Imagery

Question 1

Types of Commercial Satellite Imagery

Answer 1

Panchromatic (PAN) - best spatial resolution, 1 band
Multispectral (MSI) - less resolution, 2 or more bands
Synthetic Aperture Radar (SAR) - weather resistant

Question 2

DTED

Answer 2

Digital Terrain Elevation Data (DTED), adding elevation data adds precision