Geographically Weighted Regression of Physical Activity Sites. Spatial distribution of local t-values from PAS GWR linear regression. Purple areas suggest positive association between physical activity site density and the independent variable, white areas suggest no statistically significant relationship, and gold areas suggest negative associations.
Maroko et al. International Journal of Health Geographics 2009 8:34 doi:10.1186/1476-072X-8-34