I'd like to see open-source topo maps with accurate elevation data, and accurate GPS position data. Doesn't seem to exist and 'topographical' and 'GPS data poi

I'd like to see open-source topo maps with accurate elevation data, and accurate GPS position data. Doesn't seem to exist and 'topographical' and 'GPS data points' are not mentioned in this article. For now, individual maps can be obtained via USGS, but they're not stiched together: https://ngmdb.usgs.gov/topoview/ https://ngmdb.usgs.gov/topoview/