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Where can I download topographical maps?

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Free map data available in 1arcsec and 3arcsec resolution can be found at this site:

http://dds.cr.usgs.gov/srtm/

For example,  maps of the United States of America with a resolution of approx. 100m can be obtained via:
http://dds.cr.usgs.gov/srtm/version1/United_States_1arcsec/

In general, detailed map data can be purchased from many suppliers, e.g.:

http://luxcarta.com/

http://luxcarta.com/product/geodata-for-rf-planning-and-optimization/

https://visicomdata.com/about?lang=en

 

For urban building data we recommend to use the MapInfo format.
For topo/clutter pixel data we recommend to use the ASCII grid format.

Furthermore WinProp supports now the conversion of building vectors in the *.osm format from open street map (http://openstreetmap.org) which are available free of charge, however not every city is completely defined yet.

Edited by mvogel
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