[Proj] How to transform between NAD83 HARN/HPGN and WGS84

Richard Greenwood richard.greenwood at gmail.com
Sat Feb 21 09:56:31 EST 2009

On Fri, Feb 20, 2009 at 12:30 PM, Aaron Friesen <aaron at cartopac.com> wrote:
> Thank you all for your initial responses...
> ===== Short follow-up =====
> A short follow-up question for those that don't want to read my
> long-winded follow-up below:
> Do either NADCON or CorpsCon provide datum transforms between a
> given NAD83 and WGS84?  The websites seem to indicate that they
> are only for transforms among various NAD datums and I do not
> know of a NAD83 variant that is truly assumed to be equivalent
> to WGS84/ITRF00.  Please correct me if I am wrong on that.

I consider HTDP - Horizontal Time Dependent Positioning
(http://www.ngs.noaa.gov/TOOLS/Htdp/Htdp.html) to be the authoritative
source for ITRF <-> NAD83 conversions.

Richard Greenwood
richard.greenwood at gmail.com

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