Arnold Colom (1656)
26 years before the founding of Philadelphia.
Always amazing how accurate they were without satellite technology.
Nantucket is a little off, but the coast costline is really good.
How did they chart these?
Trigonometry, astronomy, and very careful observations/notations on those observations
Trigonometry, astronomy, and very careful observations/notations on those observations
NOAA 2020 nautical raster chart with the GeoGarage platform
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