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Tip: GP Polys with Cusps


I don't have a tutorial, but here is a tip ;)

If a GP line contains a cusp, don't end lines at the cusp, include the cusp in a containing line.

The following shows a closed contour containing two cusps. Note where the segments end:

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Thanks George, a nice one.
In addition to your tip: the same principle applies to other vector lines, too. For instance if you want to connect shore lines or road segments you always should try to to overlap or connect in-midst a straight part in order to avoid half-sided gaps caused by an angle between the bordering textures.