Feature request: more geometry options for zonal

[danscr]

Currently, geometry in zonal considers cells where center, the whole or part of the cell are contained within another geometry. For polygon data, it would be quite useful to calculate the fraction of overlap between cell and polygon to compute statistics.

[rafaqz]

You could do this manually in a loop over each polygon using coverage.

But yes it would be nice to automate that process. We can just call coverage instead of boolmask internally and multiple by coverage rather than masking.

Maybe with a separate coverage=true keyword? To show that it's quite different to choosing a boundary?