Links
Here are some links which you may find useful when it comes to real-world navigation data.
NIMA Digital Aeronautical flight Information File (DAFIF)USGS Digital Elevation Model (DEM)
USGS 1:250K DEM Selector
NOAA Coastline Database
Mac Radar Scope
Advanced Simulated Radar Client
Sites Serving Gndmaker-Generated Files
VATSIM Ireland VACCIrish Flight Sim Design
VATSIM Pacific Division
VATSIM European Division
Cool places
Northwest International Biplane Fly-In (which I'm affiliated with).Okotoks Flying Club (which I'm the current President of).