India’s Urban Landscape | CBSE Class 8 Geography Notes

This note covers urban and rural settlements, population density, the growth of cities, economic and cultural activities, urban challenges, lake restoration, city planning, public spaces and sustainable development.

What distinguishes urban areas from rural areas?

Urban areas are towns and cities where people, businesses, occupations and government institutions are concentrated. They often have elaborate transport and communication systems. Elected local bodies are responsible for developing infrastructure, the facilities and systems that support daily life, and other amenities.

Rural areas consist of villages. They usually have smaller populations, close-knit communities and more agriculture-based occupations. They have fewer businesses and generally less elaborate transport and communication systems than cities. Gram panchayats, the local governing bodies of villages, govern these areas.

How do their features compare?

The exact definitions of cities, villages, urban areas and rural areas differ across the world. For example, the population thresholds given for becoming urban are more than 220 in Denmark, 50,000 in Japan and 5,000 in India. A single worldwide population threshold cannot explain every country's classification.

India's urban history includes the Harappan cities of Dholavira, Kalibangan and Rakhigarhi, as well as historical cities such as Vijayanagara, Varanasi and Ujjain. Most of the historical cities are still flourishing today. Present-day urban growth therefore develops alongside a rich urban legacy.

A city is also more than its buildings. Its businesses, institutions, services and public spaces bring people into contact. Understanding an urban area requires attention to how people live and work there, as well as to its physical layout.

How do population density and urban population data help us understand cities?

Definition: Population density is the number of people living per unit of area, usually expressed as people per square kilometre. A demographer studies population characteristics such as size, age structure and geographical distribution.

Population density = total population of a region / area of the region in square kilometres. Here, the slash means division, and a square kilometre is the unit used to measure area. Population refers to the total number of people living in the region.

The distinction between population and density matters. A population count tells us how many people live in a place; density relates that number to the space they occupy. The same number of people feels more crowded when it occupies a smaller space.

What do the urban population figures show?

The United Nations estimates that 68 per cent of the world's population will live in cities by 2050, compared with the present figure of 55 per cent used here. A percentage expresses a share out of every hundred. India's urban share grew from 17 per cent in 1951 to around 40 per cent in 2025.

How should the city population chart be read?

The following figures are populations in crores, where one crore means ten million. They are population totals, not density figures. The city names and values belong to the 2025 comparison, so they should retain that date when used.

Blue vertical bars represent city populations. The vertical axis measures population in crores. Seoul and Kolkata have equal labelled values of 2.25, while Jakarta has the tallest bar, labelled 4.19.

See Fig. 7.4 in your NCERT textbook

How does urbanisation turn villages into larger urban centres?

Urbanisation is the shift of population from rural to urban areas, with a corresponding decrease in the proportion living in rural areas. Areas and regions undergo a gradual transition from villages to small towns and then to bustling large cities.

A proportion is a share of a total. Urbanisation concerns the changing urban and rural shares, as well as the growth of settlements. It involves changes in occupations, services, buildings and transport alongside the movement and concentration of people.

What sequence links changing work with urban growth?

1. Rural origins: Farm-related work forms the starting point in the process.
2. Early urbanisation: Work shifts towards the secondary sector, which includes manufacturing, and the tertiary sector, which includes services such as transport. Small towns and trading centres emerge.
3. Population growth: These centres attract people from other areas. New infrastructure develops, including factories, hotels, government institutions, banks, entertainment and sports facilities.
4. Diverse jobs and expansion: Work includes driving an auto, writing, music, architecture and security services. Cities expand into metropolitan areas, large urban areas with extensive buildings and transport networks.

Arrows connect a rural scene with a small settlement and a city skyline. Labels show farm-related work, early urbanisation, population growth, new infrastructure and varied jobs. The metropolitan stage includes high-rise buildings, shopping malls, a metro and busy transport networks.

See Fig. 7.6 in your NCERT textbook

Location often helps this process. Rivers provided transport routes; crossroads of trade routes supported markets. Access to agricultural produce and raw materials helped artisan communities, whose members make skilled craft products, and manufacturing develop. Such places also became centres of political and administrative power.

Over time, cities can become crowded and expensive. Yet the concentration of diverse resources gives them social and economic value. Urban growth therefore needs to be understood through both the opportunities it creates and the pressures it brings.

How do industries and business clusters encourage city growth?

