Monthly Archives: February 2008

Urban Change in India

Posted on February 13, 2008 by Rashid Faridi

Urban populations in India are concentrated in the six most developed states Maharashtra, Gujarat, Tamil Nadu, Karnataka, West Bengal and Punjab where rates of urbanisation remained the same or increased during the 1990s. On the other hand urbanisation rates slowed … Continue reading →

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What is inside a Typical Satellite?

Posted on February 13, 2008 by Rashid Faridi

Satellites come in all shapes and sizes and play a variety of roles. For example: * Weather satellites help meteorologists predict the weather or see what’s happening at the moment. Typical weather satellites include the TIROS, COSMOS and GOES satellites. … Continue reading →

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Datum, Ellipsoid, Rhumb Line, Secant, Spheroid, Tangent and other useful terms in Map Projection

Posted on February 12, 2008 by Rashid Faridi

Datum—A reference for position on the surface of the Earth. In surveying, a datum is a reference system for computing or correlating the results of surveys. There are two principal types of datums: vertical and horizontal. A vertical datum is … Continue reading →

Posted in Class Notes, Geography Practicals/Lab and Statistical Techniques, map making | 4 Comments

GPS Receivers: Method of Operation

Posted on February 12, 2008 by Rashid Faridi

A typical GPS receiver calculates its position using the signals from four or more GPS satellites. Four satellites are needed since the process needs a very accurate local time, more accurate than any normal clock can provide, so the receiver … Continue reading →

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