So in essence, I'd like to identify all edges where my attribute is valued as "Y".
Thanks,
Finding isolated edges
Hi there, I'd like to know the simplest way of identifying isolated edges based on different attribute values. See the attached image for an example:
+3
Im not sure if i understand the question but is it not just a tester to test for the value?
Or are ther more criteria that identifies it as "isolated"?
To me, an isolated edge would be an edge that does not share a (partial)boundary with another object.
In that case u can use a spatialrelator to find them with a list. The list will have only one (ID) entry for that object.
Hi Gio,
Yes, sorry for the lack of clarity. I think I just missed a section a typed for the question. A more accurate description would be all scenarios where an edge with attribute "Y" either connects to nothing, or only connects to edges with attribute “X”.
That’s what I mean with isolated, in the sense that it’s not part of a network of “Y” attribute edges, but instead a loose segement that either connects to only “X” attribute edges, or nothing at all.
Hope that makes more sense, and sorry for the original post's limited information.
Userlevel 4
- 8178 replies
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7 May 2015
Hi
Have at look at the TopologyBuilder and/or the NetworkTopologyCalculator (check for _network_id), in particular using the Group By clause on your attribute.
David
+3
using a spatiarelator with intersect criteria and a _list seems sufficient.
Test for attribute = Y.
On the Passed port check the list if it there is any Y in it, for instance with a ListSearcher. Notfound port will yield your result.
Userlevel 2
+17
- Contributor
- 7539 replies
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8 May 2015
Hi Robbie,
I think it's enough that you think of Y edges only. For example:
Send all the Y edges to a NetworkTopoloyCalculator and connect a Mathcer with this parameter setting.
- Match Geometry: NONE
- Attribute Matching Strategy: Match Selected Attributes
- Selected Attributes: _network_id
The "isolated" edges will be output from the NotMatched port.
Takashi
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