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Table 3 Computed deviations (in %) of the respective parameter-wise values for each dataset from those of the surveyed toposheet values

From: Evaluation of different digital elevation models for analyzing drainage morphometric parameters in a mountainous terrain: a case study of the Supin–Upper Tons Basin, Indian Himalayas

Morphometric parameters V-T50A Amount of deviation of parameter values of respective datasets from T50A values (%)
   SRTM DEM (90 m) (S90) ASTER GDEM (30 m) (A30) Cartosat-1 DEM (30 m) (C30) Topographical map (1:250,000) (T250A) Topographical map (1:50,000) (T50A) ASTER GDEM (resampled 90 m) (A90) Cartosat-1 DEM (resampled 90 m) (C90)
Catchment size properties         
Basin Area (sq km) 973.40 +0.29 +0.41 −0.27 −1.87 0 +22.97 +22.05
Basin perimeter (km) 169.20 +27.01 +5.79 +11.41 −2.54 0 +11.52 +13.42
Basin length (km) 52.65 −0.04 +0.38 −0.28 −1.92 0 +3.13 +1.61
Main channel length (m) 62.54 −7.48 −3.47 −3.45 +0.59 0 +17.29 +12.36
Total channel length (km) 1733.40 +14.46 +116.96 +126.24 −17.22 0 +30.64 +34.64
Total no. of stream segments 1379 +78.17 +502.90 +462.95 −0.22 0 +84.34 +78.90
Relief attributes         
Maximum relief (m) 6317 −0.16 −0.52 −6.74 +0.54 0 −1.00 −6.89
Minimum relief (m) 1302 −2.07 −1.54 −5.61 +3.15 0 +0.31 −4.15
Mean relief (m) 3931.33 −4.81 +0.20 −1.43 −4.28 0 −0.04 −1.70
Relative relief (m) 5015 +0.34 −0.26 −7.04 −0.14 0 −1.34 −7.60
Relief ratio 95.61 0 −1.00 −7.12 +2.04 0 −4.70 −9.40
Hypsometric integral 0.52 +1.92 +1.92 +7.69 −5.77 0 +1.92 +7.69
Surface attributes         
Maximum slope (degrees) 69.25 +5.04 +20.95 +19.99 −11.58 0 +1.17 −5.40
Mean slope (degrees) 26.24 +8.003 +14.558 +11.17 −22.98 0 −5.72 −14.02
Shape properties         
Circularity ratio 0.27 0 +40.74 +25.23 +62.96 0 +55.56 +51.83
Elongation ratio 0.67 0 0 0 +1.49 0 +7.46 +8.96
Drainage textural parameters         
Bifurcation ratio +4.24 +8.02 +4.01 +1.65 +14.38 0 +11.32 +7.54
  1. V-T50A values from the DEM derived from topographical maps of scale 1:50,000