I am attempting to perform a proximity analysis to determine the distance pixel values on different rasters layers. For example, one layer is roads (with all roads having a value of 1) and one is oil wells (with all wells having a value of 1). I would eventually like to overlay all of the results to see which activities are in closest proximity, how close they are, and which general area within my analysis experiences the most pressure. What is the best way to go about this? Should I perform proximity analyses for each separate layer and then use the raster calculator to combine them?
I am using QGIS and am not too sure how to identify the "target pixel" within the GDAL proximity tool.