I have two polygon layers, 'model' and 'ntem', whose features overlap and intersect one another.
I would like to calculate the proportion of the area of the 'model' polygons which fit within each 'ntem' polygon. Some 'model' features fully fit within 'ntem' features, others overlap multiple 'ntem' features. Both layers are in CRS OSGB:1936.
For example, 'model' feature 50209 falls partly in each of the three 'ntem' features 2202, 2205, 2206 and I'd eventually like to know the proportion of 50209's area in each 'ntem' area.
From initial research, I understand that the
Vector > Geoprocessing Tools > Intersect function should do what I want, however I get a completely blank layer of results when I attempt this. (shapefile is created, empty attribute table, no features!)
Can anyone either point out if I am doing something wrong and suggest an alternative method of achieving the area proportion calculation?