Category Archives: Uncategorized

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 →

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 →

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 →

There are several ways to classify the wide variety of map projections. One of the most common classifications is by distortion characteristics: which properties of the Earth does the projection maintain? Which does it distort? Classification based on distortion characteristics … Continue reading →