I am running a line on line overlayer and only want to compare 1 feature dataset to another (i.e. i dont want features from the same input dataset to self intersect).
Thanks in advance. I am running FME2011.
Question
Line on Line Overlay - Comparing one feature set to another
I think this is a simple one, but for the life of me i cant seem to figure it out.
1 person upvoted this
Hi,
I guess you have two line feature groups (datasets) and you are trying to split lines at intersections between a group and another group (except intersections of lines belonging to the same group).
If my understanding is correct, this article could be helpful for you: Find intersecting lines that have different attribute values http://fmepedia.safe.com/AnswersQuestionDetail?id=906a0000000cnYWAAY After finding the intersections, you can split lines at them using a PointOnLineOverlayer.
Hope this helps.
Takashi
Thanks for all the repsonses. I tried a few things still with no success based on your suggestions. I guess i should have explained my issue in a little more detail.
I have 2 input line feature datasets (dataset1 and dataset2).
I would like to create a point feature dataset in all instances where the features from dataset1 intersect the features from dataset2 (but not within each dataset).
Intersector (and some suggestion above) would work perfectly except the lines in dataset1 have in certain instances millions and millions of self intersections (dont ask) and cause the intersector to run for hours, and in some instances, days!
As the one post says, i really need a "do not group by" option in the intersector.
Thanks in advance.
+17- Supporter
Has anyone come up with a solution to this problem?
I would also like to get the intersection points between Feature Class A and Feature Class B.
I do not want to get intersection points between various lines within Feature Class A.
I do not want to use Line Combiner to join all of Feature Class A into one line because sometimes I have two lines in Feature Class A meeting along a line in Feature Class B at the same point so I want both of those intersection points.
This has been frustrating as I can do this in one step in ArcGIS Pro but have not been able to figure out how to replicate in FME.
+31- Influencer
sammy wrote:
Has anyone come up with a solution to this problem?
I would also like to get the intersection points between Feature Class A and Feature Class B.
I do not want to get intersection points between various lines within Feature Class A.
I do not want to use Line Combiner to join all of Feature Class A into one line because sometimes I have two lines in Feature Class A meeting along a line in Feature Class B at the same point so I want both of those intersection points.
This has been frustrating as I can do this in one step in ArcGIS Pro but have not been able to figure out how to replicate in FME.
TopologyBuilder may be your best bet. There are ways within that transformer to create lists based on what contributed to the topology, including which feature class it original was apart of (fme_feature_type). After that you can filter out the nodes that were built from both feature classes.
1 person upvoted this
+17- Supporter
What I am doing for now is:
- LineOnLineOverlayer (defaut settings) - to get all the intersection points
- LineOnLineOverlayer, Group By: fme_feature_type - to get only the intersections within each feature class
- Matcher - reading in the output points from the previous two LineOnLineOverlayers. The results from the NotMatched port seem to be giving me the points that I want (no intersections from within the same feature class)
Please upvote this idea for adding the “exclude intersections with same feature class” to the LineOnLineOverlayer transformer:
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