[Proj] Understanding 2D Helmert

[Andre Joost]

Am 26.10.18 um 17:37 schrieb Even Rouault:
> On vendredi 26 octobre 2018 14:40:17 CEST Kristian Evers wrote:
>> If that is the case it should just be a matter of changing the
>> type of the output units internally in the operation. If you
>> submit a new ticket on the github page with a short description
>> I'll take a look at it within the next couple of days.
>
> Things are fine. This is just that using 'proj' for such operation is
> inapproprate. You should use the new 'cct' binary.
>

Thanks, that worked for me in this way:

cct -z 0 +proj=helmert +convention=coordinate_frame +x=239228.435 
+y=6693404.951 +s=1.0003267 +theta=18795.4443 <HelmertIn.txt 
 >>HelmertOut.txt

Maybe this example should be added to the Helmert and/or cct man pages.

Greetings,
Andre Joost