+rogbarn Posted April 19, 2004 Share Posted April 19, 2004 I found an strange situation last Friday. We were on a mini-vacation and stopped in Paris, TN to look for a couple of benchmarks. GD1486 is listed as PARIS EPISCOPAL CHURCH SPIRE, which is certainly there and has been for a long time. It has even been recovered, both in the NGS histories and on GC. The problem is that the coordinates do not point to the church. In fact, they point to the Henry County Courthouse, a couple of hundred feet away. I took readings on all four sides of the courthouse building and they average out very close to the coordinates listed for GD1486. An interesting situation. I have emailed Dave Doyle separately to let him know about this. Quote Link to comment
TerraVador Posted April 20, 2004 Share Posted April 20, 2004 Looks like you are right. Topozone puts those coords on the courthouse. Very odd. Quote Link to comment
+GeckoGeek Posted April 21, 2004 Share Posted April 21, 2004 I wonder if it's a data entry error when the pages were computerized. I forget when that was, but the last official recovery was back in 1971. Quote Link to comment
+happycycler Posted April 21, 2004 Share Posted April 21, 2004 GOOD ONE rogbarn!!! You find the most interesting "stuff"! And the great thing is that you let NGS know so that they can make corrections. Way To Go!! Quote Link to comment
+rogbarn Posted April 22, 2004 Author Share Posted April 22, 2004 NAD 27 vs. WGS 84? Nope. All of the coordinates provided by the NGS are NAD83, if necessary thru automatic update from NAD27. This can be seen in the current survery control and superseded survey control parts of the datasheet. GPSrs are all on WGS84 unless you make a specific effort to change it. Even Topozone defaults to WGS84 now. Put succinctly, the NAD27/WGS84 problem should very rarely be a problem. Quote Link to comment
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