Types of Regions in Regional Planning

• Regions are classified by the criteria chosen and the purpose in hand. No single typology is universally valid: the type a geographer, planner or administrator draws depends on the question being asked.
• The same territory can be several regions at once: a formal region by its physical uniformity, a functional region by its flows to a city, and a planning region for development. Classification is always purpose-dependent.
• Three basic types, formal (uniform), functional (nodal) and vernacular (perceptual), reflect three ways in which areas cohere: by similarity, by interaction and by perception. The planning region is the practical compromise between the first two.
• Further typologies rest on genesis, number of criteria, level of development, dominant activity and scale in a hierarchy of regions.

Frameworks of Regional Classification

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Bases of Classification

• Scale of study runs in five steps: macro-macro (a whole nation or State), macro (States within a nation), meso (districts), micro (a city or village) and micro-minor (a sector or household). By size alone, regions are macro, meso, micro and local.
• By principle, regions rest on homogeneity (natural, cultural, economic, or an amalgam of physical and cultural variables) or interlinking (commodity, information and capital flows, and human flows of migrants and commuters).
• By purpose, regions are planning, denoted or administrative.
• These frameworks overlap. A formal region may be single-feature or multiple-feature; a planning region may be formal, functional or both; a backward region is usually a formal region on composite criteria.

Boudeville’s Three Regions

• Jacques Boudeville matched François Perroux’s three kinds of economic space with three kinds of region, a scheme widely used in planning:
  • Homogeneous region: a continuous area whose parts have similar characteristics, such as per capita income, crop or industrial structure. Internal differences do not matter for the chosen criterion.
  • Polarised region: a heterogeneous area whose parts are bound by interdependence with a dominant centre, through more exchange with it than with any rival centre.
  • Planning (programme) region: an area under one decision-making authority, defined by the coherence of its economic decisions, whatever its physical make-up.
• The first two describe how space is organised; the third defines how it is governed for development.

Areal Homogeneity and Areal Linkage

• By areal homogeneity: physical regions (land, soil, climate, vegetation: savanna, black soil region, the Downs), economic regions (industrial and agricultural regions, special economic zones), cultural regions (Hindi heartland, tribal regions) and composite regions in which more than one feature shows uniformity.
• By areal linkage:
  • Nodal region: one dominant urban centre around which smaller urban and rural places develop.
  • Axial region: a region strung along a corridor, performing a special function, such as an industrial corridor along a freight line or expressway.
  • Ad hoc region: a transitional region, usually backward, drawn for a specific purpose and not on a permanent basis.

Denoted and Vernacular Regions Compared

• Denoted regions are made by scholars and planners through deliberate regionalisation; vernacular regions emerge from the collective identity of the people who live in them.
• Denoted regions apply objective criteria and try for precise boundaries; vernacular regions are subjective and perceptual, with ill-defined or no boundaries.
• Denoted regions serve analysis, planning and policy; vernacular regions carry identity and historical memory.
• The drought-prone region is denoted; Mithila, Avadh and the American “South” are vernacular. The distinction maps onto the objective–subjective divide in regional geography.

Naïve, Instituted and Denoted Regions

• Naïve regions are mental constructs: subjective, loosely bounded and vaguely identified.
  • They lack a well-structured association of region-building elements. The backward region of policy talk, before any index defines it, is one example.
  • Cultural regions such as Mithila and Avadh are naïve in this sense: identifiable and observable, but never confined within a line. Their names often come from outsiders.
  • Metaphysical regions are the extreme sub-type, with no spatial referent: heaven and hell, or the Marxist utopian society.
• Instituted regions are created by an authority to administer an activity: national, State and local governments, religious bodies, firms.
  • They have clearly demarcated boundaries on paper, quantifiable criteria and often legal sanction. Systems of instituted regions are hierarchical: State, district, sub-division, block.
• Denoted regions are created by scholars to reduce the complexity of the world so it can be understood; they are also called pedagogical regions.
  • Making them is exactly analogous to classification: places are grouped because they share something. Such regions have no independent existence outside the analyst’s purpose.
  • They are of two kinds, uniform (formal) and nodal (functional). When used for development decisions they become planning regions.

Single-Feature, Multiple-Feature and Compage Regions

• Derwent Whittlesey, who saw a region as a differentiated segment of the earth’s surface, gave a three-part classification of formal regions that rests on how many elements define the region:

• The compage is the most holistic formal region: not mere physical uniformity but the total human–environment complex seen as one functional whole. Its meaning and significance are discussed with the concept of region.
• An older classical typology runs from single-aspect and multiple-aspect regions through regions of totality (the whole complex of an area) to functional regions.

