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| Lokal kernedensitetsestimering× | Hot Spot Analysis (Getis-Ord Gi*)× | |
|---|---|---|
| Fagområde | Rumlig analyse | Rumlig analyse |
| Familie | Regression model | Regression model |
| Oprindelsesår≠ | 1985-1986 | 1992 |
| Ophavsperson≠ | Silverman, B. W.; Diggle, P. J. | Arthur Getis and J. Keith Ord |
| Type≠ | Non-parametric density estimator | Local spatial statistic |
| Oprindelig kilde≠ | Silverman, B. W. (1986). Density Estimation for Statistics and Data Analysis. Chapman and Hall, London. ISBN: 978-0412246203 | Getis, A., & Ord, J. K. (1992). The analysis of spatial association by use of distance statistics. Geographical Analysis, 24(3), 189-206. DOI ↗ |
| Aliasser | Local KDE, adaptive KDE, spatially adaptive kernel density estimation, local density estimation | Getis-Ord Gi* statistic, spatial hot spot detection, cluster and outlier analysis, HSA |
| Relaterede | 5 | 5 |
| Resumé≠ | Local Kernel Density Estimation (Local KDE) is a non-parametric spatial method that estimates the density of point events at each location by applying a kernel function with a spatially adaptive bandwidth. Unlike global KDE, which uses a fixed bandwidth across the entire study area, Local KDE adjusts the smoothing window according to local data density, capturing fine-scale clustering where events are sparse or concentrated. | Hot Spot Analysis uses the Getis-Ord Gi* local spatial statistic to identify geographic locations where high or low attribute values cluster together to a degree that is statistically significant. Each feature is evaluated in relation to its neighbours, producing a z-score that flags genuine spatial hot spots and cold spots against a background of random variation. |
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