vulture1957 197 Posted March 30 Share Posted March 30 (edited) I found this USGS Gaging Station Reference Mark on an old bridge. I don't see a PID for it. it's at 35° 32' 45" N , 97° 58' 10" W but it doesn't show on the USGS map (National Geodetic Survey Data Explorer (noaa.gov). Am I searching for the wrong thing, or in the wrong place? Edited March 30 by vulture1957 Quote Link to post
Bill93 14 Posted March 30 Share Posted March 30 Don't confuse USGS (US Geological Survey) who made the maps versus the NGS (National Geodetic Survey, formerly called US Coast and Geodetic Survey). NGS maintains the master control network of lat/lon and elevation references. USGS worked off of those and set many additional disks or other marks as needed for mapping and water monitoring. If NGS happened to find a USGS point convenient they may have measured it to their standards and added it to their data base, but that is a minority of USGS marks. USGS never computerized their data sheets, and most are only available from filing cabinets. Quote Link to post
Z15 7 Posted 23 hours ago Share Posted 23 hours ago (edited) Note USGS is an agency in the Dept of the Interior NGS is an agnecy in the Dept of Commerce, Nat'l Oceanic and Atmospheric Administration (NOAA) They have/had different mandate/missions. USGS does NOT publish a lot of their work unless requested. I knew of the USGS guys at a local water level branch as they had a field office in our DOT bldg. They monitored water levels and did stream surveys on those tributary to Lake Michigan and Superior. Their info was office specific and a lot of the data collection has been automated now. Edited 23 hours ago by Z15 Quote Link to post
wister6813 2 Posted 18 hours ago Share Posted 18 hours ago I am curious about the location of this disk. However, the coordinates provided don't appear to be the location of an old bridge, or where a gaging station would be located. These coordinates plot to a location in a field. Quote Link to post
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