[Gvsig_english] About gvSIG - Unsuported CRS

Carol carolschuler at gmail.com
Mon Oct 22 19:27:29 CEST 2007


Sergio, thanks very much.

Greetings,
Carol.



2007/10/22, Sergio Clark <sergio.clark at iver.es>:
>
> Hi Carol,
>
> EPSG are the acronym of European Petroleum Survey Group, which is a
> group created in 1986. Nowadays, it's called Surveying and Positioning
> Committee, and comprises specialists working in areas of surveying,
> geodesy, cartography...
>
> Every pair formed by Reference System+Coordinates System is codificated
> by a number (for example: ED50+UTM huso 30 is EPSG: 23030). In your
> case, 29184 is the EPSG code for SAD69+UTM huso24.
>
> Greetings!
>
> Sergio.
> --
>
> Sergio Clark
> Equipo gvSIG
> IVER T.I., S.A.
> www.iver.es
> www.gvsig.com
>
>
>
>
> Carol escribió:
> > Javier and Diego,
> >
> > I installed the gvSIG version 1.1 in my computer.
> > I got to solve the problem about the projection system: how did you
> > say, I had to create a new view first, change the projection system to
> > the system that my layers are and after this add the layers.
> > My Reference System is in EPSG 29184: SAD69, coordinates UTM, fuso 24.
> > It´s ok now!
> > I would like to know what means EPSG??? Why don´t appear SAD69 in my
> > view instead EPSG???
> >
> > Carol.
> >
> >
> >
> >
> >
> > 2007/10/19, Javier Carrasco <jcarrasco at prodevelop.es
> > <mailto:jcarrasco at prodevelop.es>>:
> >
> >     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
> >     <mailto: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
> >     <mailto: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
> >     <mailto: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
> >     <mailto: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
> >     <mailto: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
> >     <mailto: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
> >     <mailto: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
> >     <mailto: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
> >     <mailto: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.
> >     > > > >
> >     > > > >
> >     > > > > _______________________________________________
> >     > > > > Gvsig_internacional mailing list
> >     > > > > Gvsig_internacional at runas.cap.gva.es
> >     <mailto:Gvsig_internacional at runas.cap.gva.es>
> >     > > > > http://runas.cap.gva.es/mailman/listinfo/gvsig_internacional
> >     > > >
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> >
> >
> >
> >     --
> >     Diego Guerrero Sevilla.
> >
> >     Instituto de Desarrollo Regional.
> >     Universidad de Castilla-La Mancha.
> >
> >     _______________________________________________
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> >
> >
> >
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> >
> >
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