Case study: How did Sakchi become Jamshedpur?

Sakchi was a village in the Chota Nagpur Plateau. Its closeness to rich iron ore deposits, natural concentrations of the material used to make iron, led to its selection as the site of Asia's first steel plant. Industry provided the starting point for its urban growth.

The Tata family aimed to develop a township with modern facilities for factory personnel. Sir Dorabji Tata built a hospital before steel production began. Sakchi grew into a city and was renamed Jamshedpur in 1919. It is now the largest industrial city in Jharkhand.

Its design included wide, tree-lined streets, gardens, open spaces, houses and civic amenities, meaning facilities serving residents. Planned development was followed by more factories in the region. Work opportunities attracted people from within and outside the state, linking industrial growth with population movement.

How do technology clusters work?

A business cluster is a grouping of specialised businesses or industries. Bengaluru became an information technology, or IT, hub through the concentration of software firms, newly established businesses called start-ups, and higher education institutions. A hub is a centre of related activity.

Connections between industries and educational institutions encouraged innovation, meaning the development of new ideas, products or services. Advanced technologies, including artificial intelligence, which enables computer systems to perform tasks involving intelligence, supported new products and services. Hyderabad similarly grew into a major centre for technology-based enterprises.

What roles do smaller urban centres play?

Other rapidly growing cities, including Kochi, Indore, Lucknow and Nagpur, attract companies because operating costs are lower than in larger cities. Companies establish warehouses and offices there while serving customers across India and globally. Urban economic activity is therefore spread across cities of different sizes.

How do trade, administration and tourism shape cities?

How did Mumbai develop diverse activities?

Places near coasts, rivers or important trade routes tend to become economic hubs. Mumbai's location along the Arabian Sea and Kolkata's nearness to the eastern coast made them vital port cities, urban centres connected with the movement of goods by sea, for domestic and international trade.

The Bombay Stock Exchange, an institution for trading shares, was established in 1875. Mumbai became the nation's financial capital. Expanding trade brought together talent from different sections of society. The exchange of information and ideas encouraged innovation.

Mumbai's film industry began in the 1910s and was flourishing by the 1930s. Its modern physical infrastructure now supports varied economic activities. Transport connections, businesses and the exchange of ideas together help explain why its economy extends beyond its original port activities.

How did Delhi's administrative role support expansion?

Delhi has been a centre of culture, trade and administration since the Iron Age, a historical period associated with the use of iron. Rajputs, Turks and Mughals built forts, roads and markets. The British built a new capital and introduced railways and electricity.

After Independence, New Delhi became the capital of the Indian Republic. Ministries, industries, universities and research centres attracted people seeking jobs and education. Population growth put pressure on housing, water supply and sewerage, the system for carrying away sewage or wastewater.

The National Capital Region (NCR) brought Delhi into a wider regional arrangement including NOIDA, expanded as New Okhla Industrial Development Authority, and Ghaziabad. This helped ease pressure. Roads, highways and the metro supported regional expansion.

Since the 1990s, Gurugram has become an IT and Business Process Outsourcing (BPO) hub. BPO means hiring another service provider to perform particular business functions. It reduces costs for the hiring company and can provide expert professionals, while attracting companies and development to the region.

How do visitors support livelihoods?

Agra's Taj Mahal attracts 70 to 80 lakh visitors annually; a lakh means one hundred thousand. Amritsar and Varanasi attract pilgrims, people travelling to sacred places. Their visits support transport, hospitality, local food vending and handicrafts. Hospitality includes services that accommodate and serve visitors.

How do cities become centres of culture and social interaction?

Cities draw people from different regions. Their languages, customs, traditions, foods and festivals meet in shared spaces. This makes cities cultural hubs, centres where cultural practices are shared and developed through people's contact with one another.

Mumbai's vada pav illustrates this mixing. It combines a Maharashtrian-style potato dumpling with bread. The bread and potatoes are Portuguese contributions. The snack became popular among textile mill workers because it was easy to make, carry and eat.

How do institutions and festivals bring people together?

Kolkata was once the capital of British-ruled India. Institutions such as the Indian Museum and Victoria Memorial remain from that period. The city is also famous for Durga Puja, a five-day festival held every autumn, linking urban life with shared celebration.

