There are many topology rules you can implement in your geodatabase, depending on the spatial relationships that are most important for your. Errors in GIS data mean any information or decisions based on that data are flawed. Geodatabase topology provides an automated, rule-based solution to. Topology in ESRI® ArcGIS® allows you to model spatial relationships between feature model. Topology errors are violations of the rules that you can easily.

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The Create Feature fix creates a new line feature from the boundary segments of the polygon geoodatabase generating the error. The Subtract fix removes the overlapping line segments from the feature causing the error.

Attributes from the original features will be maintained in the split features.

Point geodatabbase are created on the points that are not covered by lines. The square on the right indicates an error because it is a point that is not on the boundary of the polygon.

The Subtract fix removes the overlapping portion of each feature that is causing the error and leaves a gap or void in its place. If the line feature does not share any segments in common with the boundary of geldatabase polygon feature, the feature will be deleted. This rule is useful for features, such as streets, where segments might touch in a loop but where the same street should not follow the same course twice. Feedback on this topic? For steps to validate a geodatabase topology and fix errors, see Validate and fix geodatabase topology.

To keep a feature, you can enable your snapping preferences and use Move in the Modify Features pane. If the distance value is 0, lines will extend until they find a feature to snap to.

ArcGIS Desktop Help – Topology rules

The Snap fix can be applied to one or more Must Coincide With errors. A well-designed geodatabase will have only those topology rules that define key spatial relationships needed by an organization. Where a red point and a blue point overlap is an error. Topology rules can ruls defined between subtypes of features in one or another feature class. Boundary corner markers might eules constrained to be covered by the endpoints of boundary lines.


Polygons may share edges or vertices.

It is useful for modeling administrative boundaries, such as ZIP Codes or voting districts, and mutually exclusive area classifications, such as land cover or landform type. Remember that you can mark this error as an geodagabase. This fix can be applied to one or more Must Be Single Part errors. Use this rule when you want to model points that are coincident with lines, for example, when monitoring stations must fall along streams.

This fix can be applied to one or more Must Be Properly Inside errors. Must Cover Each Other. This rule is useful for points that fall along a set of lines, such as highway signs along highways. Snap moves a point feature in the first feature class or subtype to the nearest point in the second feature class or subtype that is located within a given distance.

Requires that the interior of polygons not overlap. You must pick teodatabase line feature into which to merge. To view this document, you need a copy of Adobe Reader. All polygons must form a continuous surface.

Requires that lines have only one part. This rule is useful where lines must only be connected at endpoints, such as in the case of lot lines, which must split only connect to the endpoints of back lot lines and cannot overlap each other. Must Not Have Gaps. The Subtract fix removes the overlapping portion of each feature that is causing the error so the boundary of each feature from both feature classes is the same. Requires that boundaries of polygon features in one feature class or subtype be covered by boundaries of polygon features in another feature class or subtype.


Geodatabase topology rules and topology error fixes

Available with Standard or Advanced license. This fix can be applied to one or more Must Be Inside errors. The individual line feature overlaps itself, with the error indicated by the coral line.

You can use Create Feature to create a new polygon in the void in the center. If you have duplicate line features, choose the line feature you want to delete from the Subtract dialog box.

Ryles Subtract fix removes line segments that are not coincident with the boundary of polygon features. You can either ignore this error or arcfis it as an exception. Any points that overlap are errors. In the Contents pane, geodatabase topology rules appear as group layers containing sublayers that symbolize modified areas, and errors organized by geometry type.

Delete Feature removes point features that are not coincident with the endpoint of line features. Consider using tools in the Modify Features pane. This rule is useful for lines, such as contour lines, that cannot cross themselves. The Trim fix will trim dangling line features if a point of intersection is found within a given distance.

This could be used, for example, to require street features to be connected to other street features at both ends, except in the case of streets belonging to the cul-de-sac or dead-end subtypes. This fix can be applied arcgid one or more selected Must Not Have Gaps errors.