• Not so easy to build November 2, 2014

    As the theater begins with a hanger, and the house begins … No, not with the foundation, and not ...

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  • The Global Positioning System October 19, 2012

    The Global Positioning System GPS is a satellite navigation system that allows users to locate their approximate position on Earth. There are 27 satellites orbiting Earth, as shown in the below picture, for use with GPS units. ...

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  • Types of Maps - Projections October 12, 2012

    Projections Because Earth is spherical, it is difficult to represent on a piece of paper. Thus, all flat maps distort to some degree either the shapes or the areas of landmasses. Cartographers use projections to make maps. A map ...

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