blcjr wrote in Mon Sep 05, 2016 1:22 pm:I'm guessing (WAG) that the airport is built on a "base" that overlays the underlying topography (i.e., terrasync would otherwise show Lake Hood).
This is not how scenery works in FlightGear. There are not layers, and the different terrain types cannot overlap or you get the infamous "flooded airport bug":
https://www.google.es/search?q=site:forum.flightgear.org+flooded+airportHence, the terrain is created with holes where you fit airports, lakes or whatever. These "holes" are not created "on the fly" since computations could take many hours. These are created offline during the scenery building process with the terragear toolchain:
http://wiki.flightgear.org/TerraGearSo the process goes as follow: if you don't have accurate data available (this is the case for most of the world, including USA: there is only accurate data for Europe), you can draw the terrain types manually using for example QGIS (
http://www.qgis.org) using as many layers as you need, and then process the shapes with terragear.
This procedure is long and tedious, and only a few FlightGear users are willing to follow it. As a result, terrain in FlightGear does not change very often.
If I understand psadro's message correctly, this process may be greatly simplified in the near future:
viewtopic.php?f=5&t=29693&start=30#p293292It looks to me like Palmer Muni (PAAQ) -- NW of Anchorage across Knik Arm -- is "improved" as well, but is not listed here as an improved airport.
The list included in the first post is heavily outdated. You can find a much more updated map here:
http://iveze.nl/fgmap/