I need help to do a catchment analysis for a 150x100km area in the eastern part of the Peruvian Andes. Please see the attached polygon. Topographic data to use is open source SRTM 30m (1arc) that can be downloaded from various sources online. I can provide topograpic tiles in hgt format.
Final deliverable are shape vector files in WGS84. I will need cathcments are polygons, rivers as polylines and flow direction. The minimum catchment size: 2sqkm