Demonstrates map tiling artifacts, and OpenLayer's facility for correcting this distortion.
When you render tiles with certain types of symbols, there are artifacts
at tile edges that make symbology not look continuous. In the center of
the above map (when it first loads), the large orange road is split
vertically by a tile. Open the layer switcher and change to the layer
with a 15 pixel gutter to see how the symbology looks nicer.