Opened 20 years ago
Closed 14 years ago
#541 closed defect (fixed)
GDAL/OGDI driver does not read ADRG images correctly
Reported by: | Owned by: | warmerdam | |
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Priority: | lowest | Milestone: | |
Component: | GDAL_Raster | Version: | unspecified |
Severity: | normal | Keywords: | |
Cc: |
Description (last modified by )
I am attempting to use gdal_translateto translate between ADRG format and GeoTiff format. A typical command line that I am using looks like this: gdal_translate -of GTiff gltp:/adrg/C:/Kevin/NH1206/TLUS0101:"TLUS0101.IMG":Image out.tif The output of this command is: Input file size is 15616, 11136 0...10...20...30...40...50...60...70...80...90...100 - done. Note that the size that it reports for the input file (15616x11136) is, in fact, correct. That is the size that I want the output file to be (since that is the size that the input file is). This command does generate a (679 Megabyte) 'out.tif' file, which is indeed the correct 15616 x 11136 pixels in size. Unfortunately, there is only 1000 x 1000 pixels worth of data in that file. In other words, the output file looks like a 1000 x 1000 pixel image that was expanded / zoomed to 15616 x 11136 pixels - it's very, very blocky. Note that if I use gdal_merge.py (instead of gdal_translate) to translate the ADRG image to GeoTiff, I get the same behavior. I am guessing that the ADRG reader is reading in the 15616 x 11136 pixel source image and then squishing it down to 1000 x 1000 pixels so that it will fit through the OGDI bridge / OGDI gateway. After the (squished) image passes through the bridge/gateway, the GeoTiff writer then expands the image back to its full 15616 x 11136 pixel resolution before it writes it to the output file. Unfortunately, most of the image data is lost in this process. Can things be changed so that the image is passed through the OGDI bridge/gateway at its full resolution, so that data loss does not occur? If you have any questions or comments, or want me to do some additional testing, etc., feel free to contact me at christik@fhu.disa.mil. Thank you very much! - Kevin Christiansen
Change History (2)
comment:1 by , 17 years ago
comment:2 by , 14 years ago
Description: | modified (diff) |
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Resolution: | → fixed |
Status: | new → closed |
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See #1877 where a new ADRG driver is proposed directly in GDAL (no need for OGDI bridge)