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Hi all,

 

 

perhaps this is a very simple question but I can't find the solution. I need to intersect two line feature classes, obtaining as a result only the intersecting line portions. This is the Overlay->Intersect tool in ArcGIS, but I can't find an equivalent transformer in FME. I tried the LineToLineOverlay  but it overlays all input lines, without distinguish between input and overlay features.

 

 

Thanks
On suggetion:

 

 

1. Add a Counter to give each line a unique ID.

 

2. Run them through a Intersector.

 

3. On the NODE output of the Intersector - use a listexploder to make one feature per item on the list

 

4. Merge the Listexploder-features with the real lines (before the Intersector) to get the Geometry of the lines. Everything that comes out of the FeatureMerger_COMPLETE port should now be the lines which intersects. You might want to remove duplicate points etc

 

 

 

Use an AttributeCreator after each input line and overlay line.  Create a common attribute name between the two, such as 'intersect'.  Give a default value of 1 to the overlays, and default value of 2 to the inputs.  Feed both into the Intersector.  From the intersected port, run a test filter on the 'intersect' attribute to split them up again. 
 To find identic common segments of two Line Features,  I use the "Chopper" with a Parameter-Value of "2"; this splits Lines into their segments.  After that I use the Spatial Relator with a created Attribute("DE9IM=1FFF0FFF2") as Parameter to find exact identical line segments, but one can use "Intersect" as well, to find other types of Intersections, too. See Attached Workbench and Result-Picture. http://www.krimpenfort.org/fme/CommonSegmentFinder_nk_FME2012.fmw 
 0684Q00000ArJSPQA3.png

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