This is similar to a question asked by someone else, re OS tiles. However, there is a difference!
I have a large number (over 10k) of georeferenced png files which I have mosaicked in ArcMap, but also want to be able to access them in other programs such as QGIS over the web and within a private network using GeoServer. I have tried creating VRT's with them, and sometimes it works, but sometimes it doesn't. It seems that on selecting over 200-odd png's, the vrt stops being created.
Is there a limit on the amount of rasters for a VRT?
The error message is:
The process failed to start. Either the invoked program is missing, or you may have insufficient permissions to invoke the program.
and the code is:
gdalbuildvrt -allow_projection_difference
"F:/Historic Buildings/GIS/Data/Mapping/Landranger/Raster/15k/Data/SX/SX.vrt"
"F:/Historic Buildings/GIS/Data/Mapping/Landranger/Raster/15k/Data/SX/1.png"
"F:/Historic Buildings/GIS/Data/Mapping/Landranger/Raster/15k/Data/SX/2.png"
"F:/Historic Buildings/GIS/Data/Mapping/Landranger/Raster/15k/Data/SX/3.png"
"F:/Historic Buildings/GIS/Data/Mapping/Landranger/Raster/15k/Data/SX/4.png"
"F:/Historic Buildings/GIS/Data/Mapping/Landranger/Raster/15k/Data/SX/5.png"
"F:/Historic Buildings/GIS/Data/Mapping/Landranger/Raster/15k/Data/SX/6.png"
"F:/Historic Buildings/GIS/Data/Mapping/Landranger/Raster/15k/Data/SX/7.png"
with an additional +200 similarly addressed png's
I am using QGIS 1.8.0 Lisboa, on Windows 7 64bit.