Getting Square power of 2 data

[rossoe 46]

I've been using the below wiki to help me build a terrain 40960 x 40960

http://pmc.editing.wiki/doku.php?id=arma3:terrain:satellite-texture-terra-incognita

 

I grabbed a sat image from Terra Incognita which was larger then 40960 - perhaps in the region on 50000 (saved as oziExplorer map)

 

I then grabbed terrain data from  http://opentopo.sdsc.edu/lidar?format=sd which was larger than I needed - (saved as asc)

 

I've opened Global Mapper and set UTM and 31 - ** assume this is correct for a map from south of England? ** are we forced to use this setting for Terrain Builder ?

 

I've imported the terrain into Global mapper

 

then created a map catalog and imported the map tiles saved from Terra

 

 

But when I then goto to select an area 40960 x 40960 using Digitizer tool - 'advanced feature creation options → create regular grid of user-specified'

 

i then get:

 

 

 

Because my 40960 selection does not fit within the sat images - (and I was sure i picked a larger area for Sat image) - I'll have to download even bigger image

 

Should I not worry about the original size of terrain and sat image - and just get larger than required for both, and then once in global mapper, select the 40960 x 40960 ready to import both to terrain builder

[RoF 241]

Just download the missing bits. Or if you want them to be water, just paint over that bit in photoshop