Imagery Data Use in GIS
Percy - PSU Geology
Geospatial Data 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)
False color "band math"
Other???
Different Types of Image data
Example
Spectra
Data Formats
Image enhancement (filters, etc)
Mosaic'ing and Registration (Georeferencing)
Feature Extraction
Vegetation Index NDVI
= (NIR - Red/NIR + Red)
MultiSpectral Categorization
(Supervised vs Unsupervised Classification)
Change Detection
2 subsequent shots during dry vs wet seasons.
Differencing algorithm
