The views are simple files: the index and read views simply output the data assigned to them, applying minimal formatting, while the write view displays a form to be used when Posting to Blahg.

The pressure index of cultivated land is the ratio of per capita minimal area of cultivated land and per capita actual area of cultivated land.

Firstly spatial elements were taken as the minimal units and organized with a multi-scale index to describe the changes of quantity or property of elements brought with scale changes.