A topology construction from line drawings using a uniform plane subdivision technique
Identifieur interne : 002013 ( Main/Exploration ); précédent : 002012; suivant : 002014A topology construction from line drawings using a uniform plane subdivision technique
Auteurs : B. Žalik [Slovénie]Source :
- Computer-Aided Design [ 0010-4485 ] ; 1999.
English descriptors
Abstract
The paper describes an algorithm for constructing the topology from a set of line segments or polylines. The problem appears for example at land-maps that have been drawn by general-purpose drawing packages or captured from blue-prints by digitalisation. The solution comprises two steps; in the first step inconsistencies in the input data are detected and removed, and in the second step the topology is constructed. The algorithm for topology construction consists of two phases: determination of a concave hull, and generation of polygons. It is shown that the running-time of the presented algorithm is better than O(n2), where n is the number of input points. Because of a large number of geometric elements being expected, the geometric search needed at the first step of the algorithm is speeded up by an acceleration technique—a uniform plane subdivision.
Url:
DOI: 10.1016/S0010-4485(99)00034-2
Affiliations:
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