On Saturday, January 25, 2020 at 12:57:41 AM UTC-5, wrote:
Are you familiar with the soaring turnpoint exchange? Do you have Seeyou? Assuming you don't have seeyou, you can download the google earth format for the database in the area of interest from the soaring turnpoint exchange (try internet explorer if Google doesn't link) and view it in google earth. And you could also convert any database you have into google earth using gpsvisualizer. Then display both in GE and toggle them on and off to try and find any discrepancies so you could edit the file in the oudie to your liking. Also, you can filter waypoints in a variety of ways in the oudie, "landable" for example, and that would limit the database to airports and airstrips (for the most part, it's not perfect) . It's a bit of work without seeyou but it can be done. Google earth is nice anyway because you can look at landouts against the latest aerial imagery and get a feel for the landouts. Hope that points you in a direction.

There is also the excellent resource http://soaringdata.info/airports/waypoints.php . Enter an airport identifier and bounding radius. Add the TP file. Check the .KML (for Google Earth) box. Add airspace, which is always handy. Type Soar in the box and press submit.

Output then, is a .cup file, an airspace file, and a KML file (and any others you click). Click on the KML file and Google earth loads - click on each airport and zoom in.

It's also a great resource for translating .cup files into others for those with different equipment. I use it to translate .cup files into .STX files for my Clearnav vario. Thanks Lynn Alley (2KA)!