Transforming NAD27

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Last Post by Skeeter1996 5 years ago

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cturlington

(@cturlington)

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I understand the process involved with transforming using the 2d similarity, or survey grid-ground methods, and I understand that the NAD27 is not a geocentric datum.?ÿ Some references indicate that there are several steps involved with transforming NAD27 to say NAD83 or to ITRF, and a few indicate that it is not possible.?ÿ Does anyone know what the workflow is to transform the NAD27 coordinates to one of the other common coordinate systems, assuming it is possible?

Posted : July 12, 2021 5:17 pm

Norman_Oklahoma

(@norman-oklahoma)

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There is no direct mathematical relationship between '27 and '83 (whatever the flavor). There are tools (NADCON) that will provide approximate shifts, said to be accurate to around +/- 1/2 foot.

Posted : July 12, 2021 5:21 pm