Opened 13 years ago
Last modified 13 years ago
#3460 new bug
slow image load visualization for tfw with rotation parameters
| Reported by: | mescal72 | Owned by: | nobody |
|---|---|---|---|
| Priority: | minor: annoyance | Milestone: | Version 1.7.0 |
| Component: | Projection Support | Version: | Trunk |
| Keywords: | Cc: | ||
| Must Fix for Release: | No | Platform: | All |
| Platform Version: | Awaiting user input: | no |
Description
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:
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",0], UNIT["degree",0.0174532925199433], AUTHORITY["EPSG","4326"]],
PROJECTIONTransverse_Mercator, PARAMETER["latitude_of_origin",0], PARAMETER["central_meridian",9], PARAMETER["scale_factor",0.9996], PARAMETER["false_easting",500000], PARAMETER["false_northing",0], UNIT["metre",1,
AUTHORITY["EPSG","9001"]],
AUTHORITY["EPSG","32632"]]
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
