Unable to validate duplicate vertices using Check Geometry in ArcGIS Pro

Description

In ArcGIS Pro, validating a GeoPackage feature with duplicate vertices sharing identical x-, y-, and z-coordinates using the Check Geometry tool does not return duplicate vertex issues. Instead, the following warning message is returned in the Check Geometry pane and output table:

Warning:  
003410: Shape has a structural error! (-153) Polygon shell contains a vertical line at fid: <FID> in <feature class>

In the Check Geometry pane

In the Check Geometry output table

Cause

The Check Geometry tool in ArcGIS Pro evaluates many geometry conditions using planar x- and y-coordinate topology rules. Duplicate vertices with identical x-, y-, and z-coordinates create zero-length segments, which are interpreted as structural errors instead of duplicate vertex issues. As a result, both zero-length segments and true vertical segments (same x- and y-coordinates with different z-values) trigger the warning 003410.

Solution or Workaround

1. Use the Find identical tool to identify identical records in the polygon feature class. In this example, OBJECTID 1 and 2 containing duplicate values in the polygon feature are identified.

2. Create vertices for identical features, and add x-, y-, and z-coordinates to the attribute table to identify duplicate vertices.
1. On the Map tab, click Select to select a polygon feature with identical vertices. In this example, OBJECTID 1 is selected.
2. Use the Feature Vertices To Points tool to create points from the vertices of the input polygon feature.
3. In the Contents pane, right-click the newly created output point feature and click Attribute Table.
4. In the attribute table, create new fields for x-, y-, and z-coordinates. Refer to Steps 1 through 4 in ArcGIS Pro: Create a field and apply a domain and default value for instructions.
5. On the Fields tab, in the Manage Edits group, click Save.
6. Populate the x-, y-, and z-point coordinates into the attribute table. Refer to ArcGIS Pro: Calculate Geometry Attributes (Data Management) for more information.
7. In the attribute table, identify rows with identical x- and y-coordinates. In this example, OBJECTID 1 with two duplicate vertices are identified.

3. Modify the polygon feature to remove duplicate vertices.
1. On the Map tab, click Select to select the polygon feature with duplicate vertices.
2. Select the Edit Vertices tool to modify the polygon feature.
3. In the Edit Vertices pane, select the duplicate vertex with identical x- and y-coordinates listed in the Longitude (dd) and Latitude (dd) columns, and click Delete selected vertex .
4. Click Finish .
5. On the Edit tab, in the Manage Edits group, click Save.

4. Select another identical polygon feature and repeat Steps 2 through 3 to find and remove duplicate vertices.
5. Run the Check Geometry tool to ensure the modified polygon features contain no geometry problems.

The Check Geometry tool validates the modified polygon features with no warnings, as shown below.