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If I have a network of roads. Each road consist of segments. I need to delete all segments that are starting segments of each road and also delete all side roads (dangling) which are represented with only one segment. I do not have idea how to realize this. Any tips? To delete such lines actually means not to proceed them further.

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What software are you using? – Micha Jun 5 '12 at 9:30
FME 2011, 2012 ! – Z77 Jun 5 '12 at 9:33
I will try with the MRF2DCleaner transformer and see what I get. – Z77 Jun 5 '12 at 11:56
MRF2DDangleRemover Not available with current license, what kind of licence do I have to have? – Z77 Jun 5 '12 at 12:27
MRF transformers are an extra cost item. Contact for pricing info – Mark Ireland Jun 5 '12 at 17:28
up vote 1 down vote accepted

You can find lines that are only a single segment by using the CoordinateCounter. Throw away anything that has a count of 2. Doesn't always mean they are a dangle though.

The surer - but longer - method would be to use the TopologyBuilder and check to see where a segment has a node ID that is not referenced by any other segment. Then it must be a dangle.

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But how to detect in FME if there are duplicate from_node or that there is from_node =! to_node. I tried with Tester but it is not working as I thought. – Z77 Jun 6 '12 at 10:33
Nope. This is really hard to solve... – Z77 Jun 7 '12 at 10:57
Actually It would be good If I could test if _from_node of first segment is _end_node (_to_node) of second (following) segment.. If it is so, so this is not dangling line, but else it is. Am I right???? I tried to test this also with ListHistogram that is counting how many same values of an attribute exists, but with this tranformer I can check only one attribute, not two what will be solution. – Z77 Jun 7 '12 at 11:29

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