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Many public organizations are working on the construction of spatial data infrastructures (SDI) that will enable them to share their geographic information. However, not only geographic data are managed in these SDIs, and, in general, in Geographic Information Systems (GIS), but also many textual documents must be stored and retrieved (such as urban planning permissions and administrative files...

This paper presents the design and development of an open source web-based Geographical Information System allowing users to visualise, customise and interact with spatial data within their web browser. The developed application shows that by using solely Open Source software it was possible to develop a customisable web based GIS application that provides functions necessary to convey health a...

This paper explores the developments which have precipitated the use and integration of Geographical Information Systems (GIS) within the South African Police Services (SAPS). The paper provides a historical overview of GIS within South Africa, supplemented with the legislative origins of the integration of GIS within policing in the country. Various geo-analytic operations that GIS technology ...

Landscapes in agricultural systems continue to undergo significant change, and the loss of biodiversity is an ever-increasing threat. Although habitat restoration is beneficial, management actions do not always result in the desired outcome. Managers must understand why management actions fail; yet, past studies have focused on assessing habitat attributes at a single spatial scale, and often f...

Geographic information systems (GIS) and analyses based on GIS have become widespread and well accepted. GIS is not the complete solution to understanding the distribution of disease and the problems of public health but is an important way in which to better illuminate how humans interact with their environment to create or deter health.

An index of biotic integrity (IBI) was developed for freshwater fish in New Zealand streams. Data on freshwater fish occurrence for 5497 sites over the entire country were obtained from the New Zealand freshwater fish database for the period 1980-2002. Environmental habitat descriptors for the stream watersheds above or at each of these sites were obtained from an existing river environment cla...

The establishment of several large area monitoring networks over the past few decades has led to increased research into ways to spatially balance sample locations across the landscape. Many of these methods are well documented and have been used in the past with great success. In this paper, we present a method using geographic information systems (GIS) and fractals to create a sampling frame,...