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</o:shapelayout></xml><![endif]--></head><body lang=PT link=blue vlink=purple><div class=WordSection1><p class=MsoNormal>Hi Qgisers!<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><span lang=EN-US>One question: how to get a fast raster catalog in QGIS with a big number of rasters in it? (in this case 400 ecw)<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>I am having trouble getting this to work… I tried a vrt catalog and qgis just hangs when I load it.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>Reducing the number of images makes it ok.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>Is this a know limitation of gdal/qgis? Is there another approach to catalogs (not mosaics)?<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>What is the recommended approach to see a large number of images in QGIS when working at big scales (zoomed in)?<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>I thought of the following:<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>1-referenced shapefile catalog – like mapserver tileindex shapefiles<o:p></o:p></span></p><p class=MsoListParagraph style='margin-left:40.5pt;text-indent:-18.0pt;mso-list:l0 level1 lfo2'><![if !supportLists]><span lang=EN-US><span style='mso-list:Ignore'>-<span style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]><span lang=EN-US>Qgis does not support this<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>2-vrt file<o:p></o:p></span></p><p class=MsoListParagraph style='margin-left:40.5pt;text-indent:-18.0pt;mso-list:l0 level1 lfo2'><![if !supportLists]><span lang=EN-US><span style='mso-list:Ignore'>-<span style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]><span lang=EN-US>Qgis is too slow when there are many images in the catalog<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>3-referenced catalog in some other format? Sqllite?<o:p></o:p></span></p><p class=MsoListParagraph style='margin-left:40.5pt;text-indent:-18.0pt;mso-list:l0 level1 lfo2'><![if !supportLists]><span lang=EN-US><span style='mso-list:Ignore'>-<span style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]><span lang=EN-US>Couldn’t find an alternative<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>4-just load a directory full of rasters<o:p></o:p></span></p><p class=MsoListParagraph style='margin-left:40.5pt;text-indent:-18.0pt;mso-list:l0 level1 lfo2'><![if !supportLists]><span lang=EN-US><span style='mso-list:Ignore'>-<span style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]><span lang=EN-US>I didn’t even investigate this option since I figure this would be painfully slow every time you would load the directory…<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>One last detail: I’m using ecw images, but I’m betting this is not format related…<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>I appreciate your thoughts and knowledge on this</span><span lang=EN-US style='font-family:Wingdings'>J</span><span lang=EN-US><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>Regards,<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>Duarte<o:p></o:p></span></p></div></body></html>