I've river polygon data representing the water quality. This polygon data were derived from polyline dataset according to a buffer distance in the attribute table. Unfortunately I don't have this line dataset. So my "possibly naive" question is - is it possible to "re-buffer" the polygon data set to have polyline data again? Maybe there is a way to draw the centerline of each polygon?
I prefer to work with qgis 2.6 but also have ArcGIS 2.2 available.
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Chad Cooper
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parallax
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sorry, but this functionality supplies the outline of the whole polygon. I need the center line. – parallax Dec 09 '14 at 12:39
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Ah yes sorry, in that case take a look at this:http://gis.stackexchange.com/questions/33887/finding-centrelines-from-polygons The ET geowizards Create centerlines works well, but you may be limited to the number of features you can work with in the free version. – MAJ742 Dec 09 '14 at 12:51
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Look at this also http://gis.stackexchange.com/questions/177/simplifying-polygons-to-linestring/215#215 – user30184 Dec 09 '14 at 12:51
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Manual of OpenJUMP skeletonizer is good reading even if you will use other tools. It is included in the zip http://sourceforge.net/projects/jump-pilot/files/OpenJUMP_plugins/More%20Plugins/JUMP%20Skeletonizer%20Plugin/ – user30184 Dec 09 '14 at 13:00