Supplies: - Historic USGS Topo Maps - Google Earth - Tea, Coffee, Snax - High brightness screen - P A T I E N C Ehttps://twitter.com/380kmh/status/779691524397395968 …
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Portsmouth NH…the line to Manchester (brown) is a pain in the ass…pic.twitter.com/nndeoao8bU
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Source for most USGS maps: http://docs.unh.edu/nhtopos/nhtopos.htm …
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have you tried Global Mapper? Lots of DEM data to play with
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I think the trial version may give you all the functionality you want
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ooooooo
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