4FLORINSKY I V. Accuracy of Local Topographic Variables Derived from Digital Elevation Models[J]. Int J Geographical Information Science, 1998, 12(1): 47-61.
5CHANG K, TSAI B. The Effect of DEM Resolution on Slope and Aspect Mapping [J]. Cartography and Geographic Information Systems, 1991, (18): 69-77.
6CARTER J. The Effect of Data Precision on the Calculation of Slope and Aspect Using Gridded DEMs[J]. Cartographica, 1992,29(1): 22-34.
7DAVIS F W, DOZIER J. Information Analysis of a Spatial Database for Ecological Land Classification[J]. Photogrammetric Engineering and Remote Sensing, 1990,(56): 605-613.
8SHARPNACK D A, AKIN G. An Algorithm for Computing Slope and Aspect from Elevations[J]. Photogrammetric Survey, 1969, (35): 247-248.
9BAND L E. Topographic Partition of Watershed with Digital Elevation Models[J]. Water Resources Research,1986,22(1): 15-24.
10DESMET P J J, GOVERS G. Comparison of Routing Algorithms for Digital Elevation Models and Their Implication for Predicting Ephemeral Gullies[J]. International Journal of Geographical Information Science,1996, 10(10): 311-331.
