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What is Quadrilateral

Chapter 13
Handbook of Research on Geoinformatics
A closed polygon with four vertices, and thus four sides. Quadrilaterals, or quads, can be planar, in which case all vertices lie on the same plane, or non-planar. With non-planar quadrilaterals (sometimes called bow ties, because of their shape), it is more difficult to calculate orientation and lighting, and thus many systems tessellate quads to triangles, which are definitively planar.
Published in Chapter:
About the Point Location Problem
José Poveda (University of Texas, USA) and Michael Gould (Universitat Jaume I, Spain)
Copyright: © 2009 |Pages: 6
DOI: 10.4018/978-1-59140-995-3.ch013
Abstract
In this chapter we present some well-known algorithms for the solution of the point location problem and for the more particular problem of point-in-polygon determination. These previous approaches to the problem are presented in the first sections. In the remainder of the paper, we present a quick location algorithm based on a quaternary partition of the space, as well as its associated computational cost.
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