RE: [mapguide-users] GDAL Provider and Image Catalogs?

[Milan Lazecky]

Hi.
This page http://trac.osgeo.org/fdo/wiki/FdoGdalNotes is really something. However - it doesn't work for me.
I tried to play a lot with the rasterconfig.php - but when using it, I always get this error:
Invalid repository type. Exception occured in method MgResourceIdentifier.ParsePathname at line 509 in file ......\Services/ResourceIdentifier.cpp
I don't understand why I get this error - can you help me please?
I am sure I put a valid path to the raster filename.
Thanks in advance.
Milan


> ------------ Původní zpráva ------------
> Od: Andy Morsell <amorsell at spatialgis.com>
> Předmět: RE: [mapguide-users] GDAL Provider and Image Catalogs?
> Datum: 23.1.2008 18:31:12
> ----------------------------------------
> Shreepad,
> Much of this was resolved for me with the ability to use tile index config
> files with FDO 3.2.3 and MGOS 1.2.  See this page for information on
> Creating Tile Index Config Files -
> http://trac.osgeo.org/fdo/wiki/FdoGdalNotes.  There are still some
> performance issues, but this has made it usable for me in the instance I
> described below.  However, I have not attempted to use raster as a base
> layer in this case since performance without them was acceptable, so I'm not
> sure if those issues still exist.
> 
> 
> Andy Morsell, P.E.
> Spatial Integrators, Inc.
> http://www.SpatialGIS.com
> 
> -----Original Message-----
> From: mapguide-users-bounces at lists.osgeo.org
> [mailto:mapguide-users-bounces at lists.osgeo.org] On Behalf Of shreepad
> Sent: Tuesday, January 22, 2008 11:09 PM
> To: mapguide-users at lists.osgeo.org
> Subject: Re: [mapguide-users] GDAL Provider and Image Catalogs?
> 
> 
> Hi
> i have a exactly same problem. GDAL does not work at all it gives me all
> kinds of crashes and with mrsid files its really slow. With tiff images in
> one folder it crashes MGOS 
> 
> 
> Please advice 
> 
> shreepad
> 
> 
> 
> Andy Morsell wrote:
> > 
> > Hi,
> > This is mostly directed at Frank and other FDO folks.  I am needing to
> > implement MGOS for a client using some publicly available aerial photos
> > which we plan to expose via base layers and then pre-render via a tile
> > rendering script.  In this case, there are approximately 1300 MrSID images
> > that make up a County worth of data.  The maximum image size is 3 MB. 
> > When
> > defining a data connection using the GDAL FDO provider that points to this
> > folder, I do not have favorable results.  I can repeatedly get MapGuide
> > Server to crash while this layer is rendered and the crashes occur during
> > the GDAL reads of the images, but never while reading the same image and
> > never with very meaningful debug information.  This is using MGOS 1.1.0
> > and
> > FDO 3.1 since 1.2.0 beta 1 currently does not work with the single
> > threaded
> > GDAL provider.  Along those lines, it's a shame to see a quad processor
> > server utilizing only 25% of its potential horsepower because of single
> > threading..
> > 
> > While watching what is happening while running MapGuide Server in
> > interactive and debug mode, it is apparent that the GDAL provider tries to
> > open every image in the data connection folder for each map render.  This
> > happens even if the current view is zoomed to a level where only 4 images
> > need to be opened.  This is obviously very inefficient and probably part
> > of
> > the crashing problem.  A solution to this would be to use an image tile
> > catalog index so that only the images needed for the view are accessed.
> > 
> > I see that there was some talk on this subject, mostly in the FDO mailing
> > list, back in January.  But, has this moved forward at all and can we
> > expect
> > to see image catalogs supported by they GDAL provider in the near future?
> > If so, when?
> > 
> > By the way, I started using FWTools to attempt to mosaic these images, but
> > quickly discovered that a resultant Erdas image would have been in the 200
> > GB range.
> > 
> > Thanks for any insight into these matters.
> > 
> > Andy Morsell, P.E.
> > Spatial Integrators, Inc.
> > http://www.SpatialGIS.com
> > 
> > 
> > _______________________________________________
> > mapguide-users mailing list
> > mapguide-users at lists.osgeo.org
> > http://lists.osgeo.org/mailman/listinfo/mapguide-users
> > 
> > 
> 
> -- 
> View this message in context:
> http://www.nabble.com/GDAL-Provider-and-Image-Catalogs--tp10175109s16610p150
> 36054.html
> Sent from the MapGuide Users mailing list archive at Nabble.com.
> 
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