Hi Ammar.
Please keep the discussion on-list, that way prospectively others can help
too.
If the data does it in QGIS too then it's almost certainly a no-data issue.
I can't suggest how to resolve that as I don't know anything about your
dataset.
Regards,
Jonathan
On 14 January 2014 11:10, Ammar <[email protected]> wrote:
> Jonathan,
>
> First, I am really sorry about the last name thing. Probably I was working
> like a mule at the time I created the post.
>
> When I load the files directly into QGIS, I get the same white lines and
> distortions. When zooming in, the lines disappear at certain levels then
> after zooming in more, I get them back! It is like they are coming and
> going. The thing is, the lines happen exactly at the borders of each of the
> 21 merged Images!
>
> Any ideas?
>
> Regards,
> Ammar
>
>
> ------------------------------
> *From:* Jonathan Moules <[email protected]>
> *To:* Ammar <[email protected]>
> *Cc:* "[email protected]" <
> [email protected]>
> *Sent:* Monday, January 13, 2014 4:44 PM
> *Subject:* Re: [Geoserver-users] White lines in merged GeoTIFF files
> after ImageMosaicing
>
> Hi Ammar,
>
> The commands that I used are: (recommended by Jonathan
> Mule)<http://osgeo-org.1560.x6.nabble.com/Tips-on-serving-Orthophotos-as-ImageMosaic-tt5093083.html#a5093104>
>
> That's an original spelling of my last name. ;-)
>
> Do the images mosaic together neatly in something like QGIS when loaded as
> separate files? There may be whitespace as Alessio says. Does the
> whitespace appear/disappear as you zoom in/out?
> Cheers,
> Jonathan
>
>
> On 12 January 2014 18:31, Ammar <[email protected]> wrote:
>
> 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)
> <http://osgeo-org.1560.x6.nabble.com/Tips-on-serving-Orthophotos-as-ImageMosaic-tt5093083.html#a5093104>
>
>
> 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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