Kolkata's Durga Puja entered the United Nations Educational, Scientific and Cultural Organization's list of Intangible Cultural Heritage of Humanity in 2021. Intangible heritage means cultural practices and traditions rather than physical buildings. The organisation is commonly abbreviated as UNESCO.

Cities devote resources to cultural centres, libraries, museums and sports stadiums. These facilities enrich social and cultural life. Spaces for national and international gatherings also allow people to share knowledge and ideas, encounter new experiences, build relationships and form networks.

Shared spaces therefore have a role beyond movement or trade. They help people interact. City life brings together work, cultural expression and community relationships, and good planning needs to consider these connections alongside roads, housing and other physical facilities.

What pressures do growing cities place on people and resources?

Large numbers of people arriving in cities increase demand for food, water, energy and housing. This puts pressure on resources and infrastructure. Rapid growth of unplanned residential areas, neighbourhoods developed without adequate planning, can leave residents with poor access to essential services.

Problems include narrow or poorly maintained roads, more vehicles, waste, pollution and reduced green spaces. Heat islands are urban areas with higher temperatures. Water scarcity, meaning insufficient available water, and flooding during the monsoon season are also urban challenges.

What does the Air Quality Index indicate?

The Air Quality Index (AQI) combines information about different air pollutants into a numerical value reporting air quality. A higher value means greater pollution and a greater risk to public health. Pollutants are substances that contaminate the environment.

The NCR frequently records AQI levels over 400, far above the safe limit of 50 used in this comparison. The index makes a complex pollution problem easier to communicate, but it concerns air quality, not the total number of people living in the region.

Urban areas often experience higher crime rates than rural regions because of higher population density and economic inequality, meaning unequal economic circumstances. This affects residents' safety and wellbeing and creates a need for greater policing and law enforcement.

Why do slums develop, and why do their residents matter?

Slums are overcrowded city settlements with poor housing and limited water, sanitation and other municipal services. Sanitation concerns the safe handling of human waste and conditions that protect cleanliness. Slums generally grow near city edges, railway tracks and industrial areas where vacant land is available.

They develop because affordable housing is insufficient for everyone migrating to cities. Slum dwellers often support city life through informal work, including vegetable vending, domestic help, laundry, construction and plumbing. Improving their housing, health and education infrastructure is a key challenge.

The Pradhan Mantri Aawaas Yojana provides affordable housing to economically weaker households. Housing improvement is one part of addressing urban disadvantage; the need for water, sanitation, health and education shows why planning must also consider services and residents' daily lives.

What does Bengaluru's lake restoration show about collective action?

Case study: Why did Bengaluru's water problems worsen?

Bengaluru faces summer water shortages and monsoon flooding because of poor urban planning. Excessive use of groundwater, water stored below the ground, lack of rainwater harvesting, meaning collecting rainwater for use, and encroachment on lake beds worsened the crisis. Encroachment means occupying or building into those spaces.

The city once had around 1,000 lakes, but rapid urbanisation reduced the number to about 200. Many remaining lakes were polluted by sewage and chemicals, and wells dried up. Lakes such as Bellandur and Varthur became covered in foam, released toxic gases and even caught fire.

How are communities helping?

Some efforts by non-profit organisations, Resident Welfare Associations (RWAs), which are associations of local residents, and communities are reviving lakes. Their work addresses the lake itself and the surrounding channels and vegetation, showing how several connected actions contribute to restoration.

• Desilting removes accumulated silt from the lake.
• Bunds, embankments that help retain water, are repaired using natural materials.
• Drainage channels are cleared to improve the movement of water.
• Native plant species, plants belonging naturally to the area, are planted.
• Fish are restocked in the lakes.

Photographs: Yelahanka Lake revival, Bengaluru (NCERT Class 8 Figure 7.19). The photograph labelled “Before development” shows much of the foreground covered with vegetation. The photograph labelled “After development” shows a broad open water surface, with trees and buildings in the background.

Such efforts can improve residents' quality of life by increasing water availability and maintaining the surrounding area's ecological balance, meaning the balance within the local natural environment. The case connects collective action, water management and better living conditions without implying that every problem has already been solved.

How can city planning respond to changing needs?

Definition: An urban planner plans and designs how land in towns and cities is used, aiming to improve infrastructure and residents' overall quality of life.

