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GPS is such a technology whereby better and greater accuracy and flexibility of positioning for navigation, surveying and GIS data capture is given. The Remote Sensing and GPS NAVSTAR is a part of satellite-based navigation, timing and positioning system. It not only is able to provide timing and positioning system but gives constant three-dimensional positioning 24 hrs a day all through the world.
GPS technology is so convenient and beneficial that its user community can make better use of it by obtaining exact and precise data up to 100 meters for navigation, meter-level for mapping, and down to millimeter level for geodetic positioning. This GPS technology is consisted of a great deal amount of applications in GIS data collection, surveying, and mapping. The positioning is meant for the determination of stationary or moving objects or the objects whose stationary or movement is ascertained. The following are the ways they are determined.
- In terms of a well-defined coordinate system, generally by three coordinate values,
- And in respect of the other point, by taking one point as the origin of a local coordinate system.
- Point positioning is identified as the first mode of positioning, and the second is known as relative positioning.
- If the object, which is to be positioned, is positioning, then it is termed as static position.
- When the object takes a move, it is called kinematics positioning.
- Both have a different use, too; the static positioning is employed in order to surveying, while the kinematics position is made use for navigation.
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