Thursday, June 25, 2009

Isobars





Isobar maps show areas of equal air pressures.
This map shows air pressures throughout the United States. It also shows fronts as well as precipitation.
http://www.ametsoc.org/amsedu/online/info/samplecourse/b_act.html


LIDAR




LIDAR (light detecting and ranging) is a method of detecting distant objects and determining their position, velocity, or other characteristics by analysis of pulsed laser light reflected from their surfaces.
In this example, the U.S. Geological Survey (USGS) and NASA scientists studied Mount St. Helens using LIDAR technology to analyze changes in the surface elevation of this crator which began deforming in late September 2004. Elevation differences in the crater were found between two airborne LIDAR surveys conducted in September 2003 and October 4, 2004. The image is a computer-generated representation of the October 4 topography. In this image colors indicate areas of change.
http://www.nasa.gov/centers/goddard/earthandsun/mshelenslidar.html


Doppler Radar





Doppler radar is used to show velocities of precipitation.
This Doppler image was taken as Hurricane Claudette made landfall in Texas on July 15, 2003.
http://www.noaanews.noaa.gov/stories/s1192.htm

Black and White Aerial Photo



This black and white photo is of Pearl Harbor.


Wednesday, June 24, 2009

Infrared Aerial Photo



Infrared photographs are created using a film that better shows features that may have similar shades between them in an arial black and white photo. It is often used to document changes in environment (vegitation growth or destruction), insects, etc.
This infrared photo shows Onondaga Lake Watershed in New York.

Cartographic Animation


Cartographic animations show changes in a graphic over time.
This cartographic animation shows wind speeds and direction throughout the world over the period of one year.


Statistical Map



Statistical maps show elements of importance or interest or pertaining to a theme. They are also called distribution maps.
This is a map of a person's brain. The statistics in this map represent signals to the brain in an experiment after the subject was made "breathless".
http://symptomresearch.nih.gov/chapter_23/sec8/cahs8pg1.htm