1. Mastering ArcGIS Basic Editing in ArcMap
Chapter 11
Chapter 11
Basic Editing in ArcMap
Copyright © 2006 by Maribeth H. Price

2. Outline Understanding the basic editing process
Mastering ArcGIS
Chapter 11
Outline
Understanding the basic editing process
Using snapping to ensure topological integrity of features
Adding features to map layers
Using the sketch tools and context menus for detailed and precise location of features
Entering and editing attribute data
Copyright © 2006 by Maribeth H. Price

3. What can you edit? ArcView ArcEditor and ArcInfo
Mastering ArcGIS
Chapter 11
What can you edit?
ArcView
Shapefiles and geodatabase feature classes
ArcEditor and ArcInfo
Geodatabase networks
Geodatabase topologic features
Coverages can only be edited in the ArcEdit program of ArcInfo. They cannot be edited in ArcMap.
Copyright © 2006 by Maribeth H. Price

4. The Editor toolbar Target layer Menu Split Rotate Sketching tools Edit
Sketch Properties
Task bar
Attribute Editor
Copyright © 2006 by Maribeth H. Price

5. Snapping Automatically connects features
Mastering ArcGIS
Chapter 11
Snapping
node
Automatically connects features
Moves the editing cursor exactly to the same point once it gets close.
A dangle—the two lines fail to connect
Correct topology—the horizontal line intersects the vertical one, creating three lines.
Copyright © 2006 by Maribeth H. Price

6. Mastering ArcGIS
Chapter 11
Snapping tolerance
Snapping tolerance b b + + c a a
When edit cursor falls inside tolerance it jumps to the precise location so next point falls in the same spot.
Copyright © 2006 by Maribeth H. Price

7. + Types of snapping ? End snapping Snapping tolerance Edge snapping
Mastering ArcGIS
Chapter 11
Types of snapping
End snapping
Snapping tolerance ? +
Edge snapping
Vertex snapping
Copyright © 2006 by Maribeth H. Price

8. Setting snapping Mastering ArcGIS Chapter 11
Copyright © 2006 by Maribeth H. Price

9. Mastering ArcGIS
Chapter 11
Editing features
Edit tool
Sketch tool
The Edit tool, sketch tool, and Task bar work together when editing
Copyright © 2006 by Maribeth H. Price

10. Target Layer Controls which layer new features will be placed in.
Mastering ArcGIS
Chapter 11
Target Layer
Controls which layer new features will be placed in.
Copyright © 2006 by Maribeth H. Price

11. Double-click to finish sketch
Mastering ArcGIS
Chapter 11
Creating a feature
Double-click to finish sketch
Copyright © 2006 by Maribeth H. Price

12. Right-click off sketch
Mastering ArcGIS
Chapter 11
Editing context menus
Right-click off sketch
Right-click on sketch
Vertex menu
Sketch menu
Copyright © 2006 by Maribeth H. Price

13. Sketch menu options Enter absolute point Constrain direction
Mastering ArcGIS
Chapter 11
Sketch menu options
Enter absolute point
Constrain direction
Enter change in xy
Constrain length
Copyright © 2006 by Maribeth H. Price

14. More options Deflect from sketch Parallel to feature
Mastering ArcGIS
Chapter 11
More options 90
Deflect from sketch
Parallel to feature 45
Direction and length
Deflect from feature
Copyright © 2006 by Maribeth H. Price

15. Adjacent polygons overlap gap Topological errors between two polygons
Mastering ArcGIS
Chapter 11
Adjacent polygons
gap
overlap
Topological errors between two polygons
Coincident boundary between two polygons
Copyright © 2006 by Maribeth H. Price

16. Creating adjacent polygons
Mastering ArcGIS
Chapter 11
Creating adjacent polygons
Draw first polygon with Create New Task
Add new polygon with AutoComplete
Two polygons with coincident boundary.
Copyright © 2006 by Maribeth H. Price

17. More tricks Multipart features Perpendicular edge snapping
Mastering ArcGIS
Chapter 11
More tricks
Multipart features
Perpendicular edge snapping
Copyright © 2006 by Maribeth H. Price

18. More sketch tools Distance Arc tool Midpoint Intersection Trace tool
Mastering ArcGIS
Chapter 11
More sketch tools
Distance
Arc tool
Midpoint
Intersection
Trace tool
Copyright © 2006 by Maribeth H. Price

19. Modifying a feature Click and drag vertices
Mastering ArcGIS
Chapter 11
Modifying a feature
Click and drag vertices
Sketch keeps track of new figure shape
Double-click when finished
Copyright © 2006 by Maribeth H. Price

20. Rotating features Drag around rotation point Select feature
Mastering ArcGIS
Chapter 11
Rotating features
Drag around rotation point
Select feature
Click and drag to move rotation point
Rotate tool
Copyright © 2006 by Maribeth H. Price

21. Splitting polygons Select polygon to split Sketch new boundary
Mastering ArcGIS
Chapter 11
Splitting polygons
Select polygon to split
Sketch new boundary
Double-click to finish sketch and create polygons
Copyright © 2006 by Maribeth H. Price

22. Attribute Editor Edit all selected Edit single feature
Mastering ArcGIS
Chapter 11
Attribute Editor
Edit all selected
Edit single feature
Selected features
Explore features
Copyright © 2006 by Maribeth H. Price

23. Saving work Save early, save often!!!
Mastering ArcGIS
Chapter 11
Saving work
Stops editing and asks to save any unsaved edits
Saves and continues editing
Save early, save often!!!
Copyright © 2006 by Maribeth H. Price

24. Coordinate systems ArcMap can edit across coordinate systems
Mastering ArcGIS
Chapter 11
Coordinate systems
ArcMap can edit across coordinate systems
Edited coordinates always saved to source file coordinate system regardless of data frame coordinate system
Projecting on-the-fly may degrade performance
Avoid it when possible
Copyright © 2006 by Maribeth H. Price

25. TIPS Always have a backup copy Shapefiles simplest and most robust
Mastering ArcGIS
Chapter 11
TIPS
Always have a backup copy
Shapefiles simplest and most robust
Keep number of open files down
Try to keep layers in same coordinate system
Save frequently!!!!!
Copyright © 2006 by Maribeth H. Price