Re: [Qgis-user] Tif too slow to show
yes, in the 1st tiff header the GeoTransform = 740551.2494, 0.078, 0.1506 189669.7013, 0.1506, -0.078 it means GeoTransform = if you transform the N-S oriented image in a NS oriented image I think the image will be magically displayed faster. Of course, adding tiled and overview with gdal should improve the performance. I think the problem isn't in the GDAL drivers because I try to open the same "slow" image with others OS GIS and the it's is displayed well. 2011/4/29 Patrice Vetsel > Is it because the original is not Nort-South oriented and must be rotated > by QGis ? > > > Le 29/04/11 14:08, Patrice Vetsel a écrit : > > Hi, >> >> with an original raster (tif+tfw), from french cadastre, when I open it >> under qgis, it's unusable because QGis is horribly slow. >> with the same raster, but after using georef extension (tif+aux.xml), QGis >> is responsive >> >> here I put gdalinfo of the original (slow) and referenced : >> >> What's the problem with the first ? I would prefer to not have to manually >> georeference all my original rasters ;) >> >> In the same time, what's the most efficient raster type to use with QGis ? >> >> Regards >> >> >> Patrice Vetsel >> >> SLOW : >> MacBook-Pro-de-Patrice-Vetsel:~ Patrice$ >> /Library/Frameworks/GDAL.framework/Programs/gdalinfo >> ~/Desktop/3004221146000AB01021.tif >> Driver: GTiff/GeoTIFF >> Files: /Users/Patrice/Desktop/3004221146000AB01021.tif >>/Users/Patrice/Desktop/3004221146000AB01021.tfw >> Size is 12329, 8760 >> Coordinate System is `' >> GeoTransform = >> 740551.2494, 0.078, 0.1506 >> 189669.7013, 0.1506, -0.078 >> Metadata: >> TIFFTAG_ARTIST=JBG-PYV-APIC >> TIFFTAG_XRESOLUTION=300 >> TIFFTAG_YRESOLUTION=300 >> TIFFTAG_RESOLUTIONUNIT=2 (pixels/inch) >> Image Structure Metadata: >> COMPRESSION=CCITTFAX4 >> INTERLEAVE=BAND >> MINISWHITE=YES >> Corner Coordinates: >> Upper Left ( 740551.249, 189669.701) >> Lower Left ( 741870.505, 188986.421) >> Upper Right ( 741512.911, 191526.449) >> Lower Right ( 742832.167, 190843.169) >> Center ( 741691.708, 190256.435) >> Band 1 Block=12329x1 Type=Byte, ColorInterp=Palette >> Image Structure Metadata: >> NBITS=1 >> Color Table (RGB with 2 entries) >> 0: 255,255,255,255 >> 1: 0,0,0,255 >> >> >> OK : >> MacBook-Pro-de-Patrice-Vetsel:~ Patrice$ >> /Library/Frameworks/GDAL.framework/Programs/gdalinfo >> ~/Desktop/testgeo/AB_georef.tif >> Driver: GTiff/GeoTIFF >> Files: /Users/Patrice/Desktop/testgeo/AB_georef.tif >>/Users/Patrice/Desktop/testgeo/AB_georef.tif.aux.xml >> Size is 13446, 14968 >> Coordinate System is `' >> Origin = (740550.783870017039590,191526.220101331215119) >> Pixel Size = (0.169699598291267,-0.169699598291267) >> Image Structure Metadata: >> INTERLEAVE=BAND >> Corner Coordinates: >> Upper Left ( 740550.784, 191526.220) >> Lower Left ( 740550.784, 188986.157) >> Upper Right ( 742832.565, 191526.220) >> Lower Right ( 742832.565, 188986.157) >> Center ( 741691.674, 190256.188) >> Band 1 Block=13446x1 Type=Byte, ColorInterp=Palette >> Color Table (RGB with 256 entries) >> 0: 255,255,255,255 >> 1: 0,0,0,255 >> 2: 0,0,0,255 >> 3: 0,0,0,255 >> 4: 0,0,0,255 >> 5: 0,0,0,255 >> 6: 0,0,0,255 >> 7: 0,0,0,255 >> 8: 0,0,0,255 >> 9: 0,0,0,255 >>10: 0,0,0,255 >>11: 0,0,0,255 >>12: 0,0,0,255 >>13: 0,0,0,255 >>14: 0,0,0,255 >>15: 0,0,0,255 >>16: 0,0,0,255 >>17: 0,0,0,255 >>18: 0,0,0,255 >>19: 0,0,0,255 >>20: 0,0,0,255 >>21: 0,0,0,255 >>22: 0,0,0,255 >>23: 0,0,0,255 >>24: 0,0,0,255 >>25: 0,0,0,255 >>26: 0,0,0,255 >>27: 0,0,0,255 >>28: 0,0,0,255 >>29: 0,0,0,255 >>30: 0,0,0,255 >>31: 0,0,0,255 >>32: 0,0,0,255 >>33: 0,0,0,255 >>34: 0,0,0,255 >>35: 0,0,0,255 >>36: 0,0,0,255 >>37: 0,0,0,255 >>38: 0,0,0,255 >>39: 0,0,0,255 >>40: 0,0,0,255 >>41: 0,0,0,255 >>42: 0,0,0,255 >>43: 0,0,0,255 >>44: 0,0,0,255 >>45: 0,0,0,255 >>46: 0,0,0,255 >>47: 0,0,0,255 >>48: 0,0,0,255 >>49: 0,0,0,255 >>50: 0,0,0,255 >>51: 0,0,0,255 >>52: 0,0,0,255 >>53: 0,0,0,255 >>54: 0,0,0,255 >>55: 0,0,0,255 >>56: 0,0,0,255 >>57: 0,0,0,255 >>58: 0,0,0,255 >>59: 0,0,0,255 >>60: 0,0,0,255 >>61: 0,0,0,255 >>62: 0,0,0,255 >>63: 0,0,0,255 >>64: 0,0,0,255 >>65: 0,0,0,255 >>66: 0,0,0,255 >>67: 0,0,0,255 >>68: 0,0,0,255 >>69: 0,0,0,255 >>70: 0,0,0,255 >>71: 0,0,0,255 >>72: 0,0,0,255 >>73: 0,0,0,255 >>74: 0,0,0,255 >>75: 0,0,0,255 >>76: 0,0,0,255 >>77: 0,0,0,255 >>78: 0,0,0,255 >>79: 0,0,0,255 >>80: 0,0,0,255 >>81: 0,0,0,255 >>82: 0,0,0,255 >>83: 0,0,0,255 >>84: 0,0,0,255 >>85: 0,0,0,255 >>86: 0,0,0,255 >>87: 0,0,0,255 >>88: 0,0,0,255 >>89: 0,0,0,255 >>90: 0,0,0,255 >>91: 0,0,0,255 >>92:
Re: [Qgis-user] Tif too slow to show
Is it because the original is not Nort-South oriented and must be rotated by QGis ? Le 29/04/11 14:08, Patrice Vetsel a écrit : Hi, with an original raster (tif+tfw), from french cadastre, when I open it under qgis, it's unusable because QGis is horribly slow. with the same raster, but after using georef extension (tif+aux.xml), QGis is responsive here I put gdalinfo of the original (slow) and referenced : What's the problem with the first ? I would prefer to not have to manually georeference all my original rasters ;) In the same time, what's the most efficient raster type to use with QGis ? Regards Patrice Vetsel SLOW : MacBook-Pro-de-Patrice-Vetsel:~ Patrice$ /Library/Frameworks/GDAL.framework/Programs/gdalinfo ~/Desktop/3004221146000AB01021.tif Driver: GTiff/GeoTIFF Files: /Users/Patrice/Desktop/3004221146000AB01021.tif /Users/Patrice/Desktop/3004221146000AB01021.tfw Size is 12329, 8760 Coordinate System is `' GeoTransform = 740551.2494, 0.078, 0.1506 189669.7013, 0.1506, -0.078 Metadata: TIFFTAG_ARTIST=JBG-PYV-APIC TIFFTAG_XRESOLUTION=300 TIFFTAG_YRESOLUTION=300 TIFFTAG_RESOLUTIONUNIT=2 (pixels/inch) Image Structure Metadata: COMPRESSION=CCITTFAX4 INTERLEAVE=BAND MINISWHITE=YES Corner Coordinates: Upper Left ( 740551.249, 189669.701) Lower Left ( 741870.505, 188986.421) Upper Right ( 741512.911, 191526.449) Lower Right ( 742832.167, 190843.169) Center ( 741691.708, 190256.435) Band 1 Block=12329x1 Type=Byte, ColorInterp=Palette Image Structure Metadata: NBITS=1 Color Table (RGB with 2 entries) 0: 255,255,255,255 1: 0,0,0,255 OK : MacBook-Pro-de-Patrice-Vetsel:~ Patrice$ /Library/Frameworks/GDAL.framework/Programs/gdalinfo ~/Desktop/testgeo/AB_georef.tif