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![3-D view of portion of Portland Harbor showing soundings overlayed over coloreddepth ranges theb4117.jpg 3-D view of portion of Portland Harbor showing soundings overlayed over coloreddepth ranges](/sites/default/files/styles/max_1300x1300/https/s3.amazonaws.com/s3-east-testmedia-noaa.woc.noaa.gov/dam/Photos/legacy/pl23_theb4117.jpg?itok=matH2HwY)
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https://www.noaa.gov/media/digital-library-photo/pl23theb4117jpgDescription
3-D view of portion of Portland Harbor showing soundings overlayed over coloreddepth ranges.
Location
Maine, Portland
Collection
Historic Coast & Geodetic Survey