I have 1) a file with all the residential buildings in a small municipality and 2) a file with all the surrounding green areas.
I'm having a hard time solving this because the residential buildings are so many that doing a buffer for individual buildings produces way too many overlapping circles. In spite of this, I tried following this tutorial Percentage of polygon in one shapefile within polygon of another . I used the overlap analysis and set the green areas as input layer, and the 3km buffer around residential buildings as the overlay layer. But in the attribute table the analysis returns a column with the area percentage where all the values are 99 or 100. Which makes me think that the analysis isn't performed on each individual buffered circle, but on the whole shape instead. I tried the other way around as well (buffer layer as input and green areas as overlay) but the percentage values it returns are very small and none larger than 49%, which can't be right either.
I have also tried performing a 3km buffer on the green areas and see which buildings it intersects with but that doesn't give the full picture since there are other buildings that have access to less than 100% of the green area within 3km.
Anyone have any tips on how I should actually go about this?