School of Geography FACULTY OF ENVIRONMENT Introduction to Editing

ArcGIS Editor Toolbar All editing functions are controlled through the toolbar Edit Menu Edit Tool Sketch Tool Task List Target Layer Split ToolRotate Tool Attribute Dialog Sketch Properties

Common Editing Tasks Create New Data Create new geometry (coordinates that represent points, lines polygons) Update new attributes Edit Existing Data Edit and update geometry Edit and update attributes

Create and Edit Features Choose Data Frame Start Editing Set the Target Layer

Set Options Snapping tolerance sets distance at which snapping will occur Sticky tolerance determines how far an object has to move before it does

Create New Features Task should be set to Create New Feature Most common tool: Sketch tool Click with your left mouse button and you create a vertex Double click and you end the feature Vertex Sketch Tool

Working with Sketches Right clicking and moving away from a vertex Right clicking on last drawn vertex

Edit Attributes Add values or copy/cut paste them for a single or multiple selected features Attribute Values

Edit the Values of a Vertex Edit Sketch Properties dialog Highlight a vertex Can edit values directly

End the Editing Session Stop editing without saving changes OR Stop editing and save the changes made OR Save edits and continue making changes

Editing Lines – How to Start? How do I start constructing a line? Start with a vertex Absolute X,Y Snap to existing vertex or end Creating vertices based on other features Parallel, perpendicular, etc. Distance, direction, segment deflection, etc.

Editing Lines can extend or trim a line based on another feature Line is extended Line is trimmed

Creating Curves Use Arc, End Point Arc or Tangent tool Which one should you use? Need to experiment! Arc Tangent Arc End Point

Creating Polygons Start with a vertex Digitise a set of vertices Double click on the starting vertex to end the polygon Digitise on a backdrop map Can create other vertices based on measurements (e.g. deflection and length) – then use Square and Finish function

Editing Existing Polygons Modify/Reshape/Cut Polygon Split an existing polygon into two Or change just a single vertex

Editing Points, Lines and Polygons Hands-on Exercise #9