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    Historic US chart & map collections
    From: Paul Hirose
    Date: 2020 Jan 16, 13:03 -0800

    NOAA has a large collection of historic American nautical and
    aeronautical charts scanned at high resolution. They can be viewed
    online or downloaded.
    
    https://historicalcharts.noaa.gov/
    
    Topographic maps in the US have been the responsibility of another
    agency, the US Geological Survey. They too have an archive of historic maps:
    
    https://www.usgs.gov/core-science-systems/national-geospatial-program/topographic-maps
    
    Your search can specify the desired scale, but if you choose 1:24000
    that excludes most of the old stuff, which was generally at smaller scale.
    
    The modern equivalent is "US Topo." These are separate quadrangles, just
    like the legacy paper maps. However, the publication cycle is much more
    frequent. They are not as artistic as the old topos, which were
    handmade. That shows especially in the lettering. Automation does not
    equal human judgement in that respect.
    
    One bonus is the orthophotograph included in the US Topo PDF. This is an
    aerial photograph which has been rectified to make the image coincide
    with the map projection. In other words, it's not the perspective view
    recorded by the camera. Depending on your PDF viewer the presence of the
    orthophoto may not be obvious. You have to select it from the list of
    "layers."
    
    If you just need to view the most recent map online, the seamless
    National Map is most convenient, especially if your point of interest is
    near a quadrangle boundary. Both the National Map and US Topo are
    accessible from the above link.
    

       
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