[gdal-dev] White lines in merged GeoTIFF files

[Ammar]

Dear list,

I have merged 21 GeoTIFF images using GDAL utilities. Each image is the 
result of merging 500 smaller tiles. I am using ImageMosaic in Geoserver but I am getting a mosaic that contains white lines 


What could be the reason behind having those white lines?

The commands that I used are: (recommended by Jonathan Mule on Geoserver mailing list)

   

gdalbuildvrt -srcnodata 255 -vrtnodata 255 -a_srs EPSG:27700 -input_file_list tiff_list.txt mosaic.vrt


gdal_translate -of GTiff -co TILED=YES -co BIGTIFF=YES -co COMPRESS=JPEG -co 
JPEG_QUALITY=80 -co BLOCKXSIZE=512 -co BLOCKYSIZE=512 -co 
PHOTOMETRIC=YCBCR mosaic.vrt mosaic.tif


gdaladdo mosaic.tif -r average --config COMPRESS_OVERVIEW JPEG --config JPEG_QUALITY_OVERVIEW 60 --config 
INTERLEAVE_OVERVIEW PIXEL --config PHOTOMETRIC_OVERVIEW YCBCR 2 4 8 16 
32 64 128 256 512

Thank you in advance
//Ammar  
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