Make use of flopy's support for multipolygons in grid intersection

[bdestombe]

nlmod/nlmod/dims/grid.py

Line 1718 in fc6d4ae

for geom in geoms:

We could remove the for-loop here. The first line in the code below reads a geopandas dataframe with polygons. The second line transforms all polygons into a single multipolygon.

from shapely.ops import unary_union

gdf_mask = gpd.read_file(fp_mask)
multipolygon = unary_union(gdf_mask.geometry)

r = ix.intersect(multipolygon).astype([
    ("icell2d", int),
    ("ixshapes", "O"),
    ("areas", float),
])

[dbrakenhoff]

Note that flopy will support returning the intersection results as a (geo)dataframe in future versions using geo_dataframe=True in the intersect() call or dataframe=True in the intersects() call.

[bdestombe]

#396