USGS 30 ARC-second Global Elevation Data, GTOPO30
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下载链接：
https://data.ucar.edu/dataset/usgs-30-arc-second-global-elevation-data-gtopo30
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资源简介：
GTOPO30 is a global raster digital elevation model (DEM) providing terrain elevation data with a horizontal grid spacing of 30 arc seconds (approximately 1 kilometer). GTOPO30...
