Blog Archives

Shortest Path Computation: A Comparative Analysis

Current research work into establishing a performance efficiency hierarchy between Java, C++ and ArcView is described and experimentation is performed in order to statistically compare shortest path query execution time, response time and implementation issues.

Posted in my PUBLIC PRESENCE
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MFworks Tutorial

This tutorial, developed in 2002, is a showcase on network analysis in MFworks, with step by step instructions and a summary of the theory behind it.

Posted in THIS and THAT
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How to make a straight line square

Traditionally, network analysis, path finding and route planning have been the domain of graph theory and vector GIS, which is where most algorithms find their application. Contrary to such common wisdom, the research of this thesis for the Msc in GIS explores the topic of network analysis in raster GIS, using MFworks as example software.

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Fastest path problems in dynamic transportation networks

This research essay and literature review investigates some of the gateways to path finding in static and dynamic networks that are listed in present research literature. A selected set of different approaches are highlighted and set in a broader context, illustrating the various aspects of path finding in static and dynamic networks.

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Network analysis – raster versus vector – A comparison

The key to producing successful network models is in understanding the relationship between the characteristics of physical network systems and the representation of those characteristics by the elements of the network model.

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ARTICLES and PAPERS
Accessibility Index - Transport Network Vulnerability
Taylor, M., Sekhar, S., & D'Este, G. (2006). Application of Accessibility Based Methods for Vulnerability Analysis of Strategic Road Networks Networks and Spatial Economics, 6 (3-4), 267-291
I had the pleasure of meeting M.A.P. Taylor at the 3rd International Symposium on Transport Network [...]
A new and better way of classifying and managing risks?
Risk. The probability of an event occurring and the consequences of the event occurring. That is how[...]
BOOKS and BOOK CHAPTERS
Book Review:Managing Risks in Supply Chains
To make up for yesterday's perhaps overly harsh critique of just one article from this book, this is[...]
Book Review: This is where raster GIS started...
...well not really, but Geographic Information Systems and Cartographic Modeling by Dana Tomlin spar[...]
REPORTS and WHITEPAPERS
Risky cities - want to work there?
If you are doing global business, do you know where you are at risk and what risk that is most perti[...]
A Decade of Living Dangerously
Do you remember the movie The Year of Living Dangerously with Mel Gibson? Topically unrelated maybe,[...]
from HERE and THERE
Will your business byte the dust?
To backup or not to backup? Honestly, you shouldn't even be asking yourself this question. Can you a[...]
How to use IDRISI GIS
Decision making is the process that leads to a choice between a set of alternatives. Geographical de[...]