CAG:
Thanks for confirming what I suspected. And thanks for the tip that the tile layout is in the MM file. I've now figured out how the tile layout works and am experimenting with adding tiles to missing locations -- a bit of a laborious task.
The "missing tile" is easy enough to spot once you've loaded my custom tile set. Download the latest NVN-MAP package:
https://netfiles.uiuc.edu/ehowes/www/fa/NAM-MAPS.zip
Then simply load the NVN-TEXT.LIB. (You can use it with the default FA NVN map or one of my custom maps.) At about 10,000 ft the "missing tile" is easy spot. One good location is just north of Haiphong. There's another just north of Hanoi. And if you fly around, the other locations become apparent as well.
By my count there are 1235 active tiles in the default NVN map. If you have an estimate as to how many tiles the map might hold (or any other advice for that matter), it would be most appreciated.
Best,
Eric L. Howes