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Effect of Horizontal Resolution of Raster DEM on Landform Information

Ning Mao-qi

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Abstract

Digital Elevation Model(DEM) is the main data source of analysis.The effects of different grid cell sizes of raster DEM on morphologic factors data are evaluated.Using DEM with 6 different horizontal resolutions,basic parameter included slope and aspect are extracted and derived.According to the result,grid size affects the accuracy of derived information,especially in the flat areas.We should choose the DEM with right resolution.

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What this paper is about

Digital Elevation Model(DEM) is the main data source of analysis.The effects of different grid cell sizes of raster DEM on morphologic factors data are evaluated.Using DEM with 6 different horizontal resolutions,basic parameter included slope and aspect are extracted and derived.According to the result,grid size affects the accuracy of derived information,especially in the flat areas.We should choose the DEM with right resolution.

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Available abstract

Digital Elevation Model(DEM) is the main data source of analysis.The effects of different grid cell sizes of raster DEM on morphologic factors data are evaluated.Using DEM with 6 different horizontal resolutions,basic parameter included slope and aspect are extracted and derived.According to the result,grid size affects the accuracy of derived information,especially in the flat areas.We should choose the DEM with right resolution.

Key concepts: Digital elevation model, Raster graphics, Landform, Raster data, Geology, Grid, Grid cell, Elevation (ballistics)

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