#3283: insurance, gpxz
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insurance
Sanborn Map Company produced detailed, block-by-block maps of all U.S. cities between 1870 and 1960, which can now be consulted georeferenced.
https://mapsnap.org/ -
gpxz
GPXZ aims to improve access to high-quality open elevation data, with a limited free option to access the API.
https://www.gpxz.io/
Raf