I published a paper on a highly adaptable equal-area projection that I developed. It’s pseudoconic, so the parallels in normal aspect are arcs of concentric circles. Depending on parameterization, the arcs can become straight lines, yielding pseudocylindric projections.
The projection is a generalization of both the Bonne and the Albers equal-area conic projection, and so, in a sense, it “blends” them, although the blending is not a linear function. You can vary four parameters to customize the projection, so it’s particularly handy for animated or Web-configurable situations.
Depending on parameterization, you can achieve any configuration of Bonne or Albers; sinusoidal; Collignon; a very close approximation of Kavraiskiy V; and Werner, which is itself a degeneration of Bonne.
This will go into Geocart’s next release.
Some samples:
- Typical jellybean configuration
- Jellybean.jpg (109.94 KiB) Viewed 1382 times
- A kinder, gentler Albers
- Kinder.jpg (109.9 KiB) Viewed 1382 times
- Very similar to Kavraiskiy V pseudocylindric
- Kavraiskiy.jpg (99.66 KiB) Viewed 1382 times
- A melted Hershey’s Kiss?
- Melted.jpg (106.64 KiB) Viewed 1382 times
- Asymmetric pseudocylindric UFO
- UFO.jpg (101.66 KiB) Viewed 1382 times
— daan
