[Qgis-user] Helmert 7 param transformation

[Gerry Creager]

I sent this to ZOran directly, but for others who might be interested, 
this site has a lot of useful geodesy tools:  http://www.ngs.noaa.gov/TOOLS/

I've been a happy user for years.

gerry

Zoran Jankovic wrote:
> Hi guys and girls,
> I sent this message once before, but I do not think it got through, so 
> I'm reposting.
> 
> I know this is slightly off topic, but I ran out of places to ask... I'm 
> looking for a piece of software, it could be a standalone app, or some 
> JavaScript somewhere, that can calculate the 7 parameters of Helmerts 
> transformation from the coordinates of identical points. Lots of 
> applications can transform CRS, even on the fly, but I need something to 
> calculate the parameters...
> 
> The thing is I'm preparing for an exam, this is like a bar exam so I can 
> get to be a certified surveying engineer, and one of the questions is to 
> calculate the params. A decade ago, when I was a student, I had the 
> formulas in a Sharp programmable calculator (that I borrowed :-)). Alas, 
> both the knowledge, as well as the programmable calculator got 
> lost somewhere over the years :-)
-- 
Gerry Creager -- gerry.creager at tamu.edu
Texas Mesonet -- AATLT, Texas A&M University
Cell: 979.229.5301 Office: 979.458.4020 FAX: 979.862.3983
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