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All Outputs (14)

The Visvalingam algorithm metrics, measures and heuristics (2016)
Journal Article
Visvalingam, M. (2016). The Visvalingam algorithm metrics, measures and heuristics. The Cartographic journal, 53(3), 242-252. https://doi.org/10.1080/00087041.2016.1151097

This paper provides the background necessary for a clear understanding of forthcoming papers relating to the Visvalingam algorithm for line generalization, for example on the testing and usage of its implementations. It distinguishes the algorithm fr... Read More about The Visvalingam algorithm metrics, measures and heuristics.

A computer science perspective on the bendsimplification algorithm (1999)
Journal Article
Visvalingam, M., & Herbert, S. (1999). A computer science perspective on the bendsimplification algorithm. Cartography and Geographic Information Science, 26(4), 253-270. https://doi.org/10.1559/152304099782294177

The primary aim of this study was to evaluate whether the use of bends provides a better basis than point elimination for research on line structuring. These investigations were undertaken using Arc/Info 7.1.1. Comparative experimental results sugges... Read More about A computer science perspective on the bendsimplification algorithm.

Deconstruction of fractals and its implications for cartographic education (1999)
Journal Article
Visvalingam, M. (1999). Deconstruction of fractals and its implications for cartographic education. The Cartographic journal, 36(1), 15-29. https://doi.org/10.1179/caj.1999.36.1.15

The research reported here was designed for two reasons: firstly, to involve anyone with an interest in cartographic visualization to participate in eliciting cartographic knowledge and to provide them with the opportunity to contribute their practic... Read More about Deconstruction of fractals and its implications for cartographic education.

A cognitive approach to road recognition with novel feature indicators (1996)
Journal Article
Varley, D., Visvalingam, M., & Wright, C. (1996). A cognitive approach to road recognition with novel feature indicators. Computer Journal, 39(9), 751-756. https://doi.org/10.1093/comjnl/39.9.751

This paper outlines a simple strategy for recognition of prototypical cases of urban roads from their outline forms alone. Two new form indicators, namely exits and occupancy, are used together with average width to label regions as roads. They prove... Read More about A cognitive approach to road recognition with novel feature indicators.

Trends and concerns in digital cartography (1990)
Journal Article
Visvalingam, M. (1990). Trends and concerns in digital cartography. Computer aided design, 22(3), 115-130. doi:10.1016/0010-4485(90)90070-s

Digital cartography is the technology concerned with the construction and use of computer-based systems for the practice of cartography and its applications. The paper starts with a brief introduction to cartography and cartographic maps. It then pro... Read More about Trends and concerns in digital cartography.

Cartography, GIS and maps in perspective (1989)
Journal Article
Visvalingam, M. (1989). Cartography, GIS and maps in perspective. The Cartographic journal, 26(1), 26-32. doi:10.1179/caj.1989.26.1.26

The signed Chi-score measure for the classification and mapping of polychotomous data (1981)
Journal Article
Visvalingam, M. (1981). The signed Chi-score measure for the classification and mapping of polychotomous data. The Cartographic journal, 18(1), 32-43. https://doi.org/10.1179/caj.1981.18.1.32

Several polychotomous characteristics, when expressed in chi-score form, exhibit distributions in property space which deviate from the inherent assumptions of the more commonly used methods of cluster analysis. This paper suggests a novel approach t... Read More about The signed Chi-score measure for the classification and mapping of polychotomous data.

Making a national atlas of population by computer (1980)
Journal Article
Rhind, D. W., Evans, I. S., & Visvalingam, M. (1980). Making a national atlas of population by computer. The Cartographic journal, 17(1), 3-11. https://doi.org/10.1179/caj.1980.17.1.3

This paper describes the conceptual and practical problems encountered and solved in producing a multi-colour atlas of population characteristics in Great Britain. The atlas itself is in A4 format; it consists of some thirty-four maps of Great Britai... Read More about Making a national atlas of population by computer.

Indexing with coded deltas—a data compaction technique (1976)
Journal Article
Visvalingam, M. (1976). Indexing with coded deltas—a data compaction technique. Software: Practice and Experience, 6(3), 397-403. https://doi.org/10.1002/spe.4380060313

The paper describes the coded delta scheme, which is one of the methods used by the Census Research Unit, University of Durham, for compacting the 1971 U.K. census data. It evaluates the merits and limitations of the technique in relation to the char... Read More about Indexing with coded deltas—a data compaction technique.

Well-point techniques and the shallow water table in boulder clay (1974)
Journal Article
Visvalingam, M., & Visvalingam, M. (1974). Well-point techniques and the shallow water table in boulder clay. The Journal of soil science, 25(4), 505-516. https://doi.org/10.1111/j.1365-2389.1974.tb01145.x

The reliability of water-table measurements in clay soil is currently under review (Twocock, 1971; Bonell, 1971; Visvalingam, 1972). This paper summarizes some of the experimental results from a boulder clay catchment in East Yorkshire. The experimen... Read More about Well-point techniques and the shallow water table in boulder clay.

Deviation of the Sungei Mulia (1970)
Journal Article
Visvalingam, M. (1970). Deviation of the Sungei Mulia. Geographica : journal of the Department of Geography, and Geographical Society, University of Malaya, Kuala Lumpur, 6, 123-129

Changes in land use triggering the instability of canalised river channels in padi fields in the Gombak Valley, Selangor, Malaysia.

Problems of hydrological research in padi areas (1969)
Journal Article
Visvalingam, M. (1969). Problems of hydrological research in padi areas. Geographica : journal of the Department of Geography, and Geographical Society, University of Malaya, Kuala Lumpur, 5, 91-98

Changes in land use triggering the instability of canalised river channels in padi fields in the Gombak Valley, Selangor, Malaysia.