Driver: GTiff/GeoTIFF Files: /Users/Patrice/Desktop/testgeo/AB_georef.tif /Users/Patrice/Desktop/testgeo/AB_georef.tif.aux.xml Size is 13446, 14968 Coordinate System is `' Origin = (740550.783870017039590,191526.220101331215119) Pixel Size = (0.169699598291267,-0.169699598291267) Image Structure Metadata: INTERLEAVE=BAND Corner Coordinates: Upper Left ( 740550.784, 191526.220) Lower Left ( 740550.784, 188986.157) Upper Right ( 742832.565, 191526.220) Lower Right ( 742832.565, 188986.157) Center ( 741691.674, 190256.188) Band 1 Block=13446x1 Type=Byte, ColorInterp=Palette Color Table (RGB with 256 entries) 0: 255,255,255,255 1: 0,0,0,255 2: 0,0,0,255 3: 0,0,0,255 4: 0,0,0,255 5: 0,0,0,255 6: 0,0,0,255 7: 0,0,0,255 8: 0,0,0,255 9: 0,0,0,255 10: 0,0,0,255 11: 0,0,0,255 12: 0,0,0,255 13: 0,0,0,255 14: 0,0,0,255 15: 0,0,0,255 16: 0,0,0,255 17: 0,0,0,255 18: 0,0,0,255 19: 0,0,0,255 20: 0,0,0,255 21: 0,0,0,255 22: 0,0,0,255 23: 0,0,0,255 24: 0,0,0,255 25: 0,0,0,255 26: 0,0,0,255 27: 0,0,0,255 28: 0,0,0,255 29: 0,0,0,255 30: 0,0,0,255 31: 0,0,0,255 32: 0,0,0,255 33: 0,0,0,255 34: 0,0,0,255 35: 0,0,0,255 36: 0,0,0,255 37: 0,0,0,255 38: 0,0,0,255 39: 0,0,0,255 40: 0,0,0,255 41: 0,0,0,255 42: 0,0,0,255 43: 0,0,0,255 44: 0,0,0,255 45: 0,0,0,255 46: 0,0,0,255 47: 0,0,0,255 48: 0,0,0,255 49: 0,0,0,255 50: 0,0,0,255 51: 0,0,0,255 52: 0,0,0,255 53: 0,0,0,255 54: 0,0,0,255 55: 0,0,0,255 56: 0,0,0,255 57: 0,0,0,255 58: 0,0,0,255 59: 0,0,0,255 60: 0,0,0,255 61: 0,0,0,255 62: 0,0,0,255 63: 0,0,0,255 64: 0,0,0,255 65: 0,0,0,255 66: 0,0,0,255 67: 0,0,0,255 68: 0,0,0,255 69: 0,0,0,255 70: 0,0,0,255 71: 0,0,0,255 72: 0,0,0,255 73: 0,0,0,255 74: 0,0,0,255 75: 0,0,0,255 76: 0,0,0,255 77: 0,0,0,255 78: 0,0,0,255 79: 0,0,0,255 80: 0,0,0,255 81: 0,0,0,255 82: 0,0,0,255 83: 0,0,0,255 84: 0,0,0,255 85: 0,0,0,255 86: 0,0,0,255 87: 0,0,0,255 88: 0,0,0,255 89: 0,0,0,255 90: 0,0,0,255 91: 0,0,0,255 92: 0,0,0,255 93: 0,0,0,255 94: 0,0,0,255 95: 0,0,0,255 96: 0,0,0,255 97: 0,0,0,255 98: 0,0,0,255 99: 0,0,0,255 100: 0,0,0,255 101: 0,0,0,255 102: 0,0,0,255 103: 0,0,0,255 104: 0,0,0,255 105: 0,0,0,255 106: 0,0,0,255 107: 0,0,0,255 108: 0,0,0,255 109: 0,0,0,255 110: 0,0,0,255 111: 0,0,0,255 112: 0,0,0,255 113: 0,0,0,255 114: 0,0,0,255 115: 0,0,0,255 116: 0,0,0,255 117: 0,0,0,255 118: 0,0,0,255 119: 0,0,0,255 120: 0,0,0,255 121: 0,0,0,255 122: 0,0,0,255 123: 0,0,0,255 124: 0,0,0,255 125: 0,0,0,255 126: 0,0,0,255 127: 0,0,0,255 128: 0,0,0,255 129: 0,0,0,255 130: 0,0,0,255 131: 0,0,0,255 132: 0,0,0,255 133: 0,0,0,255 134: 0,0,0,255 135: 0,0,0,255 136: 0,0,0,255 137: 0,0,0,255 138: 0,0,0,255 139: 0,0,0,255 140: 0,0,0,255 141: 0,0,0,255
Re: [Qgis-user] Tif too slow to show
