Topology in ArcGIS
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The document provides steps to correct topology errors in a geospatial dataset. The steps include: 1) importing a feature class into a new geodatabase and feature dataset; 2) building a topology on the dataset; 3) using the topology toolbar to search for and inspect errors, such as gaps or overlaps between features; and 4) correcting the errors by merging or creating new features. Once all errors are addressed, the edits are saved and the corrected dataset remains in the geodatabase.
Topology in ArcGIS
- 1. TOPOLOGY
- 2. STEP-1 Add the file to be corrected Tip: Save your ArcMAP *.mxd file before starting (to avoid losing data due to some error)
- 5. Step-2: Create a personal/file geodatabase
- 6. Step-3: Right click geodatabase New New Feature Dataset
- 7. Give a name to new feature dataset
- 8. Select the projection of the dataset (same as data to be corrected)
- 9. Click Next Finish (No changes here)
- 10. Step-4: Right Click New Feature Dataset Import Feature Class (Single)
- 11. Select the layer in Input Give a Output Feature Class Name OK
- 12. Step-5: Right Click New Feature Dataset Topology
- 15. Step-6: Move Topology layer to ArcMap from Catalog Note: Remove existing layers
- 17. Step-7: Display Topology Toolbar
- 18. Step-8: Start Editing to highlight the toolbar
- 19. Step-9: Click on Error Inspector on Topology toolbar
- 20. Step-10: Click Search Now in Screen Below to begin error search
- 21. RIGHT CLICK ERROR TO SHOW OPTIONS. USUALLY BOUNDARY CAN BE MARKED AS EXCEPTION. ZOOM TO LAYER TO SEE ERROR PROPERLY
- 22. Zoom to the next error which is a gap in dataset
- 23. Create New Feature in Gap
- 24. Merge it with nearby polygons (check land use type in imagery or Give new Attributes)
- 25. For Must not Overlap Error – Use Merge. Select any adjacent Polygons to Merge the Error
- 26. Save Edits Stop Editing (after all errors are corrected) The file inside geodatabase is the final