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'Generate Near Table' and 'XY To Line' Not Working As Expected

FidelTedla

I have two point layers (layer-1 and layer-2).

- I used 'Generate Near Table' to identify connections between points in layer-1 and layer-2. I used a search radius of 5000m and maximum number of closest of 10.

- I then used the 'XY To Line' tool to create connection lines between the connections identified in the first step.

Issue: some points in layer-1 are connecting to less than 10 points in layer-2 although there are more layer-2 points within the 5000m radius.

In the attached image the three green lines are generated by ArcGIS and orange broken-lines are not generated but are within the 5000m radius.

What could be the reason and how do I correct this?

Software: ArcGIS Pro 2.6.0

Thanks

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Accepted answers

FidelTedla

Solved. Issue was that there were duplicate points in my input data (point layer). Once the duplicates are removed the tools work as expected.

SabraFRC_2-1650228529672.png

All comments

DavidPike

Are you using Planar or Geodesic method in the near tool? What coordinate system is the data and dataframe in, and are you perhaps measuring incorrectly in planar instead of geodesic?

FidelTedla

I am using Planar method in the near tool. The coordinate system of the dataframe and the point layers is 'ETRS 1989 LAEA'.

DavidPike

Are any points going outside the projection bounds? That's also an area preserving projection, so distance won't be uniform. I would run the Near Table using Geodetic, and beware of planar measurements with that projection.

FidelTedla

All points are within the projection bounds. I run the Generate Near Table tool using Geodetic and didn't make much difference as the distances I am looking at are ot that long.

Not sure where the issue is coming from.

FidelTedla

Solved. Issue was that there were duplicate points in my input data (point layer). Once the duplicates are removed the tools work as expected.

SabraFRC_2-1650228529672.png

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