CEE Measurements--Chapter One

# CEE Measurements--Chapter One - Chapter One Int roduction...

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Chapter One Introduction: Surveying which has recently also been interchangeably called Geomatics has traditionally been defined as the science, art, and technology of determining the relative positions of points above on or beneath the earth’s surface, or of establishing such points. Historically surveyors made their measurements using ground based methods and until rather recently the transit and tape were their primary instruments. Two general classifications of surveys are o Geodetic and Plane. They differ principally in the assumptions on which the computations are based, although field measurements for geodetics surveys are usually performed to a higher order of accuracy than those for plane surveys. o In Geodetic surveying the curved surface of the earth is considered by performing the computations on an ellipsoid. It is now common to do geodetic computations in a three dimensional earth centered Cartesian coordinate system. o Geodetic methods are employed to determine relative positions of widely spaced monuments and to compute lengths and directions of the long lines between them. These monuments serve as the basis for referencing

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## This note was uploaded on 05/05/2011 for the course CEE 2814 taught by Professor Jbconnor during the Spring '08 term at Virginia Tech.

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CEE Measurements--Chapter One - Chapter One Int roduction...

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