<html><body><div style="color:#000; background-color:#fff; font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:12pt"><div>Dear list,</div><div><br></div><div style="color:rgb(0, 0, 0);font-size:16px;font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;background-color:transparent;font-style:normal;">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 <br></div><div style="color:rgb(0, 0, 0);font-size:16px;font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;background-color:transparent;font-style:normal;"><br></div><div style="color:rgb(0, 0, 0);font-size:16px;font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;
background-color:transparent;font-style:normal;">What could be the reason behind having those white lines?</div><div style="color:rgb(0, 0, 0);font-size:16px;font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;background-color:transparent;font-style:normal;"><br></div><div class="yiv1171687671yui_3_13_0_ym1_7_1389348331477_6" style="color:rgb(0, 0, 0);font-size:16px;background-color:transparent;font-style:normal;">The commands that I used are: (<a rel="nofollow" target="_blank" href="http://osgeo-org.1560.x6.nabble.com/Tips-on-serving-Orthophotos-as-ImageMosaic-tt5093083.html#a5093104"><span>recommended by Jonathan Mule on Geoserver mailing list)</span></a></div><div class="yiv1171687671yui_3_13_0_ym1_7_1389348331477_6" style="color:rgb(0, 0, 255);font-size:16px;background-color:transparent;font-style:normal;font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;"><br></div><div
class="yiv1171687671yui_3_13_0_ym1_7_1389348331477_6" style="color:rgb(0, 0,
255);font-size:16px;background-color:transparent;font-style:normal;font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;"><span style="color:rgb(0, 0, 0);"> <br></span></div><div class="yiv1171687671yui_3_13_0_ym1_7_1389348331477_6" style="color:rgb(0, 0, 0);font-size:16px;background-color:transparent;font-style:normal;font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;"><span style="color:rgb(0, 0, 0);"> gdalbuildvrt -srcnodata 255 -vrtnodata 255 -a_srs EPSG:27700 -input_file_list tiff_list.txt mosaic.vrt<br></span></div><div class="yiv1171687671yui_3_13_0_ym1_7_1389348331477_6" style="color:rgb(0, 0, 0);font-size:16px;background-color:transparent;font-style:normal;font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;"><span style="color:rgb(0, 0, 0);"><br></span></div><div class="yiv1171687671yui_3_13_0_ym1_7_1389348331477_6"
style="color:rgb(0, 0, 0);font-size:16px;background-color:transparent;font-style:normal;font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;"><span style="color:rgb(0, 0, 0);">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<br></span></div><div class="yiv1171687671yui_3_13_0_ym1_7_1389348331477_6" style="color:rgb(0, 0, 0);font-size:16px;background-color:transparent;font-style:normal;font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;"><span style="color:rgb(0, 0, 0);"><br></span></div><div class="yiv1171687671yui_3_13_0_ym1_7_1389348331477_6" style="color:rgb(0, 0, 0);font-size:16px;background-color:transparent;font-style:normal;font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;"><span style="color:rgb(0, 0, 0);">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</span></div><div class="yiv1171687671yui_3_13_0_ym1_7_1389348331477_6" style="color:rgb(0, 0, 0);font-size:16px;background-color:transparent;font-style:normal;font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;"><span style="color:rgb(0, 0, 0);"><br></span></div><div class="yiv1171687671yui_3_13_0_ym1_7_1389348331477_6" style="color:rgb(0, 0, 0);font-size:16px;background-color:transparent;font-style:normal;font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;"><span style="color:rgb(0, 0, 0);">Thank you in advance</span></div><div class="yiv1171687671yui_3_13_0_ym1_7_1389348331477_6" style="color:rgb(0, 0, 0);font-size:16px;background-color:transparent;font-style:normal;font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;"><span style="color:rgb(0, 0, 0);"><br></span></div><span style="color:rgb(0, 0, 0);">//Ammar
</span></div></body></html>