How to "iron" a .btg file ?

[rleibner]

I am trying to improve SUAA airport.
Using WED, I've made a first draft and processed the suaa.dat with Airport Web Generator.
After placing the SUAA.btg.gz into my scenery/Terrain folder, I realize that many terrain undulations intersects my taxiways.
Modifying the airport altitude (in WED) does not fix the problem.

I guess that must "flatten" the area first.
Am I wrong?
How to do such task?

[SurferTim]

What are you using for elevation data? An hgt file?

[rleibner]

What are you using for elevation data? An hgt file?

I did not modified elevations yet (don't know how), but using the original ...TerraSync/Terrain/w060s40/w057s35/2018762.btg

[D-ECHO]

The Airport Web Generator ignores elevation and doesnt cut holes for the airport into the surrounding terrain, as it's just to test your layout. You need to run terragear to generate usable terrain.

[rleibner]

... You need to run terragear to generate usable terrain.

Honestly, I have tried many times to compile TerraGear. I've never been able to do it, it's beyond my ability.
Will there be another way to do it?
Maybe uploading the project to the X-Plane Airport Gateway ... perhaps some day FGFS will pick the design from there ... ?

[SurferTim]

... You need to run terragear to generate usable terrain.

Honestly, I have tried many times to compile TerraGear. I've never been able to do it, it's beyond my ability.
Will there be another way to do it?

It was for me too until today. I tried to build TerraGear a couple years back with no luck.
I read your post this morning, and tried compiling TerraGear with the download_and_compile.sh script.
http://wiki.flightgear.org/Scripted_Com ... ian/Ubuntu

Code: Select all

mkdir -p ~/flightgear
cd ~/flightgear
git clone https://git.code.sf.net/p/flightgear/fgmeta


After the clone,, I used this

Code: Select all

cd ./flightgear/fgmeta
./download_and_compile.sh -j4 TERRAGEAR


It compiled great. Looks like I may be in the scenery business soon.

Edit: My bad. Shoulda tested it first. It didn't compile.
It apparently failed when attempting to link genapts850

[rleibner]

This is how SUAA airport is seen according TerraSync:

and this is how it must be seen:


Unfortunately, cause the terrain elevations, I actually have:


Note: All streets and buildings (except the tower) are from OSM.
Other details are gathered from the AIP and on site observation.

[rleibner]

... Shoulda tested it first. It didn't compile. ...

One wish:
It would be great if someone were working to create a Terragear.AppImage
Am I dreaming too much?

[Fahim Dalvi]

Not an AppImage, but terragear does have a nice docker image to avoid the compilation hassle! I also wrote a small article to help people get started: http://wiki.flightgear.org/User:Fahim_D ... ing_Docker

Hope this helps!

[rleibner]

Not an AppImage, but terragear does have a nice docker image ...

Thanks for your help.

I followed the steps and have now a lot of .fit.gz files, among them the only tile I need:

Code: Select all

flightgear@6672f7968f1d:/terragear-work/ work/SRTM-3> ls w060s40/w057s35/2018762.*
w060s40/w057s35/2018762.arr.gz   w060s40/w057s35/2018762.fit.gz

From here I'm confused. Please note that I try to edit only the terrain heights on that tile (keeping untouched the landclass ...)
Briefly I have:

• the w060s40/w057s35/2018762.fit.gz file
• the SUAA.dat generated by WED & Flightgear Airport Web
• and all the 2018762.stg files provided by TerraSync

How must I process al together ?

[xDraconian]

I recommend reading the following:

http://wiki.flightgear.org/Using_TerraGear
https://forum.flightgear.org/viewtopic.php?t=35618
https://sourceforge.net/p/flightgear/fgmeta/ci/next/tree/fg-from-scratch/CustomSceneryProjects/Test/

[J-ROME]

Hi,

I have been searching for a while too....

here is how I have done for the DZ Les Bois in Chamonix 45.939011145739, 6.895890242314685


srtmchop DATA/SRTM/srtm_38_03/srtm_38_03.tif work/SRTM-3
terrafit -m 50 -x 4000 -e 2 work/SRTM-3
ogr-decode --max-segment 500 --spat 6.75 45.875 7 46 --area-type Default work/Landmass landmass/v0_landmass-master
genapts850 --input=./data/airports/DZCHAM.dat --work=./work
tg-construct --priorities=/usr/local/share/TerraGear/default_priorities.txt --work-dir=./work --output-dir=./output/Terrain --min-lon=6.75 --max-lon=7 --min-lat=45.875 --max-lat=46 AirportArea AirportObj Landmass SRTM-3


no need to bother too ;uch with .shp since I am using Orthophotos.

Cheers