![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg4KJzD3no_f6Nn6sPedq7iksm9qqiCjSJuCX1-fGZeoi5p_I30Gc_d72CWNx8tYFyn2_27i9c2HKn61EbkWqJRT2d9U2x7tWrCyAI5pdwZPi7AOrV7Rv4wC4CBw-x5Gt_5oFj7/s320/fuji.jpg)
Of course, the objective is to get to a whole-earth scheme. I'm going with a projected cube approach, where the basic seamless algorithm is run on the six sides of the cube. I like the Quadrilateralized Spherical Cube which was developed for processing the data from the NASA Cobe satellite. A nice property of the projection is that is equal-area, so that a recursive devision in the cube face space should result in 4 equal-area spherical quads on the earth. It looks pretty:
Here's hoping that the calculation of the projection doesn't become a big bottleneck. Incidently, it was very hard to find the equations describing the projection: I eventually found a nice formulation here. But beware: there's a typo in Equation 3-38. "cos(theta)" should be "cos(phi)."