[Qgis-user] Helmert 7 param transformation

[Zoran Jankovic]

Hi guys,

Thanks for all the help! I found some really useful apps via the links you
all sent.

On a side note, I was aware that Helmerts transformation is very well
documented, just am little pressed for time right now to develop an Excel
sheet on my own (my exam is on Thursday :-) ).

Here is what I found (in case someone else will be looking for (free)
transformation software:
http://www.apsalin.com/online.aspx
<http://www.apsalin.com/online.aspx>
http://www.fgg.uni-lj.si/~/mkuhar/Pouk/Utils.html (this one is in Slovenian,
but the Excel files are in English themselves, only the file names are in
Slovenian).

Best regards,
---
Zoran Jankovic
ZIS-Izrada softvera i savjetovanje / ZIS - Software Development and
Consulting

http://www.zisis.hr

M: 00 385 98 682 902
T:  00 385 44 683 374

A. Senoe 4
44320 Kutina
Croatia


On Tue, Sep 14, 2010 at 2:28 PM, Gerry Creager <gerry.creager at tamu.edu>wrote:

> 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
> Office: 1700 Research Parkway Ste 160, TAMU, College Station, TX 77843
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.osgeo.org/pipermail/qgis-user/attachments/20100914/e5dd4ab8/attachment.html>