I defer to Lloyd's vastly superior understanding and explanation of the problem. But, you might find this trick useful (Greg Abram originally told me about it):
Given the 2D field (regular mesh topology) you want joined edge to edge (let's say in the 0 dimension: this need not be X in DX speak, but let's assume it is): slices = Slab(2dfield, thickness=0, dimension=0, position=(all)); slice0 = Slab(2dfield, thickness=0, dimension=0, position=0); sliceset = CollectSeries(slices, 0, slice0, 1);//order of arguments matters! cylindermesh = Stack(sliceset, dimension=0); Then do the spherical projection on cylindermesh. Viewing the 2D output will have long lines that cut across the surface, but after the projection the seam will be gone. Whether or not this changes the weather is up to you to determine. (:-). Poles are not joined, of course. a. The trick is Slabbing all with thickness 0 produces a 'series' object of 2D slices (without interpolation) from the position-dependent field. Then you copy the 0th slice and append it to the series. Stack makes a new 2D field with one additional column. b. The trick does not work with connection-dependent data. Chris Pelkie Vice President/Scientific Visualization Producer Conceptual Reality Presentations, Inc. 30 West Meadow Drive Ithaca, NY 14850 [EMAIL PROTECTED]
