[Gvsig_english] About gvSIG - Unsuported CRS

Fri Oct 19 12:21:43 CEST 2007

Hi Diego,
You are right, Carol don't need to make a datum transformation because both CRSs use the same datum so it's not useful to select a manual transformation. I was wrong.
The problem is that we can't select the correct CRS of the layer beacase gvSIG say "CRS not supported" and "Finalize" button is disabled, so the coordinates conversion is not being done.

Javi.

-----Mensaje original-----
De: gvsig_internacional-bounces at runas.cap.gva.es en nombre de Diego Guerrero Sevilla
Enviado el: vie 19/10/2007 11:14
Para: Users and Developers mailing list
Asunto: Re: [Gvsig_english] About gvSIG - Unsuported CRS

Hi.

In this case it's not necesary to perform a transformation (only a conversion 
operation is performed automatly) because the view CRS and the layer CRS have 
the same Datum (29118,29195,29100,29101 are proyected CRS based on 4291). You 
only need to select CRS for the view  before adding the layers, and to select 
the layer CRS when adding it. 

Bests. Diego.

On Friday 19 October 2007 08:36:12 Javier Carrasco wrote:
> Not exactly.
> When you select one CRS for your view and then add a layer in another CRS,
> gvSIG reprojects the layer to the view CRS. The problem is that at this
> moment transformations are not defined for the projected Brazil CRSs and
> you have to know the transformation parameters to make a manual
> transformation.
>
> Javi.
>
> -----Mensaje original-----
> De: gvsig_internacional-bounces at runas.cap.gva.es en nombre de Carol
> Enviado el: jue 18/10/2007 20:01
> Para: Users and Developers mailing list
> Asunto: Re: [Gvsig_english] About gvSIG - Unsuported CRS
>
> Ok, I understood.
> So, the gvSIG don´t allow that the user CHANGE the projection system,
> neither realize a transformation of coordinates, right?
> At least, not now, ok?
>
> Thanks.
>
> 2007/10/18, Javier Carrasco <jcarrasco at prodevelop.es>:
> > Your shapefiles are not in EPSG 4291 (SAD69 in Lat/Long) but in a
> > projected system (SAD69/UTM or SAD69/Brazil Polyconic with EPSG codes
> > 29118-29195,29100,29101).
> >
> > When you add a layer to a view you have to select (in the combo a the
> > bottom of the form) the CRS of the shapefile. The problem is that at this
> > moment those CRS are not suported. You can select "Manual transformation"
> > in the "Choose reference system" dialog to select the apropiate
> > parameters of transformation if you know those parameters.
> >
> > It will be possible to customize a CRS in the future. You will be able to
> > create your own CRSs, save and use them.
> >
> > Javi
> >
> >
> > -----Mensaje original-----
> > De: gvsig_internacional-bounces at runas.cap.gva.es en nombre de Carol
> > Enviado el: jue 18/10/2007 16:26
> > Para: Users and Developers mailing list
> > Asunto: Re: [Gvsig_english] About gvSIG
> >
> > Yes, I am using EPSG 4291 (SAD69 in Lat/Long).
> > My shapefiles are in this System: SAD69, that is the Oficial System used
> > in
> > Brasil.
> >
> > Carol.
> >
> > 2007/10/18, Javier Carrasco <jcarrasco at prodevelop.es>:
> > > Do you know exactly the EPSG code the shapefile is using?
> > >
> > >
> > > -----Mensaje original-----
> > > De: gvsig_internacional-bounces at runas.cap.gva.es en nombre de Carol
> > > Enviado el: jue 18/10/2007 13:15
> > > Para: Users and Developers mailing list
> > > Asunto: Re: [Gvsig_english] About gvSIG
> > >
> > > Hi, Javi!
> > >
> > > Thanks very much!
> > > I´ve just made this and now it seems that worked, but the coordinates,
> >
> > in
> >
> > > the view, appear in format Lat/Long with the numbers in UTM.
> > > For example:
> > > Lon = 775298º 25´ 58"
> > > Lat = 9024725º 33´ 21"
> > >
> > > Could you help me again??
> > > Thanks,
> > > Carol.
> > >
> > > 2007/10/18, Javier Carrasco <jcarrasco at prodevelop.es>:
> > > >  I think you should change the projection system of the view before
> > >
> > > adding
> > >
> > > > the layers.
> > > > When adding the layers get sure you select the projection system the
> > > > shapefile is using.
> > > >
> > > > I hope it helps.
> > > > Javi
> > > >
> > > >
> > > > -----Mensaje original-----
> > > > De: gvsig_internacional-bounces at runas.cap.gva.es en nombre de Carol
> > > > Enviado el: mié 17/10/2007 14:29
> > > > Para: gvsig_internacional at runas.cap.gva.es
> > > > Asunto: [Gvsig_english] About gvSIG
> > > >
> > > >  Hi!
> > > >
> > > > I am working with gvSIG and I found some problems. Can you help me?
> > > > I am sending you the files.
> > > > The files that are in WORD show the problems when I open one table,
> >
> > for
> >
> > > > example, and when I change the projection system.4291
> > > >
> > > >  The last problem was:
> > > > 1- I added the shapes to create a new view;
> > > > 2- I changed the projection system to SAD69 (projection used in
> >
> > Brazil);
> >
> > > > 3- I got to work in this view normally until I close the project;
> > > > 4- In the next day, when I open my project, the view appeared
> >
> > distorced
> >
> > > as
> > >
> > > > show on the attached file:
> > > >
> > > > I haven´t gotten to discover yet what is this and every time, I have
> >
> > to
> >
> > > > add
> > > > the shapes again.
> > > >
> > > > I hope that you can help me.
> > > >
> > > > Thanks,
> > > > Carol.
> > > >
> > > >
> > > > _______________________________________________
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> > > > Gvsig_internacional at runas.cap.gva.es
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> > >
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-- 
Diego Guerrero Sevilla.

Instituto de Desarrollo Regional.
Universidad de Castilla-La Mancha.

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