The NODATA value are set by matching/replacing strings in the raw XML source of the VRT files.

This no longer works as a 'space' is now present... (tested with GDAL 1.11.2)

Needs (at least) a more robust parsing of the XML

The generation does not format the values anymore, for example, a generated googlemaps.html contains :

            var mapBounds = new GLatLngBounds(new GLatLng(%(south)s, %(west)s), new GLatLng(%(north)s, %(east)s));
            var mapMinZoom = %(minzoom)s;
            var mapMaxZoom = %(maxzoom)s;

Depending on cases, the input files are said to be non-existing, or output folders may change (path truncated to last accent for example)

For exemple, the output path "C:\temp\MACTe_test\Boite_A_Fichiers_recompos_s\Boite A Fichiers recomposés\ABANCOURT-00069-4" becomes "C:\temp\MACTe_test\Boite_A_Fichiers_recompos_s\Boite A Fichiers recomposABANCOURT-00069-4"

The ECW cache is configured to use 1/4 of the available RAM, which will cause troubles with multiple processes !

The ECW_CACHE_MAXMEM config/environment value can allow to control that outside of gdal2tiles.

Currently black with alpha=0, this alpha is lost with jpeg output.