Acquiring information about a natural feature or phenomenon, such as the Earth's surface, without actually being in contact with it. USGS remote sensing is usually carried out with airborne or spaceborne sensors or cameras.
Detailed measurements of elevation help to understand the extent and severity of subsidence. Study asks if subsidence indicates the aquifer system is compacting temporarily or permanently, and are the changes human-induced or tectonic.
Description of what Digital Orthophoto Quadrangles are and how to obtain them plus information on the DOQ program, points of contact, DOQ status graphic, examples of DOQs, and free data viewer software.
Modified version of paper by F.T. Manheim and A.G. McIntire, Civil Engineering Practice, Vol. 13, No. 1, pp. 35-48 (1998). A new shoreline file has been created for Boston Harbor by digitizing and combining the most recent charts.
The Vegetation Drought Response Index is a drought monitoring and mapping tool integrating satellite observations of vegetation and climate with land cover, soil characteristics, and other environmental factors.
Access to products archived at the EROS Data Center, Sioux Falls, SD, including aerial photography, remote sensing data, satellite imagery, maps, and elevation data with product search retrieval and ordering information.
Query and order satellite images, aerial photographs, and cartographic products through the U.S. Geological Survey. Log in as a guest or as a registered user with more privileges. Uses Java Script or Applet Versions for PC, MacIntosh, and Unix programs.