Detecting Geometry Problems

SCAG Shapefile (Exer 2)

Splitting by Attribute

Splitting by Attribute: Menu

Splitting by Attribute: Dialog

Splitting by Attribute: Error

Processing Toolbox

• GUI for Processing
• Native and 3rd Party GIS Algorithms
• Organized by Provider

Processing Toolbox Menu

Processing Toolbox Search

Check Geometry Validity

Check Geometry Results

Check Geometry New Layers

Check Geometry Canvas

Invalid Ouptut Layer Table

Understanding Geometry Problems

Self-intersecting Ring

Self-intersecting Ring

• Problem with area calculations
• Other GIS operations

Polygon Area

Fixing Geometry Problems

Remove Other Layers

Search for Buffer

Buffer Dialog: Set Distance=0

Buffer Log

Check Validity of Buffered Layer

Check Validity of Buffered Layer

Check Validity of Invalid Output

Check Validity of Invalid Output

Split by Attribute Revisited

Back to original tract layer

Buffer the original tract layer

New Buffered Layer

Check Validity of Buffered

Check Validity of Buffered

Make Layer Permanent

Split Vector Layer

Split Vector Layer: Set Output Directory

Split Vector Layer Results

Split Vector Layer Results

Next Up

• Vector Analysis