[Qgis-developer] Regarding linear transformation in Georeferencer

[sajid pareeth]

Hi Zortan

Thank you for the reply.

Would be great to know, how this Offsets and scale is calculated from a set
of GCP's.
Any idea?

Regards

Sajid


On Wed, Aug 13, 2014 at 3:30 PM, Siki Zoltan <siki at agt.bme.hu> wrote:

> Dear Sajid,
>
> linear transformation (from my practice) use three unknowns
> offset (Easting, Northing) and scale. No rotational angle.
> The linear is not a good name for it.
> E' = Eoffset + scale * E
> N' = Noffset + scale * N
>
> Zoltan
>
>
>
> On Wed, 13 Aug 2014, sajid pareeth wrote:
>
>  Hi,
>> Can anyone give me hints on statistical background behind linear
>> transformation in Georeferencer plugin?
>>
>> I want to know the formulae used to calculate the residuals while using
>> linear translation.
>> Any related paper/material on which it is developed??
>>
>> Thanks and Regards
>>
>> Sajid
>>
>>
>> --
>> Sajid Pareeth
>> PhD Student
>>
>> http://gis.cri.fmach.it/pareeth/
>>
>> Fondazione Edmund Mach
>> Research and Innovation Centre
>> GIS and Remote Sensing Unit/Limnology and River ecology
>> Via Mach 1, 38010 San Michele all'Adige (TN) - Italy
>> Phone +39 461 615 669
>> spareeth at gmail.com
>> sajid.pareeth at fmach.it
>> skype: spareeth
>>
>>


-- 
Sajid Pareeth

http://gis.cri.fmach.it/pareeth/

Fondazione Edmund Mach
Research and Innovation Centre
GIS and Remote Sensing Unit/Limnology and River ecology
Via Mach 1, 38010 San Michele all'Adige (TN) - Italy
Phone +39 461 615 669
spareeth at gmail.com
sajid.pareeth at fmach.it
skype: spareeth
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