I had an ENVI user post this question:


"I've been trying to mosaic several rasters (each representing a different city in my location) into a single raster. The mosaic preview suggests that this is doable. The processing also seems to finish. However, no mosaic output file is generated. Is there a file size limit on individual rasters? Assuming that the 'no data' areas between rasters are not adding much to the file size, the input rasters should add up to about 9 GB. Do you have any ideas for tackling this problem?"


My reply to this user's question is:
There should be no limit to the file size for rasters when mosaicking imagery. What is the method or process of mosaicking you are following?
If they have access to ENVI+IDL, a good method of troubleshooting this would be to open the IDL Workbench, and then in the IDL Console, open ENVI in /debug, /verbose mode, like so:


IDL > e = envi(/debug, /verbose)


Then continue with the mosaicking workflow. Opening ENVI like this will output a lot of stuff during the processing that could pinpoint to what is occurring. For that ENVI user, please provide a copy of that output in a comment below.


Some handy help links in addition for reference;
Error Handling in ENVI: http://www.harrisgeospati...s/errorhandling.html
Mosaicking in ENVI (with links to tutorials): http://www.harrisgeospati.../MosaicSeamless.html