We took the systems view of geographic information systems (GIS), describing such technologies as a set of linked components used to capture, store, transform, analyse and display geographical data. In early GIS each of these components might exist as separate programs, with the output from one forming the input to another. Today users expect much greater integration and interoperability, and desktop GIS have become powerful and widely used tools for managing a wide range of geographical information. Continue reading GEODEMOGRAPHIC INFORMATION SYSTEMS AND ANALYSIS
How the following retail question might be answered within a GI analytical environment? Suppose a consumer lives at location i (to be found at coordinate xi, yi) then what is the likelihood that they will visit a particular retail store at some other location j (at coordinate xi, yi)? Continue reading SPATIAL INTERACTION MODELS – Richard Harris, Peter Sleight, Richard Webber
Over the past few years there has been a remarkable increase in interest is GIS. Many of the earliest users were in universities, government departments and environmental agencies. Activity in these traditional core areas is now being supplemented by vigorous growth in several emerging markets, the most important one being business and service planning. For many of these new users, the GIS focus to date has been basic mapping and asset management. Other, more advanced, users are modelling data held in integrated databases. This modelling activity is frequently referred to as spatial analysis.
WHAT IS SPATIAL ANALYSIS?
“Spatial analysis” is one of those terms that are so widely used in so many different contexts that it is difficult to define succinctly. Good child (1988, p; 68) offers a good general definition of spatial analysis as “that set of analytical methods which require access both to the attributes of the objects under study and to their locational information”. Openshaw (1991b, p. 18) suggests that what geographers refer to as “spatial statistics”. Anselin (1989) and Goodchild et. Al (1992) prefer to use the term “spatial data analysis” although there seems to be no substantial difference. Continue reading Implementing Spatial Analysis and GIS Applications for Business and Service Planning