Papa-Bear-NYC Posted January 31, 2008 Share Posted January 31, 2008 I have been reading through several of the old triangulation reports that have recently come on-line as USC&GS Special Publications. One of my favorites is Special Publication No. 46 "Triangulation of Maine 1918". Maine is a favorite vacation destination, hiking destination and benchmark hunting destination. In several of the charts at the end of the document, there are references to United States Cost and Geodetic Survey Charts. Here is an example Figure 8 "TRIANGULATION, PASSAMAQUODDY BAY TO GRAND MANAN CHANNEL" refers to "United States Cost and Geodetic Survey Chart No. 101" I saw a copy (I think) of that chart on the wall of the old Quoddy Coast Guard Station (now a lodging) and would love to get a copy. Are any of these old charts on-line like the special publications or is there any other means to obtain copies from library or archive copies? These would be quite a treasure. Thanks Quote Link to comment
NGS Surveyor Posted February 25, 2008 Share Posted February 25, 2008 There are many of the old USC&GS nautical charts on-line, see: http://nauticalcharts.noaa.gov/csdl/ctp/status.htm . Also, many of the old USC&GS Annual Reports (c1850 - 1950) contain progress sketches, some of which are copies of nautical charts (on thin paper), see: http://docs.lib.noaa.gov/rescue/cgs/data_r...al_reports.html. The charts and sketches attached to these Reports have not yet been scanned. However, these Reports, and sometimes charts separately, are frequently listed on on-line auction sites. Charts along the coast line were used as base maps for triangulation diagrams. GeorgeL NGS Quote Link to comment
Papa-Bear-NYC Posted February 26, 2008 Author Share Posted February 26, 2008 There are many of the old USC&GS nautical charts on-line, see: http://nauticalcharts.noaa.gov/csdl/ctp/status.htm . Also, many of the old USC&GS Annual Reports (c1850 - 1950) contain progress sketches, some of which are copies of nautical charts (on thin paper), see: http://docs.lib.noaa.gov/rescue/cgs/data_r...al_reports.html. The charts and sketches attached to these Reports have not yet been scanned. However, these Reports, and sometimes charts separately, are frequently listed on on-line auction sites. Charts along the coast line were used as base maps for triangulation diagrams. GeorgeL NGS Thanks George I checked that out. Tons of charts but unfortunately all the Maine charts were nautical. What I saw at that old Coast Guard station at West Quoddy Head station was more like a triangulation base map. Sort of like the sketch I pasted in my note above from Special Publication No. 46, but a much more finished version. Probably published for the public or at least for the surveying profession. I'll keep looking for sources. Quote Link to comment
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