remote sensing
GIS
Acquiring information about an object without contacting it physically. Methods include aerial photography, radar, and satellite imaging.
- — GIS Glossary retrieved 2014-05-27
Any of the technical disciplines for observing and measuring the Earth from a distance, including satellite imaging, Global Positioning Systems, RADAR, SONAR, aerial photography, etc.
- — Geographic Information Services (GIS) Glossary retrieved 2014-05-27
Water
Method for determining characteristics of an object, organism or community from afar.