Hi again Jukka,
- gdalinfo report of one of the originals
See the attached .txt file
- the nature of images (aerial/satellite images or raster maps)
Aerial images.
- the exact gdal commands you have been using
gdal_translate -a_srs "EPSG:3011" in.tif out.tif
gdal_translate -co compress=deflate -co predictor=1 -co "TILED=YES" -co
"BLOCKXSIZE=512" -co "BLOCKYSIZE=512" in.tif out.tif
gdaladdo -r average file.tif 2 4 8 16 32
gdal_merge.py -v -o mosaic.tif -of GTiff --optfile tiff_list.txt
Thank you for your help.
Regards,
Ammar
________________________________
From: Rahkonen Jukka <[email protected]>
To: "[email protected]"
<[email protected]>
Sent: Friday, December 6, 2013 2:04 PM
Subject: Re: [Geoserver-users] Tips on serving Orthophotos as ImageMosaic
Hi,
Show us
- gdalinfo report of one of the originals
- the nature of images (aerial/satellite images or raster maps)
- the exact gdal commands you have been using
It seems that you are using same kind of work flow that you presented in your
question in gdal-dev mailing list and you repeat the same error as well.
Gdal_merge does not honour the work you have done in previous steps with tiles,
compression and overviews. It creates a new bigtiff file for use and if you use
the defaults the result will be uncompressed tiff without inner tiling.
-Jukka Rahkonen-
________________________________
Ammar wrote:
Hello list,
I have 20,000 of TIFF+TFW files that I want to serve in GeoServer 2.4.1 as WMS.
I have followed the GeoServer on
Steroids<http://elogeo.nottingham.ac.uk/xmlui/bitstream/handle/url/226/gs_steroids_sgiannec_foss4g2013_01.03.pdf?sequence=1>
notes and I did the following:
1. Added projection using gdal_translate
2. Added inner-tiles (512 x 512) using gdal_translate
3. Added overviews (2 4 8 16 32) using gdal_addo
4. Compressed the dataset with LZW method using gdal_translate
5. Created one big GeoTIFF file using gdal_merge.py
I have tested the above on a small set of 150 TIFFs and the result was one big
GeoTIFF of 10.8 GB size. I have 10,000 TIFFs and this way I will end up with
roughly 100 GeoTIFF files having a size of 10GB each which is far more than the
original size of all the TIFF files!
I have a couple of questions:
1. What compression method do you recommend? (I am currently testing with LZW
predictor=1, LZW predictor=2, Deflate predictor=1 and Deflate predictor=2).
2. Are the overviews enough? Do I need to generate more overviews? (e.g 64 128)
3. What resampling algorithms are most recommended? Where can I read about
resampling algorithms?
4.
5. Any tips or recommendations?
Best regards,
//Ammar
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gdalinfo 6585600_198200.tif
Driver: GTiff/GeoTIFF
Files: 6585600_198200.tif
6585600_198200.tfw
Size is 4000, 4000
Coordinate System is `'
Origin = (198200.000000000000000,6585800.000000000000000)
Pixel Size = (0.050000000000000,-0.050000000000000)
Metadata:
TIFFTAG_RESOLUTIONUNIT=2 (pixels/inch)
TIFFTAG_XRESOLUTION=96
TIFFTAG_YRESOLUTION=96
Image Structure Metadata:
INTERLEAVE=PIXEL
Corner Coordinates:
Upper Left ( 198200.000, 6585800.000)
Lower Left ( 198200.000, 6585600.000)
Upper Right ( 198400.000, 6585800.000)
Lower Right ( 198400.000, 6585600.000)
Center ( 198300.000, 6585700.000)
Band 1 Block=4000x1 Type=Byte, ColorInterp=Red
Band 2 Block=4000x1 Type=Byte, ColorInterp=Green
Band 3 Block=4000x1 Type=Byte, ColorInterp=Blue
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