21-03-2012, 04:53 PM
Remote Sensing
workout.ppt (Size: 4.59 MB / Downloads: 65)
Remote + Sensing
Acquiring information about an area or a phenomenon without coming into physical contact with it .
Transferring of information through space by use of electromagnetic radiation.
INTRODUCTION
Early 1800’s – Louis Daguerre – beginning of photography
1850s- 1900’s – Photographs taken by captive balloons, pigeons
World War I – Aerial photography
1920s – Photogrammetry
– Routine applications for government programs
– Mapping, surveys, etc.
World War II – Use of electromagnetic spectrum increases to include
infrared and microwave
“Cold War” – extensive use of reconnaissance techniques – launching of
‘spy’ satellites
1960s –TIROS – meteorological satellite
– First use of term “remote sensing”
Remote Sensing Process
Identifying the Problem
Since Remote sensing can be used in
numerous fields ,the methodology that is
subsequently applied to the problem is
usually dependent upon the origin of your
problem.
Information Output
Placing the information into a format that can be
transmitted effectively .
Because there are a variety of ways in which the
output can be displayed, a knowledge not only of
remote sensing, but of fields such as GIS,
cartography, and spatial statistics is a necessity.
With an understanding of these areas and how they
interact one with another, it is possible to produce
output that give the user the information needed
without confusion.