Kulwinder Singh Nicholas John Spykman envisioned the Rimland theory of geopolitics in 1942 in his book ‘America’s Strategy in World Politics’. Later In 1944, his book titled ‘The Geography of Peace’ was published, posthumously. This book provides a more elaborate description of Spykman’s Rimland Theory. Spykman’s work emerged as a critique of Mackinder’s Heartland Theory which envisages … Read more
Sir Halford Mackinder was a pioneer political geographer who formulated Heartland Theory to demonstrate the importance of strategic location of powerful nations in determining balance of global power. Mackinder’s heartland theory was first published in 1919 in a book titled ‘Democratic Ideals and Reality’ and modified it slightly in 1943. However, the basic idea of … Read more
Soil refers to the top layer of the continental crust which supports the growth of plants, trees and crops. This layer is formed by weathering of larger rocks into finer fragments. India has a diverse range of climatic conditions and geological history. These two factors lead to formation of different types of soil in India. … Read more
In common parlance, transport is defined as the movement of tangible goods and people from one place to another. However, there are various aspects of transportations such as time, space, cost, effort, reach, velocity etc. Since, the concept of space and place is closely connected to transportation, it becomes a subject matter of geographical analysis. … Read more
A. H. Thiessen proposed thiessen polygon method to show the area of influence of corresponding weather stations in a given area. However, various fields of sciences and social sciences use this technique of regionalisation for research purposes. It is based on division of a given area into polygons of different sizes and shapes. In fact, … Read more
There are two archipelagoes under the sovereignty of India i.e. Andaman & Nicobar and Lakshadweep. Archipelagoes refers to a group of islands. These islands of India are located in the India ocean. These island are very important economically, environmentally and strategically. A student of geography should know about the process of formation of these islands … Read more
Northern plains of India or Indo-Gangetic plains form the second largest physiological division of India with an approximate area of 21 percent of the total geographic area of India. The Ganga, Indus and Brahmaputra flow through these plains and provide plenty of water for irrigation. Hence it is, agriculturally, the most fertile land in India … Read more
India is a physiologically diverse country. There are five physiological divisions of India i.e. Indo-Gangetic Plains, Plateau, Mountain Ranges, Coastal Plains and Islands. The mountain ranges in India form the third largest physiological unit of India. These mountain ranges were formed during different periods of geological history in different places. Therefore, their altitude, rock structure, … Read more
Grasslands are the large continuous regions having different types of grasses with either no trees or negligible presence of trees. These grasslands of the world are one of the largest biomes of the world. Steppe is the largest grassland in the world. Types of Grasslands There are two types of grasslands i.e. temperate grasslands and … Read more
In Remote Sensing, the image resolution refers to the amount of information available in a satellite imagery. There is four types of resolution in satellite imageries i.e. Spatial, Spectral, Radiometric and Temporal resolutions. These four types of resolution in remote sensing determine the amount and quality of information in an imagery. 1. Spatial Resolution Spatial … Read more