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List of tables and displays | |
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Preface | |
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Acknowledgements | |
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Introduction to issues in the analysis of spatially referenced data | |
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Introduction | |
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Notes | |
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Issues in analysing spatial data | |
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Spatial data: sources, forms and storage | |
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Sources: quality and quantity | |
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Forms and attributes | |
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Data storage | |
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Spatial data analysis | |
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The importance of space in the social and environmental sciences | |
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Measurement error | |
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Continuity effects and spatial heterogeneity | |
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Spatial processes | |
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Types of analytical problems | |
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Problems in spatial data analysis | |
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Conceptual models and inference frameworks for spatial data | |
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Modelling spatial variation | |
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Statistical modelling of spatial data | |
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Dependency in spatial data | |
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Spatial heterogeneity: regional subdivisions and parameter variation | |
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Spatial distribution of data points and boundary effects | |
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Assessing model fit | |
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Distributions | |
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Extreme data values | |
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Model sensitivity to the areal system | |
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Size-variance relationships in homogeneous aggregates | |
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A statistical framework for spatial data analysis | |
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Data adaptive modelling | |
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Robust and resistant parameter estimation | |
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Robust estimation of the centre of a symmetric distribution | |
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Robust estimation of regression parameters | |
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Notes | |
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Parametric models for spatial variation | |
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Statistical models for spatial populations | |
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Models for spatial populations: preliminary considerations | |
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Spatial stationarity and isotropy | |
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Second order (weak) stationarity and isotropy | |
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Second order (weak) stationarity and isotropy of differences from the mean | |
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Second order (weak) stationarity and isotropy of increments | |
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Order relationships in one and two dimensions | |
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Population models for continuous random variables | |
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Models for the mean of a spatial population | |
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Trend surface models | |
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Regression model | |
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Models for second order or stochastic variation of a spatial population | |
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Interaction models for V of a MVN distribution | |
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Interaction models for other multivariate distributions | |
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Direct specification of V | |
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Intrinsic random functions | |
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Population models for discrete random variables | |
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Boundary models for spatial populations | |
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Edge structures, weighting schemes and the dispersion matrix | |
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Conclusions: issues in representing spatial variation | |
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Notes | |
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Simulating spatial models | |
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Statistical analysis of spatial populations | |
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Model selection | |
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Statistical inference with interaction schemes | |
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Parameter estimation: maximum likelihood (ML) methods | |
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[mu] unknown; V known | |
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[mu] known; V unknown | |
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[mu] and V unknown | |
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Models with non-constant variance | |
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Parameter estimation: other methods | |
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Ordinary least squares and pseudo-likelihood estimators | |
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Coding estimators | |
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Moment estimators | |
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Parameter estimation: discrete valued interaction models | |
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Properties of ML estimators | |
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Large sample properties | |
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Small sample properties | |
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A note on boundary effects | |
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Hypothesis testing for interaction schemes | |
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Likelihood ratio tests | |
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Lagrange multiplier tests | |
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Statistical inference with covariance functions and intrinsic random functions | |
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Parameter estimation: maximum likelihood methods | |
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Parameter estimation: other methods | |
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Properties of estimators and hypothesis testing | |
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Validation in spatial models | |
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The consequences of ignoring spatial correlation in estimating the mean | |
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Notes | |
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Spatial data collection and preliminary analysis | |
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Sampling spatial populations | |
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Introduction | |
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Spatial sampling designs | |
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Point sampling | |
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Quadrat and area sampling | |
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Sampling spatial surfaces: estimating the mean | |
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Fixed populations with trend or periodicity | |
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Populations with second order variation | |
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Results for one-dimensional series | |
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Results for two-dimensional surfaces | |
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Standard errors for confidence intervals and selecting sample size | |
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Sampling spatial surfaces: second order variation | |
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Kriging | |
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Scales of variation | |
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Sampling applications | |
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Concluding comments | |
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Preliminary analysis of spatial data | |
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Preliminary data analysis: distributional properties and spatial arrangement | |
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Univariate data analysis | |
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General distributional properties | |
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Spatial outliers | |
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Spatial trends | |
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Second order non-stationarity | |
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Regional subdivisions | |
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Multivariate data analysis | |
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Data transformations | |
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Preliminary data analysis: detecting spatial pattern, testing for spatial autocorrelation | |
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Available test statistics | |
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Constructing a test | |
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Interpretation | |
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Choosing a test | |
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Describing spatial variation: robust estimation of spatial variation | |
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Robust estimators of the semi-variogram | |
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Robust estimation of covariances | |
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Concluding remarks | |
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Notes | |
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Modelling spatial data | |
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Analysing univariate data sets | |
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Describing spatial variation | |
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Non-stationary mean, stationary second order variation: trend surface models with correlated errors | |
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Non-stationary mean, stationary increments: semi-variogram models and polynomial generalised covariance functions | |
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Discrete data | |
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Interpolation and estimating missing values | |
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Ad hoc and cartographic techniques | |
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Distribution based techniques | |
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Sequential approaches (sampling a continuous surface) | |
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Simultaneous approaches | |
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Extensions | |
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Obtaining areal properties | |
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Reconciling data sets on different areal frameworks | |
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Categorical data | |
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Other information for interpolation | |
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Notes | |
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Analysing multivariate data sets | |
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Measures of spatial correlation and spatial association | |
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Correlation measures | |
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Measures of association | |
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Regression modelling | |
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Problems due to the assumptions of least squares not being satisfied | |
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Problems of model specification and analysis | |
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Model discrimination | |
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Specifying W | |
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Parameter estimation and inference | |
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Model evaluation | |
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Interpretation problems | |
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Problems due to data characteristics | |
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Numerical problems | |
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Regression applications | |
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Model diagnostics and model revision (a) new explanatory variables | |
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Model diagnostics and model revision (b) developing a spatial regression model | |
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Regression modelling with census variables: Glasgow health data | |
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Identifying spatial interaction and heterogeneity: Sheffield petrol price data | |
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Notes | |
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Robust estimation of the parameters of interaction schemes | |
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Postscript | |
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Glossary | |
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References | |
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Index | |