- Global Positioning System (GPS)
a system of earth - orbiting satellites which can provide precise (100 meter to sub - cm.) location on the earth's surface (in lat/long coordinates or equiv.)
- Remote Sensing (RS)
use of satellites or aircraft to capture information about the earth's surface
Digital ortho images a key product (map accurate digital photos)
- Geographic Information System (GIS)
Software systems with capability for input, storage manipulation/analysis and output/display of geographic (spatial) information
GPS and RS are sources of input data for a GIS
A GIS provides for storing and manipulating GPS and RS data.