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
+21
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
+26
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 
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