[gdal-dev] Re: Question about gdal2tiles

[Jukka Rahkonen]

Jorge Arévalo <jorge.arevalo <at> gmail.com> writes:

> 
> Hello,
> 
> I've a problem with gdal2tiles. I need to create tiles from an image
> of 5 GB, more or less. The image has been created rasterizing a
> shapefile. The shapefile's original projection was epsg:23028, but I
> had to reproject it to epsg:23030 (because I had to cross this
> shapefile with other ones in epsg:23030). To reproject, I used this:
> 
> ogr2ogr -s_srs epsg:23028 -t_srs epsg:23030 -f "Mapinfo File" dst.mif src.mif
> 
> Then, I rasterized the shapefile reprojected.
> 
> After this, I execute gdal2tiles, using resampling method 'near', but
> it takes a loooooooooong time to complete the process. With other non
> reprojected shapefiles (in epsg 23030 originally), the process is much
> faster. What am I doing wrong?
> 
> Thanks in advance, and best regards

Hi,

Have a look at gdalinfo reports about the slow image and about one of the fast
ones.  Check if there are considerable differences in image sizes in pixels. If
images are about as big then look at the file formats and see if they are
somehow different.

-Jukka Rahkonen-