# [Proj] problem in transform 32719 to 24879

Patricio Cifuentes Ithal pcifuentes at siigsa.cl
Tue Jan 25 14:55:41 EST 2011

```José,

Exactly!!!

Thanks for the help!

Patricio Cifuentes Ithal

Ingeniero en Informática

Fono : 02 - 334 73 69

www.siigsa.cl

De: Jose Gonçalves [mailto:jagoncal at gmail.com]
Enviado el: lunes, 24 de enero de 2011 13:08
Para: pcifuentes at siigsa.cl; PROJ.4 and general Projections Discussions
Asunto: Re: [Proj] problem in transform 32719 to 24879

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

Fono : 02 - 334 73 69

www.siigsa.cl

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