I have country border lines as a polygon and want to convert them in polylines....but the result should be that tere is only one line on a common border.....so no double lines...
Thanks and Greetz
Franco
Question
geometry coercer
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+15- Contributor
Coerce the polygons to lines.
Use topologybuilder, input the lines.
Output lines is result u wish.
+11- Contributor
i tried that....he splits the polygons in polylines...thats ok...but i have two lines on a acommon border...can i remove that when they are same in geometry?
+15- Contributor
You can use the matcher. Match 2D and set lenient matching to yes.
Output sinlgematched and not matched.
The TopologyBuilder generates a single line for a shared boundary of adjacent areas if the boundary lines exactly match. I guess there are slight gaps between them.
If so, the Matcher doesn't work as expected unfortunately.
Firstly check if there are such gaps.
+15- Contributor
Hi Takshi,
You would expect that, but it is not true.
If i use topology builder on community dataset (community borders), wich is topoligy correct, no gaps no overlaps, it does create 2x the edges where they match.
Franco is right, so a matcher is required. Also it must be set to lenient matching else it will not match (wich i find strange).
Maybe the transformer is flawed?
+11- Contributor
Hi all,
the interesting thing that the result is that sometimes there is only one line, sometimes there are two lines....hmmm...
+15- Contributor
correction.
When u enter the areas in the topologybuilder this is true, u get 1 line at borders. (wich is where Takashi is right..)
When u coerce them first to polylines and enter the polylines in the topology builder, you get double lines at borders..
Really?
I always can get single lines for common boundaries, if those are exactly match.
Strange.