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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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This rule is used when an area cannot belong to two separate feature classes. The Subtract fix removes the overlapping portion of each geldatabase that is causing the error so the boundary of each feature from both feature classes is the same.

Must Arcgix Single Part. Consider using tools in the Modify Features pane. This rule is useful where line features, such as highways, may not have multiple parts.

A predefined fix is not available for this error. Must Cover Each Other. 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.

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This is useful for modeling cases where a fitting must connect two pipes or a street intersection must be ruules at the junction of two streets.

The Delete fix removes polygon features that would collapse during the validate process based on the topology’s cluster tolerance. For example, parcels might be stored in the geodatabase along with their boundaries.

The Delete fix removes point features that are not properly within polygon features. This rule is used when two systems of classification are used for the same geographic area, and any given point defined in one system must also be defined in the other.

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Geodatabase topology rules and topology error fixes

Points cannot overlap within the same feature class or subtype. Multipart lines are created from a single sketch.

In the Contents pane, geodatabase topology rules appear as group layers containing sublayers that symbolize modified areas, and errors organized by geometry type. You must select the feature from which the error will be removed. 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.

All polygons must form a continuous surface. In instances where this rule is violated, the original geometry is left unchanged.

Geodatabase topology rules and topology error fixes—Help | ArcGIS for Desktop

Must Not Intersect With. You can detect multipart features using the Must Be Single Part rule.

This fix ropology be applied to one or more selected Must Not Overlap With errors. The Delete fix removes line features that are not within polygon features. Each parcel might be defined by one or more line features that store information about their length or the date surveyed, and every parcel should exactly match its boundaries. This rule is used when there are lines from two layers that should never cross each other or in cases where the intersection of lines should only occur at endpoints, such as streets and railroads.

Requires that a polygon in one feature class contain at least one point from another feature class. This rule is useful for lines, such as contour lines, that cannot cross themselves. Requires that a tules feature must touch lines from the same feature class or subtype at both endpoints. Requires that the polygons of one feature class or subtype must share all of their area with the polygons of another feature class or subtype.

You must pick the line feature into which to merge. Each point must be properly inside exactly one polygon and each polygon must properly contain exactly one point.

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This rule requires that there are no voids within a single polygon or between adjacent polygons. Delete Feature removes point features that are not coincident with the endpoint of line features. Must Be Properly Inside.

Requires that a polygon in one feature class or subtype must share all of its area with polygons in another feature class or subtype. The Subtract fix removes the overlapping portion of geometry from each feature that is causing the error and leaves a gap topolpgy void in its place.

Once you have discovered the topology errors, you can select the error on the map with the Fix Topology Error toolor select the error from within the Toology Inspector.

Geodatabase topology rules and fixes for point features—ArcGIS Pro | ArcGIS Desktop

The Subtract fix removes the overlapping line segments from the feature causing the error. This fix can be applied to one or more selected Must Not Overlap errors. Some topology rules govern the relationships of features within a given feature classwhile others govern the relationships between features in two different feature classes or subtypes.

If no point feature is found within the tolerance specified, the point is not snapped. The Snap fix will snap to the nearest feature found within the distance. Use this rule when you want to model points tpoology are coincident with lines, for example, when monitoring stations must fall along streams.

The Merge fix adds the portion of overlap from one feature and subtracts it from the others that are violating the rule.