Salve. Sempre a proposito di CRS e datum, segnalo questo interessante thread. Comments welcome. Saluti.
-------- Messaggio originale -------- Oggetto: Re: [postgis-users] Question on datum names Data: Wed, 30 May 2012 00:47:43 +0200 Mittente: Peter Baumann <p.baum...@jacobs-university.de> Rispondi-a: PostGIS Users Discussion <postgis-us...@postgis.refractions.net> Organizzazione: Jacobs University Bremen A: PostGIS Users Discussion <postgis-us...@postgis.refractions.net> Peter- in OGC (www.opengeospatial.org) we are just about to establish a standard for such conventions in a machine-readable way. This is a so-called "CRS Name Type Specification" defines URLs as identifiers for CRSs and CRS axes for now. More ingredients, such as datums, probably will follow in future. This standard will allow for a uniform, interoperable addressing scheme. If you are interested I can post some preliminary information. The candidate OGC CRS resolver, SECORE, is in beta accessible at http://www.earthlook.org/ -> demos -> CRS resolver. It is Open Source as part of the array analytics server, rasdaman (www.rasdaman.org). cheers, Peter On 05/29/2012 11:45 PM, Peter N. Schweitzer wrote: > On the web site from which I distribute spatial data, I provide shapefiles > with projection information as a .prj file. I've drawn the contents of > these prj files from the srtext field of the spatial_ref_sys table. > > A user has pointed out to me that this is inconvenient for people running > ArcGIS because ArcGIS expects to see different values as the name of the > coordinate system and the datum. I have not seen a standard that specifies > these names. Is there one? > > It looks like I could change my .prj files to fit ArcGIS without much trouble. > But would this change break other applications? Are there GIS applications > other than ArcGIS that rely strongly on these names? How do others support > portability of projection information in downloadable data using the shapefile > format? > > Peter -- Dr. Peter Baumann - Professor of Computer Science, Jacobs University Bremen www.faculty.jacobs-university.de/pbaumann mail: p.baum...@jacobs-university.de tel: +49-421-200-3178, fax: +49-421-200-493178 - Executive Director, rasdaman GmbH Bremen (HRB 26793) www.rasdaman.com, mail: baum...@rasdaman.com tel: 0800-rasdaman, fax: 0800-rasdafax, mobile: +49-173-5837882 "Si forte in alienas manus oberraverit hec peregrina epistola incertis ventis dimissa, sed Deo commendata, precamur ut ei reddatur cui soli destinata, nec preripiat quisquam non sibi parata." (mail disclaimer, AD 1083) _______________________________________________ postgis-users mailing list postgis-us...@postgis.refractions.net http://postgis.refractions.net/mailman/listinfo/postgis-users _______________________________________________ Gfoss@lists.gfoss.it http://lists.gfoss.it/cgi-bin/mailman/listinfo/gfoss Questa e' una lista di discussione pubblica aperta a tutti. Non inviate messaggi commerciali. I messaggi di questa lista non rispecchiano necessariamente le posizioni dell'Associazione GFOSS.it. 584 iscritti al 7.4.2012
