I have been asked to point out that these High resolution airfield outlines are created for Kinetic and are Copyright to Kinetic.
And beware if you are using these outlines and then posting images (eg via. FTP). Be sure to make it clear that the high-resolution airfield outlines are created for Kinetic and are Copyright to Kinetic.
Yes, in fact that will hold for pretty well any outlines that are published on the Net, whether copyright is explicity asserted or not, although many enthusiast outline authors take a fairly relaxed view.
The only exceptions that I'm aware of in the public domain are some generated by the flight simulator community (I may be wrong about those) and the ultra-high-res ones published by the FAA under the auspices of its Safe Flight 21 program, which are superbly detailed, albeit a little out-of-date now.
Having said that, if you reproduce something that's being given away for free in the first place, it's fairly difficult (though not impossible) for the original copyright holder to demonstrate that they have suffered loss or damage as a result.