Category Archives: Class Notes

Drainage Basin

Posted on August 30, 2010 by Rashid Faridi

The land based part of the hydrological cycle is called the Drainage Basin System. A drainage basin is the name given to the area of land which is drained by a river. When water reaches the surface there are a … Continue reading →

Posted in Class Notes, water | 3 Comments

Latitude and Longitude

Posted on May 14, 2009 by Rashid Faridi

Location on the Earth The earth is effectively a sphere, so how do we describe where a point is on its surface? The most common way to locate points on the surface of the Earth  is by standard, geographic coordinates … Continue reading →

Posted in Class Notes, map making | 7 Comments

Zenith and Nadir

Posted on April 26, 2009 by Rashid Faridi

The zenith is the direction pointing directly above a particular location (perpendicular, orthogonal). Since the concept of being above is itself somewhat vague, scientists define the zenith in more rigorous terms. Specifically, in astronomy, geophysics and related sciences (e.g., meteorology), … Continue reading →

Posted in Class Notes, Geography Practicals/Lab and Statistical Techniques, Solar System | 3 Comments

Celestial sphere

Posted on April 12, 2009 by Rashid Faridi

In astronomy and navigation, the celestial sphere is an imaginary rotating sphere of “gigantic radius”, concentric and coaxial with the Earth. All objects in the sky can be thought of as lying upon the sphere. Projected from their corresponding geographic … Continue reading →

Posted in Class Notes, Geography Practicals/Lab and Statistical Techniques, Solar System | 6 Comments