All Outputs (14)

Directory of research and development based on Ordnance Survey small scales digital data (1987)
Book
Visvalingam, M., & Kirby, G. (1987). Directory of research and development based on Ordnance Survey small scales digital data. University of Hull

From the Foreword: Although Digital Topographic Data can be used to assist in the production of some Ordnance Survey (OS) maps it has been clear for some years that the justification for the capture of digital data has to be that users require it... Read More about Directory of research and development based on Ordnance Survey small scales digital data.

The identification of demographic types : a preliminary report on methodology
Book
Visvalingam, M. The identification of demographic types : a preliminary report on methodology

The effects of the size of areal units on ratio and chi-square mapping
Book
Dewdney, J. C., & Visvalingam, M. The effects of the size of areal units on ratio and chi-square mapping

An examination of some area-based policies
Book
Visvalingam, M. An examination of some area-based policies

Area-based social indicators : problems and prospects
Book
Visvalingam, M. Area-based social indicators : problems and prospects

A locational index for the 1971 kilometre-square population census data for Great Britain
Book
Visvalingam, M. A locational index for the 1971 kilometre-square population census data for Great Britain

Storage of the 1971 UK Census data : some technical considerations
Book
Visvalingam, M. Storage of the 1971 UK Census data : some technical considerations

Chi-square as an alternative to ratios for statistical mapping and analysis
Book
Visvalingam, M. Chi-square as an alternative to ratios for statistical mapping and analysis

Storage of the grid-square based 1971 Great Britain census data : checking procedures
Book
Perry, B. J., & Visvalingam, M. Storage of the grid-square based 1971 Great Britain census data : checking procedures

Data interchange on industry-compatible tapes
Book
Norman, M. J., Sheehan, R., & Visvalingam, M. Data interchange on industry-compatible tapes

Testing implementations of Visvalingam's algorithm for line generalisation
Book
Visvalingam, M. Testing implementations of Visvalingam's algorithm for line generalisation

There are a growing number of open source and commercial implementations of the Visvalingam algorithm for line generalisation. The algorithm provides scope for implementation-specific interpretations, with different outcomes. This is inevitable and s... Read More about Testing implementations of Visvalingam's algorithm for line generalisation.

The impact of advances in information technology on the cartographic interface in social planning
Book
Kirby, G. H., & Visvalingam, M. The impact of advances in information technology on the cartographic interface in social planning

Geometric data for testing implementations of point reduction algorithms : case study using Mapshaper v 0.2.28 and previous versions
Book
Visvalingam, M. Geometric data for testing implementations of point reduction algorithms : case study using Mapshaper v 0.2.28 and previous versions

There are several open source and commercial implementations of the Visvalingam algorithm for line generalisation. The algorithm provides scope for implementation-specific interpretations, with different outcomes. This is inevitable and sometimes nec... Read More about Geometric data for testing implementations of point reduction algorithms : case study using Mapshaper v 0.2.28 and previous versions.

Bloch's function D for weighted effective areas : impact of tuning parameters
Book
Visvalingam, M. Bloch's function D for weighted effective areas : impact of tuning parameters

Abstract When Visvalingam’s algorithm was first presented, it was noted that it could be driven with any metric to suit different purposes, types of features and degrees of generalisation. It was illustrated with the concept of the effective area (EA... Read More about Bloch's function D for weighted effective areas : impact of tuning parameters.