I've had the same problem with my ortophoto. I'm not really sure but I think the problem is due to the rotation parameter that is not managed at the best by QGIS. Some months ago I've tried to oped a ticket ( https://trac.osgeo.org/qgis/ticket/3460). 2011/4/29 Kris Nackaerts > I see now that your files are CCITTFAX4 compressed. > > I had similar B&W rasters, topographic maps from Belgium, same compression. > > I uncompressed all, should boost performance. Plus, I added plenty > overviews. > > Kris > > > Original-Nachricht > > Datum: Fri, 29 Apr 2011 14:40:29 +0200 > > Von: Patrice Vetsel > > An: Kris Nackaerts > > Betreff: Re: [Qgis-user] Tif too slow to show > > > I'v done a > > gdaladdo -r average 3004221146000AB01021.tif 2 4 8 16 > > > > but QGis is always too slow. > > > > Thanks > > > > > > Le 29 avr. 2011 à 14:21, Kris Nackaerts a écrit : > > > > > Dear, > > > > > > I would start trying gdaladdo to create overviews. Does wonders for > > speed. > > > > > > I'm working right now with a global Landsat dataset, vrt, +4000 tiles, > > roughly 700k by 300k pixels in total, and even this can be handled > > efficiently once you've overviews. > > > > > > I mainly use uncompressed geotiffs. > > > > > > Kris > > > > > > > > > Original-Nachricht > > >> Datum: Fri, 29 Apr 2011 14:08:00 +0200 > > >> Von: Patrice Vetsel > > >> An: qgis-user@lists.osgeo.org > > >> Betreff: [Qgis-user] Tif too slow to show > > > > > >> Hi, > > >> > > >> with an original raster (tif+tfw), from french cadastre, when I open > it > > >> under qgis, it's unusable because QGis is horribly slow. > > >> with the same raster, but after using georef extension (tif+aux.xml), > > QGis > > >> is responsive > > >> > > >> here I put gdalinfo of the original (slow) and referenced : > > >> > > >> What's the problem with the first ? I would prefer to not have to > > manually > > >> georeference all my original rasters ;) > > >> > > >> In the same time, what's the most efficient raster type to use with > > QGis ? > > >> > > >> Regards > > >> > > >> > > >> Patrice Vetsel > > >> > > >> SLOW : > > >> MacBook-Pro-de-Patrice-Vetsel:~ Patrice$ > > >> /Library/Frameworks/GDAL.framework/Programs/gdalinfo > > ~/Desktop/3004221146000AB01021.tif > > >> Driver: GTiff/GeoTIFF > > >> Files: /Users/Patrice/Desktop/3004221146000AB01021.tif > > >> /Users/Patrice/Desktop/3004221146000AB01021.tfw > > >> Size is 12329, 8760 > > >> Coordinate System is `' > > >> GeoTransform = > > >> 740551.2494, 0.078, 0.1506 > > >> 189669.7013, 0.1506, -0.078 > > >> Metadata: > > >> TIFFTAG_ARTIST=JBG-PYV-APIC > > >> TIFFTAG_XRESOLUTION=300 > > >> TIFFTAG_YRESOLUTION=300 > > >> TIFFTAG_RESOLUTIONUNIT=2 (pixels/inch) > > >> Image Structure Metadata: > > >> COMPRESSION=CCITTFAX4 > > >> INTERLEAVE=BAND > > >> MINISWHITE=YES > > >> Corner Coordinates: > > >> Upper Left ( 740551.249, 189669.701) > > >> Lower Left ( 741870.505, 188986.421) > > >> Upper Right ( 741512.911, 191526.449) > > >> Lower Right ( 742832.167, 190843.169) > > >> Center ( 741691.708, 190256.435) > > >> Band 1 Block=12329x1 Type=Byte, ColorInterp=Palette > > >> Image Structure Metadata: > > >>NBITS=1 > > >> Color Table (RGB with 2 entries) > > >>0: 255,255,255,255 > > >>1: 0,0,0,255 > > >> > > >> > > >> OK : > > >> MacBook-Pro-de-Patrice-Vetsel:~ Patrice$ > > >> /Library/Frameworks/GDAL.framework/Programs/gdalinfo > > ~/Desktop/testgeo/AB_georef.tif > > >> Driver: GTiff/GeoTIFF > > >> Files: /Users/Patrice/Desktop/testgeo/AB_georef.tif > > >> /Users/Patrice/Desktop/testgeo/AB_georef.tif.aux.xml > > >> Size is 13446, 14968 > > >> Coordinate System is `' > > >> Origin = (740550.783870017039590,191526.220101331215119) > > >> Pixel Size = (0.169699598291267,-0.169699598291267) > > &
