<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">Hi,<div><br></div><div>I have a set of aerial ortophoto images. I have done the following:</div><div><br></div><div>1. gdal_translate -co "TILED=YES" on all of them</div><div>2. gdaladdo 2 4 8 16 on all of them</div><div>3. gdaltindex</div><div><br></div><div>The problem is - artifacts appear in the lower right corner of each raster file (tiled and overviewed). They ave different colors depending of the scale. For example, on 1:15000 scale they appear as yellow squares. On 1:10000 scale they appear as blue <span class="Apple-style-span" style="font-size: 11px; ">_| (reverse "L"). </span> On 1:5000 they disappear</div><div><br></div><div>I investigated and found out this happens after using gdaladdo. I am using gdaladdo from gdal-bin on 64bit debian. The version of gdal-bin is 1.5.2-3. I saw similar issues reported in ticket #2346 2 years ago. Should I use newer GDAL library?</div><div><br></div><div>regards, dejan</div></body></html>