Input data: 1. an SRTM raster. 2. Point file of peaks. -Attributes contain ID, x, y, z and the elevation at which the peak is completely isolated from a neighboring peak.
The output I want is a line/polygon/point/raster file containing contours for that specific elevation of peak-isolation, for all the peaks. Simply put I want to draw a contour at a particular elevation below that peak.
I have reviewed r.contour.level and r.contour.step commands in QGIS's GRASS toolbox, which can give me contours for exactly the elevations I want, but I need contours at different elevations for different peaks, as their elevation of complete isolation would be different.
I could manually do it for every peak I have, but could it be done through raster calculator for all the peaks and at specific elevations?