A comparative analysis of different DEM interpolation methods

摘要: Visualization of geospatial entities generally entails Digital Elevation Models (DEMs) that are interpolated to establish three dimensional co-ordinates for the entire terrain. The accuracy generated terrain model depends on interpolation mechanism adopted and hence it is needed investigate comparative performance different approaches in this context. General techniques namely Inverse Distance Weighted, kriging, ANUDEM, Nearest Neighbor, Spline have been compared. Differential ground field survey has conducted generate reference DEM as well specific set test points evaluation. We also investigated suitability Shuttle Radar Topographic Mapper Indian by comparing with Survey India (SOI) Model (DEM). Contours were at intervals analysis found SRTM more suitable. sensitivity various methods analyzed study area.