Imagery Data Use in GIS
November 8, 2001
Percy - PSU Geology
Geodata Manager/Research Faculty
Summary
Air Photo (remote sensing) data is used for:
Basemaps to overlay field data (GPS, etc)
Delineation of vector features (wetlands, etc)
Supervised or unsupervised classification (reclass using "bins")
Change detection (temporal analysis)
Other???
Different Types of Image data
Example
Data Formats
Image enhancement
Mosaic'ing and Registration (Georeferencing)
Feature Extraction
Vegetation Index (NDVI)
MultiSpectral Categorization
Change Detection
2 subsequent shots during dry vs wet seasons.
Differencing algorithm
