"Clustering"
Overall trend where the distribution of values follows a particular pattern over space
**[Positive]** Similar values close to each other (high-high, low-low) **[Negative]** Similar values far from each other (high-low) How to measure it???- Graphical device that displays a variable on the horizontal axis against its spatial lag on the vertical one
- Variable and spatial weights matrix are preferably standardized
- Asssessment of the overall association between a variable in a given location and in its neighborhood
Formal test of global spatial autocorrelation
Statistically identify the presence of clustering in a variable
Slope of the Moran plot
Inference based on how likely it is to obtain a map like observed from a purely random pattern
<script type="math/tex; mode=display">
I = \dfrac{N} {\sum_{i} \sum_{j} w_{ij}} \dfrac {\sum_{i} \sum_{j}
w_{ij}(Z_i) (Z_j)} {\sum_{i} (Z_i)^2}
</script>
A course on Geographic Data Science by Dani Arribas-Bel is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.
