State Koeppen's scheme of classification of climate.

The Koeppen's scheme of classification of climate are:
i. Koeppen identified a close relationship between the distribution of vegetation and climate.

ii. He selected certain values of temperature and precipitation and related them to the distribution of vegetation and used these values for classifying the climates.

iii. It is an empirical classification based on mean annual and mean monthly temperature and precipitation data. He introduced the use of capital and small letters to designate climatic groups and types.