Dave, it looks to me like you're seeing effects of collision avoidance
in label cacheing. I would expect those artifacts to be more extreme
near the edges of the images.
I wonder what would happen if you greatly increased your edge buffer.
If you need a 4096x4096 tile, then produce a
The primary thing going on here is that MapServer computes label placement AFTER
features are clipped to the area of interest. It's a necessary step especially
with
linear features as a single label point doesn't always make sense. Since the
algorithm places the label at the center of the
