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Imagery: Segmentation and
ClassificationJeff Allenby – Chesapeake Conservancy
Mark Romero – Esri
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Agenda
• Overview of Image Classification
• ArcGIS Pro Image Classification
• ArcMap Classification
• Tips and Resources
• Chesapeake Conservancy Impervious Surface Extraction
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Image Classification
• Supervised or Unsupervised
• Object or Pixel Based
• Assigning Classes in a LULC System
• Outputs are used to create thematic maps
• Supporting Layer in a GIS
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Remote Sensing Image ClassificationThree Main Techniques
Supervised
Object
Unsupervised
Supervised
Object
Unsupervised
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Pixel or Object Based
Unsupervised
Choose Image
ISO Clusters
Assign Classes
Clean Up
Merge Classes
GOAL
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Pixel Based
Supervised
Choose Image
Training Samples
Maximum Likelihood
Accuracy
Classify
GOAL
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Supervised
Choose Image
Segmentation
Training Samples
Accuracy
Support Vector
Machine
GOAL
Classify
Object Classification
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Object-Oriented Classification
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Software Requirements
• ArcMap 10.3.1 to 10.5
• ArcGIS Pro 1.2 to 1.4
- Wizard starts at 1.3
• Spatial Analyst Extension
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DemoClassification in ArcGIS Pro
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ResourcesDemos and Exercises
• Help System
• Spatial Analyst Toolset
• Blog Post Exercise
• Learn ArcGIS
• GeoNet Imagery & Remote Sensing
• Esri Training
- Image Analysis with ArcGIS
- Classify Imagery using ArcGIS
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