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FSX File Naming Convention with SplitFileLOD?

I'm doing a largish 1m photoreal with a single .inf using SplitFileLOD=9 to keep the .bgls from going over 2Gb. It works great, but there are 27 .bgls so far with filenames like this:


I use DestBaseFileName="valles_photo_1m_" in the .inf and SplitFileLOD appends the numbers, but for the life of me I can't figure out how they relate to any particular LOD9 cell or geographic location. Does anyone know? I'd like to be able to isolate a particular .bgl because it takes 3 hrs to resample this whole mess. I've got a couple .tifs I've changed and if I knew which .bgl is which I think I could make a cut-down .inf and only resample the .bgls affected by the changes in the .tifs. I can open them one by one in TMFViewer of course and by process of elimination (nope, that ain't it, that ain't it either... :) ) figure it out, but there must be some logic behind the numbers?



Staff member
FSDevConf team
Resource contributor
Hi Jim,

It's the same naming convention as used for AGN files, except that these so down to another LOD level. So these numbers define the LOD tile of your scenery.
Thanks Arno, I thought they looked suspiciously like .agn filenames. TBH I never understood those either, lol. I get it now, QMID11 cell 313,305 becomes 03130305 in the .bgl filename. I should have caught that but I missed it completely! :oops:

That was slick, I just changed BoundingCell=7,19,19 in my .inf to BoundingCell=11,313,305 and it pooped out a new valles_photo_1m_03130305.bgl with the .tif modifications in about 5 minutes flat! I didn't remove any superfluous sources or anything, resample just ignored the ones outside the BoundingCell. Perfect!

Thanks again!