Formal, Functional, Vernacular and Planning Regions

Formal (Uniform or Homogeneous) Region

• A formal region is homogeneous with respect to selected criteria. It is identified by its composition, the assemblage of phenomena it contains.
• The defining characteristic may be predominant rather than universal.
  • The Wheat Belt of North America grows other crops too; wheat merely dominates. A formal region is more homogeneous in the chosen criterion than the areas around it, not perfectly uniform.
• Criteria:
  • Physical: relief, climate, vegetation, soil. Savanna, tropical rainforest, Thar Desert, black soil region.
  • Economic: occupational structure, per capita income, unemployment, industrial structure, net migration, density. Industrial and agricultural regions.
  • Cultural: language, religion, ethnicity, political allegiance. Central India tribal belt, Hindi-speaking belt.
  • Composite: several indicators combined, more realistic but needing careful choice of variables. The BIMARU States, backward regions, human development regions.
• Characteristics:
  • Relatively static: a region defined by soil or relief does not change season to season.
  • No dominant node: homogeneity extends throughout.
  • Transitional boundaries: the semi-arid zone merges into the arid zone gradually.
  • Problem-bound: internal similarity means shared problems, which makes the formal region a natural unit for problem-area programmes.
• Homogeneous on one criterion, heterogeneous on others: Scotland and Uttar Pradesh are clear-cut regions in administrative terms, yet Uttar Pradesh’s hill and plains districts once had little in common in relief. What matters is uniformity in the chosen criterion.

Natural Regions

• A natural region is a formal region defined by physical criteria: relief, climate, soil and vegetation acting together.
  • Andrew John Herbertson (1905) divided the world into major natural regions, types such as equatorial, savanna, monsoon, hot desert, Mediterranean, humid subtropical, oceanic, humid continental, alpine, polar and tundra lands that recur on several continents in similar latitudinal and coastal positions.
• Natural regions are relatively permanent and cut across political boundaries. They are drawn for understanding, not for administration, and have no authority to plan.
• India’s major physiographic formal regions:

Functional (Nodal, Polarised or Heterogeneous) Region

• A functional region shows functional coherence, the interdependence of parts. It is made of heterogeneous units, towns, cities and villages, that work together as a system.
• Places in it belong together not because they are alike but because they are tied to the same centre by the movement of people, goods, money and ideas. Each interacts more with this node than with any other.
• Flows that define it:

• The node is the core that connects all activities and unifies the region. Nodes are usually urban centres.
  • Mumbai draws migrants from Uttar Pradesh and Bihar because it offers jobs. Better transport widens the hinterland, which in turn strengthens the node.
• Distance decay: interaction weakens with distance from the node. A newspaper’s readership thins out with distance from its city of publication, until a rival centre takes over. Distance weakens links of every type; the main exception is the link of all areas with the national capital.
• Characteristics:
  • Dynamic: boundaries shift with the intensity of flows; a growing city’s region expands.
  • Heterogeneous inside: dense core, suburbs, peri-urban belt and villages, united by function.
  • Many possible sets: the region for vegetables is small, for automobiles large. Each function has its own range, giving a hierarchy of nodal regions.
  • An element of homogeneity: all its parts share dependence on one centre.
  • Functional links arise because no settlement can support every function. A college, a hospital or a bank branch needs a threshold population, so smaller places depend on larger ones.
• Kinds of functional region:

• Polarised region: Boudeville’s term for the functional region. It stresses the dominance of the centre, linking the type to growth pole theory.
• The extent of a city’s functional region is studied as its sphere of urban influence or umland; Robert E. Dickinson’s city region (1947) is its largest form.
• Major functional regions of India:
  • Delhi NCR: Delhi as the undisputed node; daily commuters from Gurugram, Noida, Ghaziabad and Faridabad; milk, vegetables and newspapers flowing in and out; the region now extends over parts of Haryana, Uttar Pradesh and Rajasthan.
  • Mumbai Metropolitan Region: the financial capital as node; suburban rail commuting from Thane, Navi Mumbai and Raigad; port hinterland reaching far inland; a national film and media sphere.
  • Bengaluru Metropolitan Region: an IT and services node drawing skilled labour from Keralam, Andhra Pradesh and Tamil Nadu, with a fast-expanding real-estate hinterland.
  • Damodar Valley: coal, steel and power as organising functions; coal from Jharia and Raniganj to thermal stations; steel from Bokaro and Burnpur to downstream users.