Re: [Qgis-user] Tif too slow to show
I see now that your files are CCITTFAX4 compressed. I had similar B&W rasters, topographic maps from Belgium, same compression. I uncompressed all, should boost performance. Plus, I added plenty overviews. Kris Original-Nachricht > Datum: Fri, 29 Apr 2011 14:40:29 +0200 > Von: Patrice Vetsel > An: Kris Nackaerts > Betreff: Re: [Qgis-user] Tif too slow to show > I'v done a > gdaladdo -r average 3004221146000AB01021.tif 2 4 8 16 > > but QGis is always too slow. > > Thanks > > > Le 29 avr. 2011 à 14:21, Kris Nackaerts a écrit : > > > Dear, > > > > I would start trying gdaladdo to create overviews. Does wonders for > speed. > > > > I'm working right now with a global Landsat dataset, vrt, +4000 tiles, > roughly 700k by 300k pixels in total, and even this can be handled > efficiently once you've overviews. > > > > I mainly use uncompressed geotiffs. > > > > Kris > > > > > > Original-Nachricht -------- > >> Datum: Fri, 29 Apr 2011 14:08:00 +0200 > >> Von: Patrice Vetsel > >> An: qgis-user@lists.osgeo.org > >> Betreff: [Qgis-user] Tif too slow to show > > > >> Hi, > >> > >> with an original raster (tif+tfw), from french cadastre, when I open it > >> under qgis, it's unusable because QGis is horribly slow. > >> with the same raster, but after using georef extension (tif+aux.xml), > QGis > >> is responsive > >> > >> here I put gdalinfo of the original (slow) and referenced : > >> > >> What's the problem with the first ? I would prefer to not have to > manually > >> georeference all my original rasters ;) > >> > >> In the same time, what's the most efficient raster type to use with > QGis ? > >> > >> Regards > >> > >> > >> Patrice Vetsel > >> > >> SLOW : > >> MacBook-Pro-de-Patrice-Vetsel:~ Patrice$ > >> /Library/Frameworks/GDAL.framework/Programs/gdalinfo > ~/Desktop/3004221146000AB01021.tif > >> Driver: GTiff/GeoTIFF > >> Files: /Users/Patrice/Desktop/3004221146000AB01021.tif > >> /Users/Patrice/Desktop/3004221146000AB01021.tfw > >> Size is 12329, 8760 > >> Coordinate System is `' > >> GeoTransform = > >> 740551.2494, 0.078, 0.1506 > >> 189669.7013, 0.1506, -0.078 > >> Metadata: > >> TIFFTAG_ARTIST=JBG-PYV-APIC > >> TIFFTAG_XRESOLUTION=300 > >> TIFFTAG_YRESOLUTION=300 > >> TIFFTAG_RESOLUTIONUNIT=2 (pixels/inch) > >> Image Structure Metadata: > >> COMPRESSION=CCITTFAX4 > >> INTERLEAVE=BAND > >> MINISWHITE=YES > >> Corner Coordinates: > >> Upper Left ( 740551.249, 189669.701) > >> Lower Left ( 741870.505, 188986.421) > >> Upper Right ( 741512.911, 191526.449) > >> Lower Right ( 742832.167, 190843.169) > >> Center ( 741691.708, 190256.435) > >> Band 1 Block=12329x1 Type=Byte, ColorInterp=Palette > >> Image Structure Metadata: > >>NBITS=1 > >> Color Table (RGB with 2 entries) > >>0: 255,255,255,255 > >>1: 0,0,0,255 > >> > >> > >> OK : > >> MacBook-Pro-de-Patrice-Vetsel:~ Patrice$ > >> /Library/Frameworks/GDAL.framework/Programs/gdalinfo > ~/Desktop/testgeo/AB_georef.tif > >> Driver: GTiff/GeoTIFF > >> Files: /Users/Patrice/Desktop/testgeo/AB_georef.tif > >> /Users/Patrice/Desktop/testgeo/AB_georef.tif.aux.xml > >> Size is 13446, 14968 > >> Coordinate System is `' > >> Origin = (740550.783870017039590,191526.220101331215119) > >> Pixel Size = (0.169699598291267,-0.169699598291267) > >> Image Structure Metadata: > >> INTERLEAVE=BAND > >> Corner Coordinates: > >> Upper Left ( 740550.784, 191526.220) > >> Lower Left ( 740550.784, 188986.157) > >> Upper Right ( 742832.565, 191526.220) > >> Lower Right ( 742832.565, 188986.157) > >> Center ( 741691.674, 190256.188) > >> Band 1 Block=13446x1 Type=Byte, ColorInterp=Palette > >> Color Table (RGB with 256 entries) > >>0: 255,255,255,255 > >>1: 0,0,0,255 > >>2: 0,0,0,255 > >>3: 0,0,0,255 > >>4: 0,0,0,255 > >>5: 0,0,0,255 > >>6: 0,0,0,255 > >>7: 0,0,0,255 > >>8: 0,0,0,255 > >>9: 0,0,0,255 > >> 10: 0,0,0,255 > &
Re: [Qgis-user] Tif too slow to show
Dear, I would start trying gdaladdo to create overviews. Does wonders for speed. I'm working right now with a global Landsat dataset, vrt, +4000 tiles, roughly 700k by 300k pixels in total, and even this can be handled efficiently once you've overviews. I mainly use uncompressed geotiffs. Kris Original-Nachricht > Datum: Fri, 29 Apr 2011 14:08:00 +0200 > Von: Patrice Vetsel > An: qgis-user@lists.osgeo.org > Betreff: [Qgis-user] Tif too slow to show > Hi, > > with an original raster (tif+tfw), from french cadastre, when I open it > under qgis, it's unusable because QGis is horribly slow. > with the same raster, but after using georef extension (tif+aux.xml), QGis > is responsive > > here I put gdalinfo of the original (slow) and referenced : > > What's the problem with the first ? I would prefer to not have to manually > georeference all my original rasters ;) > > In the same time, what's the most efficient raster type to use with QGis ? > > Regards > > > Patrice Vetsel > > SLOW : > MacBook-Pro-de-Patrice-Vetsel:~ Patrice$ > /Library/Frameworks/GDAL.framework/Programs/gdalinfo > ~/Desktop/3004221146000AB01021.tif > Driver: GTiff/GeoTIFF > Files: /Users/Patrice/Desktop/3004221146000AB01021.tif >/Users/Patrice/Desktop/3004221146000AB01021.tfw > Size is 12329, 8760 > Coordinate System is `' > GeoTransform = > 740551.2494, 0.078, 0.1506 > 189669.7013, 0.1506, -0.078 > Metadata: > TIFFTAG_ARTIST=JBG-PYV-APIC > TIFFTAG_XRESOLUTION=300 > TIFFTAG_YRESOLUTION=300 > TIFFTAG_RESOLUTIONUNIT=2 (pixels/inch) > Image Structure Metadata: > COMPRESSION=CCITTFAX4 > INTERLEAVE=BAND > MINISWHITE=YES > Corner Coordinates: > Upper Left ( 740551.249, 189669.701) > Lower Left ( 741870.505, 188986.421) > Upper Right ( 741512.911, 191526.449) > Lower Right ( 742832.167, 190843.169) > Center ( 741691.708, 190256.435) > Band 1 Block=12329x1 Type=Byte, ColorInterp=Palette > Image Structure Metadata: > NBITS=1 > Color Table (RGB with 2 entries) > 0: 255,255,255,255 > 1: 0,0,0,255 > > > OK : > MacBook-Pro-de-Patrice-Vetsel:~ Patrice$ > /Library/Frameworks/GDAL.framework/Programs/gdalinfo > ~/Desktop/testgeo/AB_georef.tif > Driver: GTiff/GeoTIFF > Files: /Users/Patrice/Desktop/testgeo/AB_georef.tif >/Users/Patrice/Desktop/testgeo/AB_georef.tif.aux.xml > Size is 13446, 14968 > Coordinate System is `' > Origin = (740550.783870017039590,191526.220101331215119) > Pixel Size = (0.169699598291267,-0.169699598291267) > Image Structure Metadata: > INTERLEAVE=BAND > Corner Coordinates: > Upper Left ( 740550.784, 191526.220) > Lower Left ( 740550.784, 188986.157) > Upper Right ( 742832.565, 191526.220) > Lower Right ( 742832.565, 188986.157) > Center ( 741691.674, 190256.188) > Band 1 Block=13446x1 Type=Byte, ColorInterp=Palette > Color Table (RGB with 256 entries) > 0: 255,255,255,255 > 1: 0,0,0,255 > 2: 0,0,0,255 > 3: 0,0,0,255 > 4: 0,0,0,255 > 5: 0,0,0,255 > 6: 0,0,0,255 > 7: 0,0,0,255 > 8: 0,0,0,255 > 9: 0,0,0,255 >10: 0,0,0,255 >11: 0,0,0,255 >12: 0,0,0,255 >13: 0,0,0,255 >14: 0,0,0,255 >15: 0,0,0,255 >16: 0,0,0,255 >17: 0,0,0,255 >18: 0,0,0,255 >19: 0,0,0,255 >20: 0,0,0,255 >21: 0,0,0,255 >22: 0,0,0,255 >23: 0,0,0,255 >24: 0,0,0,255 >25: 0,0,0,255 >26: 0,0,0,255 >27: 0,0,0,255 >28: 0,0,0,255 >29: 0,0,0,255 >30: 0,0,0,255 >31: 0,0,0,255 >32: 0,0,0,255 >33: 0,0,0,255 >34: 0,0,0,255 >35: 0,0,0,255 >36: 0,0,0,255 >37: 0,0,0,255 >38: 0,0,0,255 >39: 0,0,0,255 >40: 0,0,0,255 >41: 0,0,0,255 >42: 0,0,0,255 >43: 0,0,0,255 >44: 0,0,0,255 >45: 0,0,0,255 >46: 0,0,0,255 >47: 0,0,0,255 >48: 0,0,0,255 >49: 0,0,0,255 >50: 0,0,0,255 >51: 0,0,0,255 >52: 0,0,0,255 >53: 0,0,0,255 >54: 0,0,0,255 >55: 0,0,0,255 >56: 0,0,0,255 >57: 0,0,0,255 >58: 0,0,0,255 >59: 0,0,0,255 >60: 0,0,0,255 >61: 0,0,0,255 >62: 0,0,0,255 >63: 0,0,0,255 >64: 0,0,0,255 >65: 0,0,0,255 >66: 0,0,0,255 >67: 0,0,0,255 >68: 0,0,0,255 >69: 0,0,0,255 >70: 0,0,0,255 >71: 0,0,0,255 >72: 0,0,0,255 >73: 0,0,0,255 >74: 0,0,0,255 >75: 0,0,0,255 >76: 0,0,0,255 >77: 0,0,0,255 >78: 0,0,0,255 >79: 0,0,0,255 >80: 0,0,0,255 >
[Qgis-user] Tif too slow to show
Hi, with an original raster (tif+tfw), from french cadastre, when I open it under qgis, it's unusable because QGis is horribly slow. with the same raster, but after using georef extension (tif+aux.xml), QGis is responsive here I put gdalinfo of the original (slow) and referenced : What's the problem with the first ? I would prefer to not have to manually georeference all my original rasters ;) In the same time, what's the most efficient raster type to use with QGis ? Regards Patrice Vetsel SLOW : MacBook-Pro-de-Patrice-Vetsel:~ Patrice$ /Library/Frameworks/GDAL.framework/Programs/gdalinfo ~/Desktop/3004221146000AB01021.tif Driver: GTiff/GeoTIFF Files: /Users/Patrice/Desktop/3004221146000AB01021.tif /Users/Patrice/Desktop/3004221146000AB01021.tfw Size is 12329, 8760 Coordinate System is `' GeoTransform = 740551.2494, 0.078, 0.1506 189669.7013, 0.1506, -0.078 Metadata: TIFFTAG_ARTIST=JBG-PYV-APIC TIFFTAG_XRESOLUTION=300 TIFFTAG_YRESOLUTION=300 TIFFTAG_RESOLUTIONUNIT=2 (pixels/inch) Image Structure Metadata: COMPRESSION=CCITTFAX4 INTERLEAVE=BAND MINISWHITE=YES Corner Coordinates: Upper Left ( 740551.249, 189669.701) Lower Left ( 741870.505, 188986.421) Upper Right ( 741512.911, 191526.449) Lower Right ( 742832.167, 190843.169) Center ( 741691.708, 190256.435) Band 1 Block=12329x1 Type=Byte, ColorInterp=Palette