Morphological Models for the Collapse of Area Features in Digital Map Generalization

Authors:
Bo Su;Zhilin Li;Graham Lodwick
Affiliations:
Vancouver R & D Center, Basic Co. Ltd., #200 6700 No. 3 Road, Richmond, British Columbia, Canada V6Y 2C3 bsu@basic-van.com;Department of Land Surveying and Geo-Informatics, Hong Kong Polytechnic University, Kowloon, Hong Kong. lszlli@polyu.edu.hk;School of Surveying and Land Information, Curtin University of Technology, Perth, Western Australia Lodwick_GD@cc.curtin.edu.au
Venue:
Geoinformatica
Year:
1998

Citing 2
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Image Analysis Using Mathematical Morphology

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Abstract

“Collapse” is an essential operation for the manipulation of area features in digital data generalization. This operation can be categorized into two types: complete collapse and partial collapse. The former is composed of another two types: area-to-point and area-to-line collapse. In this paper, a set of algebraic models built upon the operators in mathematical morphology is described for the area-to-line collapse and partial collapse operations. For the area-to-line collapse operation, a modified skeleton algorithm is presented. For the partial collapse operation, a procedure is designed which consists of a set of operations, i.e., the skeletonization, separation of areal and linear parts, simplification of areas and an overlay operation. These models are tested using real map data sets.