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

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

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

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

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

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

+ 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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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