Image Structure Metadata: NBITS=1 Color Table (RGB with 2 entries) 0: 255,255,255,255 1: 0,0,0,255 OK : MacBook-Pro-de-Patrice-Vetsel:~ Patrice$ /Library/Frameworks/GDAL.framework/Programs/gdalinfo ~/Desktop/testgeo/AB_georef.tif Driver: GTiff/GeoTIFF Files: /Users/Patrice/Desktop/testgeo/AB_georef.tif /Users/Patrice/Desktop/testgeo/AB_georef.tif.aux.xml Size is 13446, 14968 Coordinate System is `' Origin = (740550.783870017039590,191526.220101331215119) Pixel Size = (0.169699598291267,-0.169699598291267) Image Structure Metadata: INTERLEAVE=BAND Corner Coordinates: Upper Left ( 740550.784, 191526.220) Lower Left ( 740550.784, 188986.157) Upper Right ( 742832.565, 191526.220) Lower Right ( 742832.565, 188986.157) Center ( 741691.674, 190256.188) Band 1 Block=13446x1 Type=Byte, ColorInterp=Palette Color Table (RGB with 256 entries) 0: 255,255,255,255 1: 0,0,0,255 2: 0,0,0,255 3: 0,0,0,255 4: 0,0,0,255 5: 0,0,0,255 6: 0,0,0,255 7: 0,0,0,255 8: 0,0,0,255 9: 0,0,0,255 10: 0,0,0,255 11: 0,0,0,255 12: 0,0,0,255 13: 0,0,0,255 14: 0,0,0,255 15: 0,0,0,255 16: 0,0,0,255 17: 0,0,0,255 18: 0,0,0,255 19: 0,0,0,255 20: 0,0,0,255 21: 0,0,0,255 22: 0,0,0,255 23: 0,0,0,255 24: 0,0,0,255 25: 0,0,0,255 26: 0,0,0,255 27: 0,0,0,255 28: 0,0,0,255 29: 0,0,0,255 30: 0,0,0,255 31: 0,0,0,255 32: 0,0,0,255 33: 0,0,0,255 34: 0,0,0,255 35: 0,0,0,255 36: 0,0,0,255 37: 0,0,0,255 38: 0,0,0,255 39: 0,0,0,255 40: 0,0,0,255 41: 0,0,0,255 42: 0,0,0,255 43: 0,0,0,255 44: 0,0,0,255 45: 0,0,0,255 46: 0,0,0,255 47: 0,0,0,255 48: 0,0,0,255 49: 0,0,0,255 50: 0,0,0,255 51: 0,0,0,255 52: 0,0,0,255 53: 0,0,0,255 54: 0,0,0,255 55: 0,0,0,255 56: 0,0,0,255 57: 0,0,0,255 58: 0,0,0,255 59: 0,0,0,255 60: 0,0,0,255 61: 0,0,0,255 62: 0,0,0,255 63: 0,0,0,255 64: 0,0,0,255 65: 0,0,0,255 66: 0,0,0,255 67: 0,0,0,255 68: 0,0,0,255 69: 0,0,0,255 70: 0,0,0,255 71: 0,0,0,255 72: 0,0,0,255 73: 0,0,0,255 74: 0,0,0,255 75: 0,0,0,255 76: 0,0,0,255 77: 0,0,0,255 78: 0,0,0,255 79: 0,0,0,255 80: 0,0,0,255 81: 0,0,0,255 82: 0,0,0,255 83: 0,0,0,255 84: 0,0,0,255 85: 0,0,0,255 86: 0,0,0,255 87: 0,0,0,255 88: 0,0,0,255 89: 0,0,0,255 90: 0,0,0,255 91: 0,0,0,255 92: 0,0,0,255 93: 0,0,0,255 94: 0,0,0,255 95: 0,0,0,255 96: 0,0,0,255 97: 0,0,0,255 98: 0,0,0,255 99: 0,0,0,255 100: 0,0,0,255 101: 0,0,0,255 102: 0,0,0,255 103: 0,0,0,255 104: 0,0,0,255 105: 0,0,0,255 106: 0,0,0,255 107: 0,0,0,255 108: 0,0,0,255 109: 0,0,0,255 110: 0,0,0,255 111: 0,0,0,255 112: 0,0,0,255 113: 0,0,0,255 114: 0,0,0,255 115: 0,0,0,255 116: 0,0,0,255 117: 0,0,0,255 118: 0,0,0,255 119: 0,0,0,255 120: 0,0,0,255 121: 0,0,0,255 122: 0,0,0,255 123: 0,0,0,255 124: 0,0,0,255 125: 0,0,0,255 126: 0,0,0,255 127: 0,0,0,255 128: 0,0,0,255 129: 0,0,0,255 130: 0,0,0,255 131: 0,0,0,255 132: 0,0,0,255 133: 0,0,0,255 134: 0,0,0,255 135: 0,0,0,255 136: 0,0,0,255 137: 0,0,0,255 138: 0,0,0,255 139: 0,0,0,255 140: 0,0,0,255 141: 0,0,0,255 142: 0,0,0,255 143: 0,0,0,255 144: 0,0,0,255 145: 0,0,0,255 146: 0,0,0,255 147: 0,0,0,255 148: 0,0,0,255 149: 0,0,0,255 150: 0,0,0,255 151: 0,0,0,255 152: 0,0,0,255 153: 0,0,0,255 154: 0,0,0,255 155: 0,0,0,255 156: 0,0,0,255 157: 0,0,0,255 158: 0,
