Hi Dick:
Would I be correct that for purposes of imagery in MSFS,
EPSG:3857 is what is required since we are not dealing with a 'vertical datum' terrain mesh projection here ?
If so, the 'under-documented'
SBuilderX option can output a Geo-referenced
non-warped 1-piece
*.BMP for a background in a 3D modeling or airport design application.
I have previously tested / verified this easy work-flow to do that using downloaded imagery tiles in
SBuilderX.
To output a 1-piece
*.BMP of selected tiles from the
SBuilderX work-space in a
non-warped format for use in ADE or a 3D modeling application:
1.)
SBuilderX Menu > Edit > Edit INI file... (
SBuilderX.INI opens in NotePad)
a.)
In NotePad > SBuilderX.INI > Under [
Tiles] section, Edit:
ReprojectMercatorTiles=True
...and change it to read:
ReprojectMercatorTiles=False
b
.)
NotePad Menu > File > Save
c.)
NotePad Menu > File > Exit
2.)
SBuilderX Menu > File > Add Map > From Background
a.) Follow usual procedures to download / select tiles (do not compile to BGL)
3.)
SBuilderX outputs
non-warped format 1-piece
*.BMP /
*.TXT into:
[SBuilderX install path]\Tools\Work sub-folder
NOTE: For use in
ex: ADE, that 1-piece
*.BMP must first be processed in
ex: GIMP to make either numerous smaller tile segments, or very low resolution 24-Bit JPGs, so they can be "Added" as "Images" in ADE using UTM Metadata for use as background imagery 'tiles' loaded 1-at-a-time while working on the corresponding local area of KCCR in ADE.
CAVEAT: Restore normal SDK Resample compatible output of a 1-piece
*.BMP of selected tiles from the
SBuilderX work-space in a
warped format for use in making
ex: custom photo-real imagery land class terrain textures:
1.)
SBuilderX Menu > Edit > Edit INI file... (
SBuilderX.INI opens in NotePad)
a.)
In NotePad > SBuilderX.INI > Under [
Tiles] section, Edit:
ReprojectMercatorTiles=False
...and change it to read:
ReprojectMercatorTiles=True
b
.)
NotePad Menu > File > Save
c.)
NotePad Menu > File > Exit
AFAIK, alternatively, one may use
SAS Planet which also has GIS projection options for output of stitched tiles to make a 1-piece satellite image from downloaded tiles:
https://www.fsdeveloper.com/forum/t...nates-in-msfs2020-from-fsx.448906/post-854869
Hope this helps with these types of FS development tasks.
GaryGB