Generate a Point at ends of Aggregated Polyline

Have you tried using a CoordinateExtractor with index -1 (end) followed by a VertexCreator to create the point?

Ive never used Coordinate Extractor. Will the -1 variable capture the multiple ends of the aggregated line? Dataset is gas main so I need only the points at the ends.

I can give this a try.

The CoordinateExtractor set at -1 will only give you the very last vertex of the aggregate geometry. If you need one point for each segment, insert a Deaggregator just before the CoordinateExtractor.

Let me build it out now and give it a try. I will follow up in just a few minutes. Thanks!

David it only created a single point but the polyline has a lot of end areas.

I need to generate a point at every endpoint so I can then buffer and capture streets within those buffers.

If I deaggregate wouldnt it make a point at the end of every segment which would be to many points.

This sure is a puzzle.

as I thought I used deaggregator and it made to many points. I just need the ends after its all be aggregated.

Here is sample of the data.

This polyline is Aggregated and I need to generate a point at each of those end points.

I posted a photo to try and clarify. Can you see it? When I deaggregate it generates way to many points. Perhaps Im using wrong terminology when I say "end".

I have to provide a list of names that appear within a buffer from the "ends" of mains. My plan was to generate a point and buffer than spatial join for results.

Hope the photo provides more clarity.

Could you perhaps also upload an illustration where you've given a few examples of where the points should be in relation to the lines?

yes I have quick meeting then will upload that for you. Thanks

I would probably use a topology builder here and then test for nodes that only have 1 element in their list

I just used Paint to mark points where "ends" of gas main is. It would be where the mains end generate a point at those ends. In other words where the main stops in real world a point there. I did not mark every end I hope this makes sense.

im not familiar with this. I will look into this. Do you have sample flow as listed below?

Thanks so much

TopologyBuilder with the following parameters

Aggregate Handling: Deaggregate

List Accumulation/Generate List From Input Edges: _edges (or anything really)

Advanced Parameters Generate From: End Nodes Only

you are amazing. Let me try now. Will update soon as I build it up

Hi JDH,

I am having trouble with following:

I place in List Builder but not sure what to pick. Choices are: _edge_id, _faces, _from_node, L or R edge or face

Do I pick any of them?

Advanced parameters (End Nodes Only_. Is that in a different transformer? That option is not available in TopologyBuilder

Thanks

What version of FME are you using, there's been significant GUI changes to the transformer recently.

In 2018 this is how I create points where a line doesn't meet any other line

it wont write it, it ponly outputs a single point unless I explode the list but then it loses all coordinate attrbutes etc and wont let me readd. I havent been stumped like this in while :(

Hi @sav426,

the -1 index is the last coordinate in the feature. There's a bit more information on the CoordinateExtractor here that explains the parameters in the transformer.