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An application study of the open source spatial information technology in grassland——Taking the topographical map processing by using GRASS GIS as an example

ZHENG Feng-ling,CHU Shao-lin,REN Yu-ping,Sailike·Douman(Grassland Research Institute of Xinjiang Academy of Animal Science,Xingjiang Urumqi 830000,China)  
GRASS(Geographic Resources Analysis Support System) GIS,a open source spatial information software,was applied in processing the raster data of topographical map in this paper in order to introduce the basic knowledge regarding GRASS GIS and mainly introduced contents were data import,location and coordinate system parameter setting,raster data rectify,data project,data cut and data export.It was proved that the software was proper to process the raster data regarding grassland.
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