This is a bit off topic as the topic is about the scenery objects (for example buildings radio masts in the scenery), but I answer here anyway.
FGRS wrote in Fri Feb 21, 2014 11:45 am:How to edit /change the overall layout of the airport?
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In FlightGear,all of this is just a grass field with something like an airstrip. So my question is,how to change that?
It is a bit of work, even more so if you want to see it within a month, as you then would have to regenerate the scenery tile with the airport.
FlightGear uses the same airport data as X-Plane does. The difference is that while X-Plane drapes the airport layout over the terrain, while FlightGear must have the scenery regenerated using external tools in order to use the new layout.
To edit the airport layout you use
WED (World EDitor), developed in the X-Plane community, and for scenery generation you use the
TerraGear tool chain or the much simpler
TerraGUI. To edit the ground networks used for starting positions (other than the runway threshold) and for and AI taxi and pushback routes, you will have to use
TaxiDraw.
The new layout should be sent off to the maintainer of X-Planes airport and navigation data, and will in that way appear in FlightGear later on, when the TerraSync Scenery is regenerated (unless you create custom scenery yourself using TerraGear).
EDIT: While factually correct, disregard the above.
Having looked at the airport in the new TerraSync Scenery I think I quite misunderstood you.
I guess you want to add buildings etc. to the airport. In that case you are at the right spot and on topic.
Fortunately, these changes can be done a
lot easier that the above mentioned,
and you will see the changes a lot sooner.
Adding buildings is actually rather easy these days, and they will be available in TerraSync usually well within two weeks. The tools you use is the
UFO which is
capable of placing shared objects as well as custom buildings (which can be created using for example Sketchup or Blender). Using the UFO you can dump the positions to FlightGear's log file and you can then add them to the
scenery object database using web forms.
The trickiest part for me when I tried a couple of years ago it was to figure out how to dump the positions and how to add them to the web forms.