Cities need planning as dynamic systems, systems whose needs change over time. Planning must respond to population, jobs, travel requirements and climate change, meaning long-term changes in climate. Decisions about land use affect access to services as well as the appearance of the city.

Planners consider where homes, businesses, parks, schools, hospitals, libraries, sports facilities and community centres should be located. They also consider connected transport, safe streets for pedestrians and cyclists, and accessible fire and police stations. A pedestrian is a person travelling on foot.

How did Jaipur combine practical needs and design?

In 1727, Maharaja Sawai Jai Singh II appointed Vidyadhar Bhattacharya to design Jaipur. His expertise included vastu shastra and shilpa shastra, Indian traditions of architecture. He used a grid pattern, a layout of intersecting streets dividing the city into rectangular blocks called chowkris.

The plan considered east-west and north-south directions. It included wide streets, open spaces, gardens and nine public squares. These squares supported trade and interaction and contained important buildings and temples. A 20-foot wall with seven gates enclosed the city for security; feet are a unit of length.

Pink sandstone buildings along major streets gave Jaipur a uniform appearance and its identity as the Pink City. The design allowed sunlight, fresh air and steady water supply through reservoirs and canals. Shaded market porches provided comfort in the local dry climate.

The historical map shows straight streets intersecting within the city and dividing it into blocks. It also depicts surrounding areas. Use the street pattern to relate the map to Jaipur's planned rectangular layout.

See Fig. 7.22 in your NCERT textbook

How can a settlement map help explain planning?

On graph paper, draw a rough settlement map for 100 people. Let squares represent spaces such as residential neighbourhoods, parks, schools, factories and post offices. Distribute the 100 people among the spaces and label your choices.

This exercise connects land use, the purpose for which space is used, with the distribution of residents. Explain which areas are heavily populated and which are less populated. Give reasons for your allocation, considering how residential, commercial and industrial spaces fit together.

How do Singapore and Indian public spaces illustrate sustainable urban planning?

How does Singapore keep its plans flexible?

Singapore is a small island nation with over 8,000 people per square kilometre. It is often seen as a model of urban planning. Its Concept Plan, a plan for how land should be used, looks up to 40 years ahead.

Its Master Plan, a long-term document guiding future growth and development, is updated every 5 years to reflect changing infrastructure needs. From an overcrowded port in the 1960s, Singapore developed strong transport, electricity, water supply and waste management systems.

Mixed-use spaces place homes, offices and recreational facilities near one another. Singapore connects rail, buses, cycling paths and green walking corridors. These connections reduce reliance on cars, encourage walking and help make public spaces active and accessible.

High-rise buildings use limited land, while rooftop and vertical gardens, plants grown on upright surfaces such as walls, add greenery. These gardens reduce summer heat and support biodiversity, the variety of living things. Housing for senior citizens is linked with healthcare, childcare, green spaces and diverse neighbourhoods.

Singapore's community-centred design encourages interaction and social connections. It is considered one of the blue zone cities. Blue zones are places where people live significantly longer, healthier lives, often reaching 90 or even 100, with low rates of long-lasting illnesses. Okinawa in Japan is another example.

How can public spaces improve Indian cities?

Urban redevelopment, improving existing urban areas and facilities, can combine technology, citizen participation and better services. Ahmedabad's Sabarmati Riverfront includes promenades, which are spaces for walking, parks, markets and boating. The Atal Bridge connects the two sides of the river for pedestrians and cyclists.

Gangtok's Mahatma Gandhi Road is a pedestrian-only zone with shops, restaurants and hotels. It is known for cleanliness and a lively atmosphere. Such spaces show how planning can create opportunities for movement, meeting and enjoyment within the city.

Information and Communication Technology (ICT) uses technology to handle and communicate information. Intelligent traffic systems, digital surveillance, online complaint-resolution platforms and solar-powered public spaces can make urban life more convenient and sustainable. Solar-powered facilities use energy from sunlight.

Sustainability means balancing growth with care for people and nature without exhausting resources. Cities need opportunities that include vulnerable people, efficient services and green spaces. Their challenges also affect connected rural areas, so responsible urban development has consequences beyond city boundaries.

