Air21 was an airline based at Fresno that was founded in January 1994 and lasted until January 1997. They operated a fleet of five Fokker F28s with seating for 64 passengers.
A few days ago, Departed Flights shared a route map for Air21 generated using the Great Circle Mapper using data from their schedule for 4 March 1996. The map used geodesic paths, which for Air21's short routes are nearly straight lines, plus it creates an ugly crossing of the FAT-LAX and SFO-PSP routes. This is the sort of map for which the new Bézier paths were created.
Today's Featured Map recreates Air21's 4 March 1996 route map using Bézier paths. All but one of the paths use a Bézier configuration of 25%@-30°, which places the first control point for each segment 30 degrees to the left of the geodesic path at 25% of the path distance. The second control point is 30 degrees to the right of the reverse path. How these paths are plotted depends upon the ordering, e.g., FAT-SFO won't be drawn the same as SFO-FAT. Careful tinkering with the order allowed a single Bézier configuration for almost all of the map.
Information on this site may not be accurate or current and is not valid for flight planning or navigation. No warranty of fitness for any purpose is made or implied. Flight planning and navigation should only be done using official charts.
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Karl L. Swartz.
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