Mobility Transition Model by Wilbur Zelinsky

Wilbur Zelinsky propounded the mobility transition model of migration in 1971. He analyzed the migration behavior of people in correspondence with Demographic Transition Model. Previous models like Ravenstein’s Laws, Lee’s Intervening Obstacles and Stouffer’s Intervening Opportunities etc. only analyzed process of migration as a result of constant pull and push between places. Whereas, Zelinsky’s model … Read more

Demographic Transition Theory of Population Growth

Human population growth is dependent on many social, economic and political factors. Warren Thompson (1929) and Frank Notestein (1945) proposed Demographic Transition Model after studying these factors and their effect on population growth in Europe, Australia and North America. Basic Idea behind Demographic Transition Theory Basically, demographic transition model explains the trajectory of population growth … Read more

Relevance and Criticism of Von Thunen Model

Criticism of Von Thunen Model is based on its unidimensional character which is based in a medieval European setting. In Europe, the cropping intensity declines away from North-Western Europe. Similarly, the land-use zones are elongated along the cross-continental railways. The cropping intensity declines as one moves away from these modes of rapid transport. Due to … Read more

Von Thunen Model of Land Use and Rent

Von Thunen Model of land use and rent was given by J.H. Von Thunen, a German. He observed and analyzed the receipts of rent and distribution of agricultural activities in and around his estate in Rostok, Maclenburg, Germany and came to propose his model to determine the land-use around a city. Basic Idea of Von … Read more

Theory of Comparative Advantage of Trade

Theory of comparative advantage of trade explains that why different countries specializes in export of only fewer goods despite having all types resources. What is Trade? The exchange of goods and services between two or more parties is called trade. The trade is of two types i.e. Internal Trade and International Trade. The internal trade … Read more

Types of Topographical Sheets

Topographical Sheets Topographical sheets or topo sheets are large scale maps of land area of the world. Large scale means that smaller area is shown in detail on a piece of paper. Here, the representative fraction is small e.g. 1:25000. Small scale means that large area is shown on a piece of paper but it … Read more

Survey of India’s Topographical Sheets

Survey of India’s Topographical Sheets East India Company established Survey of India in 1767 for mapping, survey and exploration of resources in India. It publishes the topographical sheets in two series i.e. open series maps and defense series maps. Open Series Maps Survey of India prepares these sheets on 1:250000, 1:50000 and 1:25000 scale as … Read more

Example of Topographical Sheet

Topographical Sheet Example Topographical sheets are large scale maps and offers the spatial information in detail. These sheets are used for micro level planning and execution of civil and defense projects. Below is an example of topographical sheet. For Types and Uses of Topographical Sheets, Click Here. To Download More Topographical Sheet, Click Here.

Focused Group Discussion

Introduction to Focused Group discussion (FGD) Focused Group Discussions are conducted to derive the information from the discussion of a group of people. The person who is asking questions and regulating the content and direction of discussion is called a moderator. The person who is assisting the moderator and observing the group members during the … Read more

Sopher’s Index : Measures of Inequality

Measuring inequality is key to formation of policy for equitable distribution of benefits of economic growth to people. Sopher’s Index is a method which measures inter-personal inequality between people and regions. What is Sopher’s Index? It is used to calculate inter-personal disparity between two groups of people and regions. Need for Log scale: This index … Read more