Glossary

• Urban area — A town or city concentrating people, varied occupations, businesses and government institutions.
• Rural area — A village area usually having lower population and more agriculture-based occupations.
• Population density — The number of people living per unit of area, usually per square kilometre.
• Demographer — A person studying population characteristics, including size, age structure and geographical distribution.
• Urbanisation — Population shift from rural to urban areas, accompanied by a decreasing rural population share.
• Infrastructure — Facilities and systems supporting life and activity, including transport, water supply and electricity.
• Business Process Outsourcing — Hiring another service provider to perform specific functions or processes of a business.
• Air Quality Index — A numerical scale combining information about pollutants to report air quality and related health risk.
• Slum — An overcrowded urban settlement with poor housing and limited water, sanitation and municipal services.
• Urban planner — A person designing urban land use to improve infrastructure and residents' quality of life.
• Master Plan — A long-term planning document providing a layout to guide future growth and development.
• Vertical garden — A garden with plants grown on vertical surfaces instead of on the ground.
• Mixed-use space — An area where homes, offices and recreational facilities exist near one another.
• Sustainable city — A city balancing growth with care for people and nature without exhausting resources.

Common errors and misconceptions

• Misconception: Every country uses the same population threshold for urban areas. Correct: Urban and rural definitions differ across countries; Denmark, Japan and India have different population thresholds in the comparison.
• Misconception: Population and population density mean the same thing. Correct: Population is a count of people; density relates that count to the area in which they live.
• Misconception: Urbanisation refers only to the construction of buildings. Correct: It includes population shift from rural to urban areas and a corresponding fall in the rural population share.
• Misconception: All economically important cities are large metropolises. Correct: Smaller centres specialise in activities such as brass work, textiles, wooden toys and silk sarees.
• Misconception: Slum residents make no contribution to city life. Correct: They often support cities through vegetable vending, domestic help, construction, laundry services and plumbing.
• Misconception: Bengaluru's lake count fell from exactly 1,000 to exactly 200. Correct: The figures are around 1,000 and about 200, so their approximate character must be retained.
• Misconception: Singapore's Master Plan is updated every 40 years. Correct: Its Concept Plan looks up to 40 years ahead, while the Master Plan is updated every 5 years.
• Misconception: Restoring lakes guarantees that all water problems disappear. Correct: Restoration efforts can improve water availability and ecological balance; this does not establish that all problems are solved.

Exam-style questions with model answers

Q1. Population density means population divided by area. A city population chart gives New Delhi's population as 3.02 crore in 2025 but gives no area. State what this figure tells you and why density cannot be calculated from it alone. [2 marks]

1. The figure gives the total population of New Delhi in the 2025 comparison, expressed in crores.
2. Density requires division by the city's area, which is missing, so the population total alone is insufficient.

Q2. India's urban population share was 17 per cent in 1951 and around 40 per cent in 2025. State the direction of change and explain how precisely the 2025 figure should be reported. [2 marks]

1. The share of India's population living in urban areas increased between the two dates given.
2. The 2025 figure should remain “around 40 per cent”, because the supplied value is approximate rather than exact.

Q3. Sakchi was chosen for a steel plant because it was near rich iron ore deposits. The Tata family provided township facilities, including a hospital built before steel production began. More factories later attracted workers. Explain three links between resources, services and urban growth in this case. [3 marks]

1. Nearby iron ore deposits gave the steel plant access to an important raw material, linking industrial location to natural resources.
2. Township facilities, including the hospital built before production, supported the people who would work in the factory and live nearby.
3. Further factory development created work opportunities and attracted workers, connecting industrial expansion with the growth of the settlement's population.

Q4. Bengaluru's water crisis involved overuse of groundwater, lack of rainwater harvesting and occupation of lake beds. Communities are desilting lakes, repairing bunds (embankments) with natural materials, clearing drainage channels, planting native species and restocking fish. Desilting means removing accumulated silt. Identify three measures from this account and explain the part of restoration each addresses. [3 marks]

1. Desilting addresses the build-up of silt within lakes by removing accumulated material as part of restoring the water body.
2. Repairing bunds with natural materials addresses the embankments around the lake, while retaining the restoration project's use of natural materials.
3. Clearing drainage channels addresses the channels through which water moves, forming another part of the communities' work to revive the lakes.