Complementary Region (Christaller)

• In Walter Christaller’s central place theory (1933), the complementary region (Ergänzungsgebiet) is the area a central place serves and depends on in return. It is also called the tributary, service or market area.
  • The centre supplies goods and services; the region supplies customers, produce and labour. Each completes the other.
  • It is a functional region in pure form, defined by the range of goods and services and supported by their threshold population.
• On an isotropic plain the ideal complementary region is a circle. Circles leave gaps or overlap, so the packed form is a hexagon.
• Types of complementary region by order:
  • Each order of central place has its own complementary region: from the small region of a market hamlet through those of a township, county seat, district city and small State capital to the region of a provincial head place.
  • A higher-order region contains several lower-order regions, giving a nested hierarchy of service areas.
• Types by organising principle (K-value):

• Significance: it links the hierarchy of settlements to a hierarchy of regions. Planners use it to space service centres so that each serves a viable population, as in R. P. Misra’s growth foci and village-cluster planning.
• Complementary region and other regions:
  • It is the theoretical, ideal form of the functional region: equal-sized, non-overlapping and nested on a uniform plain.
  • Real spheres of influence are irregular, overlap at their edges and stretch along transport routes, because the plain is not isotropic and centres differ in attraction.
  • August Lösch let market areas of different sizes overlap and rotate around a metropolis, giving sectors rich and poor in centres, closer to real complementary regions.
• Indian illustration: the periodic haat serves a cluster of villages for low-order goods; the block town serves several haat areas for banking and secondary schooling; the district headquarters serves all of them for hospitals, courts and wholesale trade. Each tier’s service area is a complementary region nested inside the next.

Vernacular (Perceptual) Region

• A vernacular region is one that people believe exists as part of their cultural identity. Its inhabitants feel connected by a shared history, interests and identity.
• Such regions are mental maps, a shorthand for identifying places and people. They reflect a sense of place and rarely match official boundaries.
  • Wilbur Zelinsky (1980) mapped North America’s vernacular regions from regional names, such as “Dixie” or “Midwest”, in the business listings of telephone directories for 276 metropolitan areas, and found fourteen popular regions.
  • Peter Gould and Rodney White’s Mental Maps (1974) showed how people’s spatial preferences form perceptual regions.
• Characteristics:
  • Subjective: they vary from person to person and group to group.
  • Fuzzy, overlapping boundaries with a strong core and a weak periphery.
  • No administrative function, though they may later be formalised.
  • Rooted in language, history, ecology and stereotype.
• Ad hoc regions are related but transitional: areas identified for a specific planning purpose, usually backward, and not created permanently. A perceived region can be formalised into a planning region when policy acts on it, as Bundelkhand was.

Planning (Programming) Region

• A planning region is an area where a development plan can be designed and carried out to tackle regional problems.
  • Boudeville: an area displaying coherence or unity of economic decisions.
  • Leo H. Klaassen (1965): it must be large enough for investment decisions of an economic size, able to supply its own industry with labour, homogeneous in economic structure, with at least one growth point and a common awareness of its problems.
• It may be formal, functional or both, and is often transitional. Formal and functional regions rarely coincide, so the planning region is carved out as a compromise that is also administratively viable.
• Criteria (after C. R. Pathak and Amitabh Kundu):
  • large enough for a range of resources and economic viability, yet small enough to keep its uniqueness and be planned effectively;
  • large enough for substantial changes in the distribution of population and employment to take place within it;
  • a fairly homogeneous economic, topographic and socio-cultural structure, as in the KBK region of Odisha;
  • a balance of homogeneity, nodality and administrative convergence;
  • internal cohesion, contiguity and narrow internal disparity;
  • a viable resource and manpower base, with satisfactory production, exchange and consumption;
  • one or more growth points to regulate flows;
  • scope for people’s participation and a data unit for plan formulation.
  • How such criteria are measured belongs to the methods of regionalisation.
• In practice administrative regions serve as planning regions because they have data and machinery, even when economic regions cut across them.
• Kinds of planning region:

• Characteristics: arranged in a hierarchy (macro, meso, micro); defined to translate national objectives into regional programmes; rarely as small as a single village unless the aim is narrow.
• Ad hoc problem regions change: the Left Wing Extremism-affected region, once served by the Integrated Action Plan and the aspirational districts programme, fell from 126 districts (2014) through 90 (2018) to none classed as affected by mid-2026; 37 “legacy and thrust” districts and one “district of concern” still receive security and development support (Ministry of Home Affairs, July 2026).
• How India’s planning regions are arranged, from macro-regions to districts and blocks, is the subject of planning regions of India.
• Important planning regions of India:
  • KBK region (undivided Kalahandi, Balangir and Koraput districts of Odisha): composite backwardness, hunger, tribal deprivation, out-migration and deforestation, tackled by a special area plan.
  • Bundelkhand (Madhya Pradesh and Uttar Pradesh): drought, water scarcity and historical marginality; a special package from 2009.
  • North-East: eight States treated as a special planning region with the North Eastern Council and the Ministry of Development of North Eastern Region, special category assistance, North-East industrial policy and frontier concerns.
  • Command areas of Nagarjunasagar, Hirakud and Bhakra: formal planning regions defined by a dam’s irrigation reach.

