A software tool to measure and attribute spatially stratified heterogeneity |
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Fig. 1. Principle of Geodetector q-statistic (Wang et
al 2016) (The bottom map, the color
indicates the values of a population Y.
The top map, the population Y is
composed of L strata (h = 1, 2, …, L), which are partitioned either by Y itself or by an explanatory variable X. The terms “stratification” and “partition” are equivalent, can
be either classification or zonation. Between the two maps is the equation q(Y
| X), in which the numerator is
the summation of the within strata variance and the denominator is the pooled
variance; N and s^{2} stand for the number
of units and the variance of Y in a
study area, respectively. [(N-L)q]/[(L-1)(1-q)] ~ F(L-1, N-L, g), where g is a non central parameter) |
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Articles
using Geodetector [Numbered] |