Free tool
Duplicate point finder
Paste a point list or load a CSV. Find point IDs used more than once, and points that sit on top of each other.
Separate values with commas, spaces, tabs or semicolons. A header line is skipped automatically. Points with the same ID are flagged even if they are somewhere else.
Method and limits
- Duplicate IDs: IDs are compared exactly, case-sensitive, after trimming spaces. Blank IDs are ignored.
- Coincident points: two points are flagged when their horizontal distance is no more than the tolerance. You can also require that heights agree within the tolerance. Points are not assumed to be in any coordinate system: use one consistent set of units.
- The coincident search was checked against a brute-force comparison of every pair on a random 400-point set and matched exactly.
- Your file is read in the browser and never uploaded.
- This tool is a convenience, not a survey deliverable. Check results against your own work, and use certified methods for anything you sign off. Provided as is, in line with the terms. Nothing you enter is sent anywhere.