Political, Administrative and Cultural Regions

• Administrative and political regions are instituted regions: States, districts, blocks, constituencies, police and revenue circles. They have precise legal boundaries and are the units for which data are collected.
• Cultural regions rest on language, religion, customs and historical memory. Culture cannot be defined precisely, and its elements contradict one another within one area, so cultural regions always have vague, transitional boundaries.
  • Buddhist cultural zones in the Himalaya merge gradually into neighbouring traditions. World cultural realms and India’s cultural regions are treated in cultural regions of the world and cultural regions of India.
• Economic regions at world scale are often formal regions on one criterion. The World Bank’s income groups (FY2027, July 2026) use gross national income per head: low (≤ $1,175), lower-middle, upper-middle and high (> $14,375).

The Formal–Functional Continuum

• Formal and functional regions rarely overlap neatly and often differ widely. A planning region is “carved out” by compromising the two, and must be administratively viable.
• Every practical planning region therefore contains homogeneous zones (formal) and functional links to a node or corridor.

Regions by Development Level and Activity

Developed, Backward and Intermediate Regions

• Developed regions have a high rate of growth in goods and services and a large share of national output.
  • This may come with or without rich resources, but always with advanced technology, skilled people and abundant infrastructure, a self-reinforcing “success breeds success” dynamic.
  • They may become overdeveloped: congestion, high infrastructure costs and pollution turn agglomeration into diseconomies.
  • A developed region is the counterpart of the backward region, and it is here that François Perroux’s growth pole can become overcritical.
  • Their rise may reflect comparative advantage or the diversion of public funds to influential areas.
• Backward (depressed) regions have a largely subsistence economy beside modern sectors and have not escaped the low-level equilibrium trap.
  • Poor infrastructure, harsh geo-climate, low investment, fast population growth and low urbanisation are both causes and consequences.
  • Major industrial centres are absent or distant; per capita income and productive employment lag.
  • Vestigial regions are a sub-type: traditional communities, such as some tribal groups, living near subsistence with far lower incomes than their neighbours.
  • Backwardness is multi-causal and partial: a region may lag in some respects and not in others, and may be backward with or without high population density.
• Intermediate (neutral) regions lie between, “islands of development around a sea of stagnation”, with modest or stagnant growth and pockets of development amid underdeveloped surroundings. They are often in transition: investment can lift them, neglect can push them back.

• Such regions are identified by composite indices, and their widening gaps are the theme of regional imbalances.

Regions by Dominant Activity

Hierarchy of Regions

• Regions nest in a hierarchy from the nation to the village. Each level has its own functions, data, planning agency and links to the levels above and below.

• Macro region: larger than or equal to a State, and may cut across State boundaries for large projects such as river valleys and power grids.
  • It may be complementary in resources yet heterogeneous in administration, with a common resource base suited to specialisation.
  • Scholars have divided India into 11 to 20 macro regions on agro-climatic or resource criteria.
  • The five Zonal Councils (Northern, Central, Eastern, Western, Southern) set up under the States Reorganisation Act, 1956, and the North Eastern Council (1971) are India’s main inter-State forums; they consult, not plan.
• Meso region: a division of a State, several districts with some affinity. It may be a cultural, administrative or physical region, and becomes nodal where its micro regions develop in complementary ways.
  • Chhattisgarh plain, Bundelkhand, Baghelkhand and Mahakoshal are examples. The NSS regions, groups of contiguous districts within a State with similar agro-climatic and population features, are statistical meso regions. Older accounts count 58; they were never mapped as formal planning regions, and their number has changed in later rounds.
• Micro region (district): the lowest territorial unit with both a data base and compact administration, so the most viable unit for plan formulation and monitoring.
  • A metropolitan area may be one micro region and its area of influence another; mineral belts and irrigation commands are special micro regions.
  • The Working Group on District Planning chaired by C. H. Hanumantha Rao (1984) made the district the fulcrum of decentralised planning; the 74th Amendment (1992) gave it the District Planning Committee.
• Micro-minor region (block and Panchayat): the unit of grassroots planning.
  • The Working Group on Block-Level Planning chaired by M. L. Dantwala (1978) made the block the link between village and district planning.
  • Block officers deal more with implementation than with formulating plans; the block plan joins the national plan through the district and State plans.
  • Its tasks: account for local resources and find prime moving activities, such as dairying, fisheries, poultry, soil conservation, cropping-pattern change, agro-industries and watershed development, to meet basic needs. The goal is the ruralisation of industries: production by the masses, for the masses and near the masses.
  • The 73rd Amendment (1992) made the Gram Panchayat the lowest planning unit; the test of such planning is that people need not look to the centre for it. These levels are worked out in multi-level planning.