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Discrete Spatial variables<br />

Example calculation of Thiessen Polygon<br />

First, all points are triangulated into a Triangular Irregular Network (TIN) that meets the Delaunay criterion.<br />

Then, the perpendicular bisectors of each triangle edge are generated, forming the edges of the Thiessen<br />

polygons. The locations at which the bisectors intersect determine the locations of the Thiessen polygon<br />

vertices.<br />

Example of buffering point features<br />

Buffer polygon or polygons can be created by using a constant buffer distance or variable buffer distance<br />

around the specified input point feature.<br />

http://www.gitta.info - Version from: 5.5.2010 16

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