Hi On Sat, Nov 19, 2011 at 8:57 PM, John Callahan <[email protected]> wrote: > Does anyone has information on the progress of this ticket? From reading > the comments on the the ticket, it looks as though there are some > possibilities for enhancement. > I use rasters regularly so this issue comes quite often. For one particular > 10GB DEM (in IMG format) it takes 7 or 8 minutes to calculate stats in QGIS, > which takes a while when it happens every time I open that file. Stats have > already been computed through gdalinfo. Thanks for any information. > - John >
This should no longer be an issue with recent changes I made. Please see: http://hub.qgis.org/issues/3735 If you still get the issue, please let me know with detailed steps on how to replicate. Thanks Tim > > > > On Thu, Apr 14, 2011 at 7:24 AM, Radim Blazek <[email protected]> > wrote: >> >> New ticket http://trac.osgeo.org/qgis/ticket/3735 >> >> Radim >> >> On Mon, Mar 21, 2011 at 4:37 PM, John Callahan <[email protected]> >> wrote: >> > I'm not sure if this behavior is expected or I am missing something. >> > >> > I have a 1 band raster dataset (an elevation DEM) in TIF format. It has >> > statistics computed from "gdalinfo -stats mydata.tif" However, when I >> > open >> > it in QGIS (both 1.6 and 1.7 trunk), and look at the Metadata tab in >> > Layer >> > properties, there are two sections that contain band stats information. >> > The >> > first section is labeled "Band 1" and lists the same stats as found >> > using >> > gdalinfo. The second section is labeled "Band" and says "No stats >> > collected >> > yet" for band 1. QGIS has to create the stats when I apply a color map >> > or >> > stretch. For large rasters, this takes a while, and must be done each >> > time >> > it's used in QGIS. >> > >> > Has anyone experienced this behavior? Is this expected? Is there a way >> > to >> > let gdal compute all the stats that QGIS needs? Thanks. >> > >> > - John >> > >> > ************************************************** >> > John Callahan, Research Scientist >> > Delaware Geological Survey, University of Delaware >> > URL: http://www.dgs.udel.edu >> > ************************************************** >> > >> > _______________________________________________ >> > Qgis-user mailing list >> > [email protected] >> > http://lists.osgeo.org/mailman/listinfo/qgis-user >> > >> > > > > _______________________________________________ > Qgis-user mailing list > [email protected] > http://lists.osgeo.org/mailman/listinfo/qgis-user > > -- Tim Sutton - QGIS Project Steering Committee Member (Release Manager) ============================================== Please do not email me off-list with technical support questions. Using the lists will gain more exposure for your issues and the knowledge surrounding your issue will be shared with all. Visit http://linfiniti.com to find out about: * QGIS programming and support services * Mapserver and PostGIS based hosting plans * FOSS Consulting Services Skype: timlinux Irc: timlinux on #qgis at freenode.net ============================================== _______________________________________________ Qgis-user mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/qgis-user
