In order to calculate land cover diversity within defined patches, I need the coverage proportion of each landcover type for each patch. So I am searching for something similar to the zonal stats tool available for raster-within-polygon calculations.
In contrast to Calculate proportional area of polygon within another layer's polygon, I do not aim to calculate the proportional coverage of single polygons but the total proporional coverage of all polygons representing the same land cover type. Note: land cover types can be represented by more than one polygon within a patch.
The screenshot exemplarily shows two patch-polygons (dotted lines) with land cover polygons (different forest and open land types, each represented by a specific signature). For each patch polygon, I need a summary of proportional coverage of each land cover type.
The screenshot shows just a few land cover types, however there are many more - so I seek an "automatic" solution.