Two techniques for exploring non-stationarity in geographical data

A. Stewart Fotheringham, Martin Charlton, Christopher Brunsdon

Research output: Contribution to journalArticle

88 Scopus citations

Abstract

This paper is concerned with the exploratory analysis of non-stationarity, the variation in parameter estimates across data sets, in spatial data. Two modelling paradigms are demonstrated in which local variation in the structure of a model is considered rather than the fitting of a global model to a set of spatial data. Using data for an area in North East Scotland, we first demonstrate some problems of non-stationarity in a multiple regression model using a moving window to fit a large number of local models within the study area, the results of the modelling being visualised in a GIS environment. In particular we examine the localised variation in the model coefficients and goodness of fit. The second technique consists of a more formal modelling framework in which spatial non-stationarity can be both measured and modelled. This technique is known as Geographically Weighted Regression (GWR) and an empirical example of the technique is described using data on the relationship between health and socio-economic data in the city of Newcastle in Northeast England.

Original languageEnglish (US)
Pages (from-to)59-82
Number of pages24
JournalGeographical Systems
Volume4
Issue number1
StatePublished - Dec 1 1997
Externally publishedYes

    Fingerprint

Keywords

  • Exploratory spatial data analysis
  • Geographically Weighted Regression
  • Moving window
  • Spatial non-stationarity
  • Visualisation

ASJC Scopus subject areas

  • Earth and Planetary Sciences (miscellaneous)

Cite this