How to construct lines from one dataset of points and one dataset of pairs

Hi @nicholas

After the use the transformer LineBuilder.

Danilo

A possibly way I can think of is:

1. Merge the first point geometry to the features containing pair of IDs, with a FeatureMerger (Join On: ID of the first point, Feature Merge Type: Geometry).
2. Extract coordinates (x, y) from the original point geometries with the CoordinateExtractor (Mode: Specify Coordinate, Coordinate Index: 0), and merge the (x, y) to the features output from the Merged port of the first FeatureMerger, with another FeatureMerger (Join On: ID of the second point, Feature Merge Type: Attributes Only).
3. Use the VertexCreator (Mode: Add Point) to add the second point to the features output from the Merged port of the second FeatureMerger.

I have done exactly that.

It works, but it seems not elegant.

I was hoping that there was a way to merge the geometries directly without converting the points from geometry to coordinate values and back to geometry again.

@nicholas I think I would go with @takashi 's approach - it would be much clearer for others to understand the workflow - even if it does require extracting the coordinates. However, there is an obscure part of the FeatureMerger functionality that can build geometries: Geometry Merge Type: Build Lines From Points. I've never used this before so thought this might be an excuse to try that. Here is the result: