Coordinate determination: GPS
Accuracy: 3rd
GPS method not specified. Should I assume RTK? I don't know what 3rd order accuracy for GPS is. Does anyone have the federal standards for GPS?
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I don't believe the tool used for the job matters in terms accuracy publication. The FGCC standards don't specify equipment, only "Horizontal" and "Vertical".
Here are the horizontal control standards - The State Plane coordinate system in Florida is built so that the accuracy of the projection meets the 1:10,000 before you have to switch zones, so it is possible RTK was used.?ÿ
Table 2.1 - Distance accuracy standards
| Classification | Minimum distance accuracy |
|---|---|
| First-order | 1:100,000 |
| Second-order, class I | 1: 50,000 |
| Second-order, class II | 1: 20,000 |
| Third-order, class I | 1: 10,000 |
| Third-order, class II | 1: 5,000 |
https://www.ngs.noaa.gov/FGCS/tech_pub/1984-stds-specs-geodetic-control-networks.htm
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The orders have more to do with techniques than particular equipment.?ÿ
Thanks! I was just curious to know if the coordinates would be better or worse than your typical boundary corner.
Thanks!
State plane projections were designed so that peojection from geographic introduced distortions of 1:10,000 or less. That is a very different thing than stating a position meets a 1:10k standard. If all work is perfect and minor term corrections are 0, the act of projecting alone may take you to the limit.
Those 1984 standards were written when "geodetic surveying" still meant triangulation networks. GPS was in it's infancy. When standards came out that that were meant to be applied to GPS surveying they abandoned the 1st , 2nd , 3rd order nomenclature. So if somebody is asking a 3rd order GPS survey that person doesn't know what the f... they are talking about.