Jason Birch wrote:
Frank, does GDAL support an external .prj file for rasters? I found an email from 2003 where you mentioned that you were "in no immediate danger of implementing such a .prj file fallback feature for all the coordinate-system-less drivers" :)
Jason, That position remains unchanged 5 years later - at least for .prj files. However there is now a generic mechanism to attach metadata like projections for most file formats in an .aux.xml format. I haven't really documented this in detail since it is not intended to be done manually - just programatically.
You're right that MapGuide 2.0+ requires that the coordinate system of the data source matches the coordinate system of the map it is being displayed in. As for creating a coordinate system override, yes this is quite possible. In MapGuide Maestro and in Autodesk MapGuide Studio you do this at the data connection level. In MapGuide Maestro, there is a section called "Coordinate system override". Click on the "Refresh" button to load in the data set's implicit coordinate system. Double-click on the "Default" entry to bring up the override dialogue, and then click on the ellipsis (...) next to "Target" to set the actual coordinate system. In Autodesk MapGuide Studio (2008 at least), there is a section called "Set coordinate system overrides". To use it, click on the "Refresh" button to load the dataset's implicit coordinate system, highlight the default spatial context, and then click on "Edit" to bring up a coordinate system picker.
Excellent info. I have taken the liberty of adding it in: http://trac.osgeo.org/fdo/wiki/FdoGdalNotes Please feel free to correct any inaccuracies I have introduced. It *seems* to me that MapGuide (or Studio or Maestro) should be providing more feedback to the user on why things aren't or won't work. Best regards, -- ---------------------------------------+-------------------------------------- I set the clouds in motion - turn up | Frank Warmerdam, [EMAIL PROTECTED] light and sound - activate the windows | http://pobox.com/~warmerdam and watch the world go round - Rush | President OSGeo, http://osgeo.org _______________________________________________ mapguide-users mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/mapguide-users
