Spatial Autocorrelation Using MCD Tax Rate as An Example: 

A negative autocorrelation is found. Referring the land use change maps on the website, it is likely that the areas faced with the greatest increase in low-density residential land use are the same ones (yellow areas) that are negatively correlated with an increase in MCD tax rate. The negative autocorrelation is possibly due to the fact that the development of sewer zones is a spatially continuous process, which somehow dictates the occurrence of new larger patches of low-density residential land use. It is possible that the green areas are those developed before 1985 while the yellow areas are those developed between 1985 and 1995 and overlaid with a new sewer zone planed or built between 1985 and 1995.