Bug report #3460

Updated by Giovanni Manghi over 2 years ago

When I try to load or visualize raster ortophoto 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 attach a jpg version of the image to limit the size



This is the [[GeoTIFF]] info:



<pre>

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,

AUTHORITY[[EPSG""7030]],

AUTHORITY[[EPSG""6326]],

PRIMEM[[Greenwich]],

UNIT[[degree]],

AUTHORITY[[EPSG""4326]],

PROJECTION[[Transverse_Mercator]],

PARAMETER[[latitude_of_origin]],

PARAMETER[[central_meridian]],

PARAMETER[[scale_factor]],

PARAMETER[[false_easting]],

PARAMETER[[false_northing]],

UNIT["metre",1,

AUTHORITY[[EPSG""9001]],

AUTHORITY[[EPSG""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

</pre>

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