1. TAN HOANG – GEOG 342 USING FEATURE ANALYST TO EXTRACT BUILDING FEATURES USING NAIP IMAGERY – DOS PALOS, MERCED COUNTY

2. BUILDING FEATURE EXTRACTION Dos Palos, Merced County Urban development can be measured in many ways. Urban land cover – Not all land cover the same Building features – Useful to analyze direct long-term impact and growth Tool: Feature Analyst 5.0 Supervised Learning National Agriculture Imagery Program (NAIP) aerials 2005 2010

3. STEPS Create polygons to serve as training features for Feature Analyst. Supervised Learning Manmade Features (>5 m) Input Representation Bull’s Eye 2 Manhattan Masks Roads City Limits

4. CLUTTER REMOVAL/ADDING MISSED FEATURES & REPEAT

5. ISSUES Roads and sidewalks similar to some rooftops Used mask to exclude roads Dirt lots/unfinished subdivisions/parks Repeated revisions

6. FRUSTRATION

7. LIMITS TO REPEATED REVISIONS

8. RESULTS – AFTER SQUARE UP TOOL

9. POTENTIAL USE AS BUILDING POINTS NAIP not high-res enough Extracted features never quite match up to aerials Could use as building point feature extractions