_inputs_gfmap to set a tilesize

[kvantricht]

Isn't it safer to explicitly state if tile_size is not None instead of doing a boolean evaluation?

[VincentVerelst]

Isn't it safer to explicitly state if tile_size is not None instead of doing a boolean evaluation?

aha yes, thanks for the suggestion! changes have been made

[kvantricht]

Great, thanks!