[MetaCRS] gsb grids in Proj4js

[Juan Pedro Pérez Alcántara]

Thanks for the reply, Richard. Again, forgive me for being ignorant about
the development process. Will your ticket be part of the official code? Do
you have any idea when it will be accepted? From the time being, we can
cope very well with a 7-parameter datum shifting, but being able to
incorporate the GSB will be definitively a very good point for very precise
applications.

Thanks,
Juan Pedro Pérez Alcántara
Technical Director
jp.alcantara at geographica.gs <alberto.asuero at geographica.gs>
+34 670 786 422
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On Fri, Mar 15, 2013 at 2:41 PM, RICHARD Didier <didier.richard at ign.fr>wrote:

> > Hello everyone,
> >
>
> Hi Juan Pedro,
>
> > I'm new to the list and to Proj4js. I've managed to do 7 parameters
> > transformations between ED50 and ETRS89 (specifically, between EPSG:23030
> > (ED50 UTM30N) and EPSG:25830 (ETRS89 UTM30N) and works like a charm,
> > congratulations to the Proj4js dev team. I was wondering if gsb grids
> > datum
> > shifting is already in the stable trunk. I've seen there is a ticket in
> > TRAC regarding this but, not being completely familiar with TRAC and the
> > development process, I don't know if this support is already in the
> stable
> > trunk. I've seen also that a gsb.js file is added to the definitions.
>
>
> I have not yet committed ticket 81 to truck for the moment. But, i can
> write that it is used in production for our openlayers' based webapp.
>
> > Would
> > you please drop a hint on how this file is created from the original gsb
> > file?
> >
>
> The structure of the gsb grid is detailled in the ticket: (CTABLE
> based). I didnot convert my gsb to this format, but i am sure it can be
> done via a PROJ4 dedicated app.
>
> Regards,
>
> Didier
> > Besides, if the dev team consider it useful, I can provide the 23030 and
> > 25830 EPSG.js definition files for the source trunk, with the
> > transformation parameters applicable for the almost the entirety of the
> > Iberian Peninsula (only the northwest (Galician sector) uses a different
> > set of parameters).
> >
> > Thanks, and keep up with the great work!
> >
> > Regards,
> > Juan Pedro Pérez Alcántara
> > Technical Director
> > jp.alcantara at geographica.gs <alberto.asuero at geographica.gs>
> > +34 670 786 422
> > Rodio 35
> > 41007 Sevilla
> > Spain
> > <
> http://maps.google.es/maps?f=q&source=s_q&hl=es&geocode=&q=rodio+35,+sevilla+espa%C3%B1a&sll=40.396764,-3.713379&sspn=10.787528,19.753418&ie=UTF8&hq=&hnear=Calle+Rodio,+35,+41007+Sevilla,+Andaluc%C3%ADa&t=h&z=16
> >
> > T  +34 954 437 818
> > F  +34 955 110 441
> > Visit our web
> > *www.geographica.gs*
> > <http://www.geographica.gs/>
> > Follow us on Twitter
> > *@Geographica_ST*
> > <https://twitter.com/#%21/Geographica_GS>
> > [image: Twitter] <https://twitter.com/#%21/Geographica_ST>
> > _______________________________________________
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> >
>
>
> --
> RICHARD Didier - Chef du pôle technique du Géoportail
> 2/4, avenue Pasteur - 94165 Saint Mandé Cedex
> Tél : +33 (0) 1 43 98 83 23
>
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