Search results
Results From The WOW.Com Content Network
Triangulation of Kodiak Island in Alaska in 1929. In surveying, triangulation is the process of determining the location of a point by measuring only angles to it from known points at either end of a fixed baseline by using trigonometry, rather than measuring distances to the point directly as in trilateration. The point can then be fixed as ...
Locating the epicenter [ edit ] In most earthquakes, the isoseismals define a single clear area of maximum intensity, which is known as the epicentral or meizoseismal area. [ 8 ]
Triangulation today is used for many purposes, including surveying, navigation, metrology, astrometry, binocular vision, model rocketry and, in the military, the gun direction, the trajectory and distribution of fire power of weapons. The use of triangles to estimate distances dates to antiquity.
The macroseismic epicenter is the best estimate of the location of the epicenter derived without instrumental data. This may be estimated using intensity data, information about foreshocks and aftershocks, knowledge of local fault systems or extrapolations from data regarding similar earthquakes.
[Notes 9] Transforming the initial motion amplitudes in two horizontal directions into ground motion displacements, the azimuth angle can be determined using a trigonometric function. After the azimuth and epicentral distance are calculated, the epicenter position can be easily found. [11] This method is called the single station measurement ...
Position resection and intersection are methods for determining an unknown geographic position (position finding) by measuring angles with respect to known positions.In resection, the one point with unknown coordinates is occupied and sightings are taken to the known points; in intersection, the two points with known coordinates are occupied and sightings are taken to the unknown point.
There are several additional methods that can be used to measure tree heights from a distance that can produce reasonably accurate results. These include traditional surveying methods using a theodolite, cross-triangulation, the extended baseline method, the parallax method, and the triangle method.
Direct tracking and triangulation methods allow the operator to locate a tagged animal. Direct or VHF tracking involves using a directional antenna to follow the signal given off by the transmitter to the exact location of the tagged animal. [2] The operator rotates the antenna until the loudest signal is found.