Category Archives: Remote Sensing 101

Monitoring Global Climate Change

Posted on July 27, 2008 by Rashid Faridi

Sateellite imageries can be useful for monitoring Global Warming. On the basis of satellite data Climate scientists  issued a warning on global warming, prompting a UN demand for politicians to tackle the global warming crisis. Global average surface temperatures could … Continue reading →

Posted in Environment, Glaciers, Global Warming, Remote Sensing 101 | 1 Comment

GALILEO:European Satellite Navigation System

Posted on July 15, 2008 by Rashid Faridi

A permanent reference in time and space. Galileo is Europe’s contribution to a global navigation satellite infrastructure (GNSS). More and more often, it will become necessary to ascertain one’s precise position in space and time in a reliable manner. This … Continue reading →

Posted in GPS, Remote Sensing 101 | 1 Comment

GPS Accuracy and WAAS

Posted on July 13, 2008 by Rashid Faridi

To determine an object’s location, the GPS system must receive a radio signal from at least three satellites. Since each satellite emits a unique signal, the receiver can then match the signal to the satellite and its orbital position. Distance … Continue reading →

Posted in GIS, GPS, Remote Sensing 101 | Tagged | 3 Comments

Topology and Layers in GIS

Posted on June 27, 2008 by Rashid Faridi

TOPOLOGY & LAYERS (THEMES) Topology refers to the spatial relationships between geographic features. It describes the relationships between connecting or adjacent coverage features. Topological relationships are built from simple elements into complex elements: points (simplest elements), arcs (sets of connected … Continue reading →

Posted in GIS, Remote Sensing 101 | 3 Comments