1. Regions are identified on the basis of common characteristics, contiguity, personality and similarity, for example, physiographical regions, climatic regions, forest regions, administrative regions, etc.
2. Each such region has its own identity and with respect to its distinctiveness, stands out from the other regions.
3. The process of segregating (separate) an area into smaller segments is called regionalization. The bases for regionalization differ; therefore regions may be demarcated according to the criteria (measure) used.
4. Regions are identified on the basis of one or multiple factors. Economic regions are based on industries, transportation, trade etc. agricultural regions are formed according to crops, crop-combination, etc. social and cultural regions are based on population, sex ratio, migration, language, etc.
5. In each region, there are one or more core (center) areas, where the geographical pattern is well developed.
6. Physical regions are identified on the basis of physical factors like origin, location, relief, rock types, landforms, climate, soils, forests, etc.
7. For most of the physical regions, boundaries are drawn roughly on maps, because they are mostly in the form of transitional zone.
