Change Request
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Default 1m accuracy for null CT assigned before it was understood that NAD83 and/or WGS 84 (Transit) were offset from the geocentre by ~2.2m.Open
Change Request Details
Change Id: 2021.082
Report Date: September 10, 2021
Date Closed: September 10, 2021
Reporter: IOGP
Request: Review NAD83 null and copy transformation accuracy
Comment: Default 1m accuracy for null CT assigned before it was understood that NAD83 and/or WGS 84 (Transit) were offset from the geocentre by ~2.2m.
Action: For transformations 1580, 1690, 1693, 1842, 1708-1750, 15835, 15837 and 15839, changed accuracy from 1m to 2m. For transformation 15931, changed accuracy from 1m to 2m, changed scope and amended remarks. For transformations 1691-92, 1696-97, 1702-03, 15840-41, 15841 and 15864, changed scope.
Tables Affected: Coordinate Operation
Codes Affected: 1580 1690-93 1696 1697 1702 1703 1708-1750 1842 15835 15837 15839-41 15851 15864 15931