Line generalisation by repeated elimination of points
Visvalingam, M.; Visvalingam, Maheswari; Whyatt, J. D.
J. D. Whyatt
This paper presents a new approach to line generalisation which uses the concept of ‘effective area’ for progressive simplification of a line by point elimination. Two coastlines are used to compare the performance of this, with that of the widely used Douglas-Peucker, algorithm. The results from the area-based algorithm compare favourably with manual generalisation of the same lines. It is capable of achieving both imperceptible minimal simplifications and caricatural generalisations. By careful selection of cutoff values, it is possible to use the same algorithm for scale-dependent and scale-independent generalisations. More importantly, it offers scope for modelling cartographic lines as consisting of features within features so that their geometric manipulation may be modified by application- and/or user-defined rules and weights. The paper examines the merits and limitations of the algorithm and the opportunities it offers for further research and progress in the field of line generalisation. © 1993 Maney Publishing.
|Publication Date||Jan 1, 1993|
|Journal||The cartographic journal|
|Peer Reviewed||Peer Reviewed|
|Institution Citation||Visvalingam, M., & Whyatt, J. D. (1993). Line generalisation by repeated elimination of points. The Cartographic journal, 30(1), 46-51. https://doi.org/10.1179/000870493786962263|
|Copyright Statement||© The British Cartographic Society 1993|
|Additional Information||Copy of an article published in The cartographic journal, 1993, v.30, iss.1 at: https://www.tandfonline...1179/000870493786962263 This is related to the CISRG discussion paper 10 at: https://hydra.hull.ac.uk/resources/hull:8338|
© The British Cartographic Society 1993