topic Re: Duplicate geometry in ArcGIS Data Reviewer Questions

Duplicate geometry

TimothieBiggs — Tue, 21 Dec 2010 16:58:57 GMT

Does anyone know how close two point features have to be to be considered duplicate by the duplicate geometry check?

Tim

Re: Duplicate geometry

DanHopkins — Tue, 21 Dec 2010 19:10:58 GMT

The Duplicate Geometry Check will consider your two point features to be duplicate geometry when they are colocated, or are at the same location (i.e. have the same X,Y). If they have different X, Y, the Duplicate Geometry Check will not detect your two point features.

If you want to find point features that are near each other, have you considered running a the Geometry on Geometry Check with Spatial Relation Check set to Intersects within a specified Tolerance?

Re: Duplicate geometry

MichelleJohnson — Tue, 21 Dec 2010 19:17:19 GMT

Within the XY Tolerance that is defined in your geodatabase.

If you want to look for duplicate points that are a little farther than the xy tolerance, then you can use the Geometry on Geometry check using the Intersects spatial relationship and entering a user defined tolerance that is greater than the XY tolerance.

Re: Duplicate geometry

MichelleJohnson — Tue, 21 Dec 2010 19:18:26 GMT

Dan beat me to the response by minutes. Thanks Dan.

Re: Duplicate geometry

TimothieBiggs — Wed, 22 Dec 2010 12:33:36 GMT

OK so the xy tolerance (0.003280833333333 feet) is the distance outside of which the point won't be considered duplicate - so they have to be dead on to be considered duplicate.

Using the Geometry on Geometry/ Intersect with a specified tolerance to find nearby points is a useful tip.

Thanks!
Tim