Hi Community,I'm working with FME 2023 and I need to snap these purple points to the closest locations along the yellow polyline. What's the best way to do this?How do I use the Snapper transformer properly in this case?Could you please share an example workspace?I've attached the relevant data—thanks in advance for your help!

Hi @gbcfgeo2025,If the requirement was to snap the points to theclosest vertex of aline, AnchoredSnapper (Snapping Type: Vertex Snapping) would work as expected. However, I think a combination of NeighborFinder and VertexCreator would be better, if you need to snap the points to theclosest location on a line regardless of it matchesa vertex or not.NeighborFinder : Send the point features to the Base port, send the line features to the Candidate port.VertexCreator (Mode: Replace with Point) : Move the points to theclosest location on a line.Just be aware, the coordinates of a moved point could not match the coordinates of a point on the line with mathmatical precision, since there must be an unavoidable calculation error with computer calculation.

Question

How to Snap Points to the Nearest Location on a Polyline in FME 2023?

Forum|Forum|5 months ago
June 16, 2025
2 replies
68 views

+3

gbcfgeo2025
Contributor

Hi Community,
I'm working with FME 2023 and I need to snap these purple points to the closest locations along the yellow polyline. What's the best way to do this?
How do I use the Snapper transformer properly in this case?
Could you please share an example workspace?
I've attached the relevant data—thanks in advance for your help!

+28

alexbiz
Influencer
Forum|Forum|5 months ago
June 16, 2025

You might want to use the AnchoredSnapper transformer instead.

Draw it, map it, shape it, fix it, share it, change it, send, translate it 🎵

Upvote

takashi
Forum|Forum|5 months ago
June 17, 2025

Hi @gbcfgeo2025 ,

If the requirement was to snap the points to the closest vertex of a line, AnchoredSnapper (Snapping Type: Vertex Snapping) would work as expected. However, I think a combination of NeighborFinder and VertexCreator would be better, if you need to snap the points to the closest location on a line regardless of it matches a vertex or not.

NeighborFinder : Send the point features to the Base port, send the line features to the Candidate port.
VertexCreator (Mode: Replace with Point) : Move the points to the closest location on a line.

Just be aware, the coordinates of a moved point could not match the coordinates of a point on the line with mathmatical precision, since there must be an unavoidable calculation error with computer calculation.

Why not inspect features with Visual/Data Preview and Feature/Record Information before writing them into a destination dataset?

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How to Snap Points to the Nearest Location on a Polyline in FME 2023?

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