Q5. Jaipur's plan used rectangular blocks, wide streets, nine public squares, a 20-foot wall with seven gates, reservoirs and canals for steady water supply, and shaded market porches for comfort in the local dry climate. The squares supported trade and interaction, while the wall and gates provided security. Using these details, explain five ways the plan addressed urban needs. [5 marks]

1. Rectangular blocks and wide streets organised the city's layout, providing a planned arrangement of streets and blocks across the built-up area.
2. The nine public squares provided centres for trade and interaction, connecting the city's economic activities with places where people could meet.
3. The enclosing 20-foot wall and seven gates addressed security, making protection a deliberate element of the overall city design.
4. Reservoirs and canals provided a steady water supply, responding to the need for water in the city's local dry climate.
5. Shaded market porches improved comfort for traders and travellers, showing attention to the daily experience of people using commercial spaces.

Q6. Singapore's Concept Plan looks up to 40 years ahead, and its Master Plan is updated every 5 years. Homes, offices and recreation are located nearby; rail, buses, cycling paths and walking corridors are connected; rooftop and vertical gardens on buildings use the limited land, reduce heat during summer and support biodiversity. Transport connections reduce reliance on cars, encourage walking and create active public places. Explain five benefits of these planning features. [5 marks]

1. The Concept Plan provides a long view of land use, allowing the city to consider its future development up to 40 years ahead.
2. Updating the Master Plan every 5 years enables planning to reflect changing infrastructure needs, keeping it flexible as the city develops.
3. Mixed-use spaces bring homes, workplaces and recreation near one another, combining different aspects of daily life within nearby urban spaces.
4. Connected rail, buses, cycling routes and walking corridors reduce reliance on cars, encourage walking and help create active public places.
5. Rooftop and vertical gardens add greenery to buildings, reduce heat during summer and support biodiversity while the city uses its limited land.

Q7. Slums have overcrowded, poor housing and limited water, sanitation and municipal services. They develop because affordable housing is insufficient for everyone arriving in cities. Residents often provide vegetable vending, domestic help, construction and plumbing. Explain three conclusions about housing, services and residents' role. [3 marks]

1. The shortage of affordable housing helps explain why people arriving in cities live in overcrowded settlements with poor housing conditions.
2. Improvement must address water, sanitation and other municipal services as well as housing, because the supplied account identifies several connected shortages.
3. Residents contribute to urban life through vending, domestic help, construction and plumbing, so their work forms part of the city's everyday functioning.

Q8. Urban areas often have elaborate transport and communication systems, while rural areas generally have less elaborate systems. Urban areas also often experience higher crime rates than rural regions. Explain why each statement must retain its qualifying word. [2 marks]

1. “Often” and “generally” describe usual patterns in transport and communication, without asserting that every settlement follows them.
2. “Often” describes the crime-rate comparison as a tendency, so it should not become a claim about every urban area.

Key takeaways

• Urban areas concentrate people, businesses, occupations and institutions, while rural areas usually have more agriculture-based work.
• Population density relates the number of people to area; population totals alone cannot establish it.
• Urbanisation combines rural-to-urban population movement with changes in work, infrastructure, settlement size and population shares.
• Resources, trade routes, business clusters, administration, tourism and pilgrimage can support different paths of city growth.
• Cities bring cultures together through shared foods, festivals, institutions and public spaces for interaction.
• Housing shortages, pollution, congestion, water stress and loss of green spaces make urban planning necessary.
• Bengaluru's lake revival efforts show how community action can improve water availability and ecological balance.
• Sustainable planning combines flexible land use, accessible services, public transport, greenery and care for vulnerable residents.

Test yourself

What distinguishes population density from total population?

Population is the number of residents; density is that number divided by the area they occupy.

What does urbanisation mean?

It means a population shift from rural to urban areas and a corresponding decrease in the rural population share.

Why was Sakchi chosen for the steel plant?

It was near rich iron ore deposits in the Chota Nagpur Plateau.

How can pilgrimage support an urban economy?

Pilgrims support transport, hospitality, food vending and handicrafts, providing livelihoods for people in the city.

What does a higher Air Quality Index mean?

It means greater air pollution and a greater risk to public health.

Which approximate lake counts describe Bengaluru's decline?

The number fell from around 1,000 lakes to about 200 as rapid urbanisation occurred.

How did Jaipur's markets respond to the local climate?

Markets had shaded porches that improved comfort for traders and travellers in the dry climate.

How do Singapore's Concept Plan and Master Plan differ in timing?

The Concept Plan looks up to 40 years ahead; the Master Plan is updated every 5 years.