Contents
When digitizing errors can be prevented using?
Using snapping in GIS can prevent errors from happening altogether. The snapping environment determines the distance that newly digitized points, lines, and polygons will occupy the same location as existing features. When new features are created in the editor, they will be automatically snapped to existing features.
What are the main sources of error in GIS?
GIS Errors, Accuracy, and Precision. Errors can be injected at many points in a GIS analysis, and one of the largest sources of error is the data collected. Each time a new dataset is used in a GIS analysis, new error possibilities are also introduced.
How are polygon errors created in geodatabase topology?
Polygon errors are created from the uncovered areas of the polygons in the first feature class or subtype. Remove Overlap removes the overlapping geometry from the feature causing the error. You can choose the feature to preserve or apply the fix to all errors.
Where is the export topology errors tool in ArcGIS?
The Export Topology Errors tool is located in the Topology toolset in the Data Management toolbox. The tool requires an input topology, an output location for the new feature classes, and a base name that will prefix the name of the new feature classes.
What happens when I export a topology class?
The exported feature classes are one-time snapshots of the topology at the instant the tool runs and are not connected back to the topology or origin features. For example, if I update a value in the exported errors’ attribute table to indicate that an error is a valid exception, the error will still be an error in the actual topology.
How to remove overlap from a polygon feature?
Remove Overlap removes the overlapping geometry from the feature causing the error. You can choose the feature to preserve or apply the fix to all errors. Create Feature creates a new polygon feature from the error shape and removes the portion of overlap from each of the features.