Human Settlements and Human Development
Domain 5: Human Settlements and Human Development
This domain covers where and how people settle, the difference between rural and urban functions, and how development is measured beyond income. Expect settlement-pattern identification and HDI reasoning.
Core rules
- Site and situation: site is the actual ground (river bank, hilltop, bridgehead); situation is the settlement's position relative to surrounding routes and resources.
- Patterns: compact or nucleated (clustered around a water source or defence point), dispersed (scattered farmsteads), linear (along a road, river or coast).
- Functions: rural settlements are mainly primary-activity based; urban settlements have secondary, tertiary and quaternary functions. Urbanisation is the rising share of population living in towns and cities.
- HDI: Human Development Index combines life expectancy, education (mean and expected years of schooling) and GNI per capita at purchasing power parity. It uses a geometric mean, so a weak dimension pulls the index down.
Worked example
Suppose a country's three HDI dimension indices are 0.80 (health), 0.60 (education) and 0.70 (income). The arithmetic mean would be 0.70, but HDI uses the geometric mean: cube root of (0.80 × 0.60 × 0.70) = cube root of 0.336 ≈ 0.695. The lower figure correctly penalises the weak education score. Reasoning: geometric mean is sensitive to low values, which is why HDI is not simply an average.
Traps
Do not use site and situation interchangeably. Do not label every clustered village as planned; nucleated settlements often grow around a well, temple, fort or crossroads. Do not equate high income with high HDI. Do not forget that HDI uses GNI per capita, not GDP per capita.