I'm trying to identify raster cells by location to eventually convert them to vector polygons, and then add them to an existing vector layer. Below is a picture to illustrate the problem.
The green layer is raster and the purple is the polygon. Is it possible to add raster cells that intersect the polygon within a given distance (notice how there are portions of the raster off to the far left that would be problematic if I just converted to a polygon now and then did a union). Ultimately I want to identify areas for a given distance, then be able to convert to vector so I can union it with the existing purple polygon.
Is this possible? Everything I've searched for regarding selection of raster suggests using Zonal Stats - but that's not necessarily what I'm trying to accomplish here. Any suggestions or alternatives?