In this paper some applications of
ArcMap are used to extract the drainage network based on
DEM for the study area. Two DEMs (SPOT 5 and SRTM)
data have been used. Accuracy assessment of used DEMs
has been investigated by using check points, their elevations
are collected by GPS observations. SPOT data are more accurate
and dense flow network for the study area. The study area
has 75 residential zones.