[Proj] problem in transform 32719 to 24879

[Jose Gonçalves]

Patricio

The problem is that you don't have a datum transformation for the second
coordinate system. You should have something like:

.... +to +proj=utm +zone=19 +south +ellps=intl +units=m +no_defs
+towgs84=-288,175,-376

I got these parameters from ArcGIS. There are several other sets of datum
parameters, probably more adequate for different areas.

Regards

José A. Gonçalves







2011/1/24 Patricio Cifuentes Ithal <pcifuentes at siigsa.cl>

> Hi list!,
>
> I’ have a problem,  I’ need transforrm one point  of projection 32719to
> 24879,
>
>
>
> Point 32719
>
> 362802.140         7955337.740
>
>
>
> Example:
>
>
>
> cs2cs +proj=utm +zone=19 +south +ellps=WGS84 +datum=WGS84 +units=m +no_defs
> +to +proj=utm +zone=19 +south +ellps=intl +units=m +no_defs
>
> 362802.140      7955337.740
>
> 362796.55       7955312.55 0.00 (is incorrect!!)
>
>
>
>
>
> The real transform is
>
> 362996.74417800002      7955670.922740000
>
>
>
> Why not transform correctly? I missing something?
>
>
>
>
>
>
>
> *Patricio Cifuentes Ithal*
>
> Ingeniero en Informática
>
> Unidad de Informática
>
> Fono : 02 - 334 73 69
>
> www.siigsa.cl
>
>
>
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