On 16 August 2012 13:11, Grant Slater <[email protected]> wrote: > On 16 August 2012 12:36, Craig Leat <[email protected]> wrote: >> Nice work Grant! I found gaps too and most resulted from incorrect >> georeferencing embedded in the sid or tif file. The world files were >> correct, but gdal ignores them and gives precedence to the embedded >> georeferencing. I had to create gdal vrt files and fill them with the >> information from the world files. >> > > The method I ended up using was building gdal vrt files from the 9 > zones. I then built external gdaladdo overviews. > I then use mapserver to serve the 9 zones as layers with "OFFSITE 0 0 > 0" to turn pure black to transparent so that the zones overlap. >
Ah! should have said... I too found a few files with incorrect embedded details, I used gdal_translate to rewrite them. Command: gdal_translate -a_srs '+proj=tmerc +lat_0=0 +lon_0=25 +k=1 +x_0=0 +y_0=0 +datum=WGS84 +units=m +no_defs ' -of GTiff -co "TILED=YES" -co "COMPRESS=DEFLATE" -co "PREDICTOR=2" -co "ZLEVEL=9" -co "TFW=YES" *infile* fix/*outfile* The problem files where 2825A[ABCD]* Regards Grant _______________________________________________ Talk-ZA mailing list [email protected] http://lists.openstreetmap.org/listinfo/talk-za
