Koppen's climatic classification was based on both rainfall and temperature. This classification system divides the world's climates into five main groups based on average monthly temperature and precipitation. The groups are tropical, dry, temperate, continental, and polar. Within each group, there are further subdivisions based on variations in climate patterns.
Koppen's classification system is widely used in the fields of geography, ecology, and climatology to study and understand the distribution of different climate types across the world. It is helpful for predicting and studying the impact of climate change on various regions and ecosystems, and for identifying suitable areas for agricultural and economic development.