NDLI: Parallel Processing for Terrain Analysis in GIS: Visibility as a Case Study

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Parallel Processing for Terrain Analysis in GIS: Visibility as a Case Study

Content Provider	Springer Nature Link
Author	Kidner, David B. Rallings, Philip J. Ware, J. Andrew
Copyright Year	1997
Abstract	The application of parallel processing to computationally intensive GIS problems has been advocated and illustrated by many researchers over the last twenty years. Despite this, GIS users have been slow to capitalize on the potential which the technology offers. Whilst today’s processors are adequate for the majority of GIS uses, some applications are too processor-intensive to be deemed viable for serial machines. This is particularly true of many digital terrain modelling applications, which has been the primary focus of parallel processing in GIS to date.This paper considers the problem of parallelizing line-of-sight (LOS) calculations in determining the visibility indices of entities such as elevation vertices in a digital terrain model (DTM). This is a requirement of site selection for a particular development, especially if visibility, or more specifically, visual intrusion is likely to be a key factor in gaining planning approval. To demonstrate the simplicity and applicability of parallelizing such GIS problems, this paper presents some parallel approaches in an efficient data organization, framework using a Transputer network. Speed-up performance can be increased by a factor of twelve using a simple network of twenty Transputers. As vast quantities of spatial data become available, particularly DTMs at larger scales and denser resolution, the demands for parallel processing will inevitably increase. It is hoped that the continued experiences of today’s researchers at applying parallel processing to well-defined problems will benefit the GIS users of tomorrow.
Starting Page	183
Ending Page	207
Page Count	25
File Format	PDF
ISSN	13846175
Journal	GeoInformatica
Volume Number	1
Issue Number	2
e-ISSN	15737624
Language	English
Publisher	Kluwer Academic Publishers
Publisher Date	1997-01-01
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Computer Science Data Structures, Cryptology and Information Theory Information Storage and Retrieval Multimedia Information Systems
Content Type	Text
Resource Type	Article
Subject	Geography, Planning and Development Information Systems

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
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