illustrator polygon center line
Posted 18 December 2008 - 05:49 AM
Let's say I have a road element in Illustrator, and I want to redesign it. But now, this road is designed as a closed path, and the look of it is the fill of the path. In GIS-speak, it is a polygon.
Now, how can i (in Illy) get this back to a unclosed path (e.g. line feature) that I can style with the stroke... ?
Posted 18 December 2008 - 08:44 AM
I can add that I can cut up the closed path to two nearly parallel paths easily - but that doesn't help me that much, since they are not parallel...
ET GeoWizards for ArcMap allows you to create centrelines from polygons, see attached.
Posted 18 December 2008 - 12:34 PM
You have to expand after using the tool to edit the centerline.
Do this on two roughly parallel lines, not a polygon.
Cartographer, Bureau of Land Management
Oregon State Office
Posted 18 December 2008 - 01:27 PM
[I wonder how many people had placed bets on me coming up with an FME-related answer]
Email: email@example.com / Twitter: @redgeographics
Posted 18 December 2008 - 02:50 PM
I often create rivers by drawing an approximate centerline and then expanding it into a polygon. I've learned to save the centerlines on a hidden layer in case I later need them for state or municipal boundaries, etc.
Posted 18 December 2008 - 03:32 PM
For ArcMap and FME answers - I don't want to go through the hassle to take these into GIS. Actually this is not a map, but a chart (not that it really matters).
Dennis - Illy doesn't have that functionality, as far as I know, one could do it using path finders, but that is too much of a hassle. I think blends was the best bet, but it doesn't work in my case - I am retracing...
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