Bug report #3461

slow image load visualization for tfw with rotation parameters

Added by Luca Lanteri over 9 years ago. Updated over 9 years ago.

Status:Closed
Priority:Low
Assignee:nobody -
Category:Build/Install
Affected QGIS version: Regression?:No
Operating System:All Easy fix?:No
Pull Request or Patch supplied: Resolution:duplicate
Crashes QGIS or corrupts data: Copied to github as #:13521

Description

When I try to load or visualize raster ortophoto (abotu 120 Mb) with rotation parameter in the header file (tfw) qgis is freezing for 40-50 sec. I have to wait the same time for every pan/refresh operation.
If the rotation parameters is set to zero the image is loaded just in few second.
The same raster (with rotation parameters) works fine with others GIS application, as udig for example.
The italian list suggest me to open a ticket.
I can't attach the image due to size limit but I think the problem
is the same with all image

This is the GeoTIFF info:

Driver: GTiff/GeoTIFF
Files: 0021_00211001_rgb.tif
Size is 7680, 13824
Coordinate System is:
PROJCS["WGS 84 / UTM zone 32N",
GEOGCS["WGS 84",
DATUM["WGS_1984",
SPHEROID["WGS 84",6378137,298.257223563,
AUTHORITYEPSG""7030,
AUTHORITYEPSG""6326,
PRIMEMGreenwich,
UNITdegree,
AUTHORITYEPSG""4326,
PROJECTIONTransverse_Mercator,
PARAMETERlatitude_of_origin,
PARAMETERcentral_meridian,
PARAMETERscale_factor,
PARAMETERfalse_easting,
PARAMETERfalse_northing,
UNIT["metre",1,
AUTHORITYEPSG""9001,
AUTHORITYEPSG""32632
GeoTransform =
32339334.7755, 0.249, 0.018
5003594.055500001, 0.018, -0.249
Metadata:
EXIF_BitsPerSample=16 16 16
EXIF_Compression=1
EXIF_PhotometricInterpretation=2
EXIF_Orientation=1
EXIF_SamplesPerPixel=3
EXIF_XResolution=(833.333)
EXIF_YResolution=(833.333)
EXIF_PlanarConfiguration=1
EXIF_ResolutionUnit=3
EXIF_Software=Adobe Photoshop CS2 Windows
EXIF_DateTime=2008:10:16 08:59:35
EXIF_ColorSpace=65535
EXIF_PixelXDimension=7680
EXIF_PixelYDimension=13824
AREA_OR_POINT=Area
Image Structure Metadata:
COMPRESSION=DEFLATE
INTERLEAVE=PIXEL
Corner Coordinates:
Upper Left (32339334.776, 5003594.056) (129d24'8.65"W,Invalid angle)
Lower Left (32339583.608, 5000151.880) ( 78d11'7.42"W,Invalid angle)
Upper Right (32341247.096, 5003732.296) ( 68d14'50.72"W,Invalid angle)
Lower Right (32341495.928, 5000290.120) ( 6d30'39.61"W,Invalid angle)
Center (32340415.352, 5001942.088) (120d44'35.31"E,Invalid angle)
Band 1 Block=256x256 Type=Byte, ColorInterp=Red
Overviews: 3840x6912, 1920x3456, 960x1728, 480x864
Band 2 Block=256x256 Type=Byte, ColorInterp=Green
Overviews: 3840x6912, 1920x3456, 960x1728, 480x864
Band 3 Block=256x256 Type=Byte, ColorInterp=Blue
Overviews: 3840x6912, 1920x3456, 960x1728, 480x864

History

#1 Updated by Paolo Cavallini over 9 years ago

  • Resolution set to duplicate
  • Status changed from Open to Closed

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