Keeping in mind that I don't really speak perl . . .I was trying to understand the tile number calculation, and came upon a bit that doesn't make sense to me in the tile_index function. It looks like it doesn't handle near-polar latitudes correctly -- like it resets the longitude (which never gets used again, so why reset it?) when it should be setting the variable "x" that covers the low-order bits of the tile number. "x" gets set for latitudes in the range -83 <= lat <= 82; but for latitudes closer to a pole than that, "$x" is unset before adding to the tile index number. Should those resettings of $lon be setting $x instead?
-c
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Chris Metzler [EMAIL PROTECTED]
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