You do this by zooming to an integer zoom level (an arbitrary fixed-scale experiment to see the effect of different values) and defining a point by latitude and longitude.
Based on a simple HVAC climate model, considered the effect of latitude, distributing of land and water, terrain and discrepancy on town and village, ascertained the parameter.
The meridional distribution of forecast temperature of IPCC models is the same to observation in china and the effect of simulation in lower latitude is better than middle and higher latitude.