Selling 3D Bronze Topography Maps: Idea Generation and Market Validation (gregkamradt.com)

3 points by gkamradt 6y ago ↗ HN

2 comments

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c30change 6y ago ↗

Interesting. Where do you get the elevation data?

gkamradt 6y ago ↗

Via USGS https://viewer.nationalmap.gov/basic/