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PANGAEA®Publishing Network for Geoscientific & Environmental Data |
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GTOPO30 |
Data converted to vectors in PanMap layer format, organized in tiles of 20°x20°. Selecting a tile on the map will download a zip-archive which includes all elevation lines. Extraction of the zip-archive will result in PanMap *.lay-files for each contour line. Files are named after the northwest corner of the tile and the elevation.
How to install layers on Macintosh

Reference site http://edcdaac.usgs.gov/gtopo30/gtopo30.html
Data conversion from grid to vector data by
Körsgen, Kantz & Weinelt GbR (kk+w), Kiel, Germany,
kk+w - digital carthography.