Tuesday, June 20, 2017

First nautical chart designed for bathymetric navigation

In 1939, Coast Survey published the first chart designed for bathymetric navigation.
Chart 5101A uses 50-fathom depth curves and fewer numerical depths.
The resulting product brings out steep slopes and broad plateaus of the bottom topography

zoom on chart 18740 nautical raster chart in the GeoGarage platform

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