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solar sensors can only capture data during daylight hours. Active sensors are different from passive sensors. Unlike passive sensors, active sensors require the energy source to come from within the sensor. A laser-beam remote sensing system is an active sensor that sends out a beam of light with a known wavelength and frequency. This beam […]
Remote sensing is an integrated discipline encompassing some branches of arts, science and technology of collecting information about the terrestrial objects using camera and sensor system. Elements of Remote Sensing 1. Energy Source The primary requirement for remote sensing is to have an energy service, which provides electromagnetic energy to the target of interest. The […]
Introduction Geoinformatics is the integration of remote sensing, Global Navigation Satellite System and Geographic Information System dealing with spatial information. Th e advent of remote sensing, Global Navigation Satellite System and Geographic Information System has made signifi cant changes in surveying and map making. A basic understanding of these components is crucial for carrying out […]
Geopolitics: Global Strategic views The study of the way a country’s size, position, etc, influence its power and its relationships with other countries. Political activity is influenced by the physical features of a country or area of the world. Geo politics is concerned with how geographical factors including territory, population, strategic location, and natural resources […]
Frontiers: International frontiers and boundaries separate land, rivers and lakes subject to different sovereignties. In 1900 frontiers had almost disappeared and had been replaced by boundaries that are lines. A Frontier is a politico geographical area, lying beyond defined borders of a political unit into which expansion could take place. Boundaries: A boundary is a […]
Nation A nation is a group of people who see themselves as a cohesive and coherent unit based on shared cultural or historical criteria. Nations are socially constructed units, not given by nature. Their existence, definition, and members can change dramatically based on circumstances. Nations in some ways can be thought of as “imagined communities” […]
Tribes of Tamil Nadu are concentrated mainly in the district of Nilgiris. Of all the distinct tribes, the Kodas, the Thodas, the Irulas, the Kurumbas and the Badagas form the larger groups, who mainly had a pastoral existence. Other tribes include, Kattunayakan and Paliyan. According to census 2011, tribal population in Tamil Nadu is 7, […]
India is the home to large number of indigenous people, who are still untouched by the lifestyle of the modern world. With more than 84.4 million, India has the largest population of the tribal people in the world. T hese tribal people also known as the adivasis are the poorest in the country, which are […]
Ethnicity is a concept referring to a shared culture and a way of life. Th is can be refl ected in language, religion, material culture such as clothing and cuisine, and cultural products such as music and art. Ethnicity is oft en a major source of social cohesion and social confl ict. Th e world […]
The race is a group of people with more or less permanent distinguishing characteristics. T here are skin colour and hair colour to which persons concerned attach certain interpretations. Objectives and s cientific classification are the division of mankind in to racial groups should be done on the basis of measurable physical features and qualities […]
Cultural realm refers to a type of cultural region. Cultural region is a continuous geographical area characterized by cultural homogeneity. It may be classified into three categories as macro, meso and micro region. Cultural realm is classified based on the attitude, religious belief, language, racial group, technological development, etc. There are twelve Cultural realms in […]
Culture Region A culture region is a portion of Earth that has common cultural elements and has distinct cultural authority from other regions. Any number of cultural components may be used to define culture regions. A map of world religions, for example, includes a shaded area in South Asia where Hinduism is dominant. Culture regions […]
For analytical purposes, World Economic Situation and Prospects classifies (WESP) all countries of the world into one of three broad categories: developed countries, countries in transition (South-Eastern Europe Commonwealth of Independent States and Georgia) less developed countries. T he classification of countries is based on the economic status such as Gross Domestic Product (GDP), Gross […]
The tertiary industry provides services to its consumers. It is also known as service industry/sector. All types of services and special skills provided in exchange of payments are called tertiary activities. Health, education, law, governance and recreation etc; require professional skills. These services require other theoretical knowledge and practical training. Most of the tertiary activities […]
Secondary sector transforms the raw materials obtained from the primary sector into consumer goods. So it consists of manufacturing and industrial activities. Since it adds value for the raw materials, it is also called as value addition sector. Industries consume large quantities of energy and require factories and machinery to convert the raw materials into […]
Primary activities help man to fulfill his needs and desires, by using resources which are gifted to man by nature. These activities are directly connected with nature. Hunting, Gathering, Pastoralism, Fishing, Forestry, Mining and Agriculture are the primary activities. Hunting and Gathering Until 12,000 years ago, all humans lived as hunters and gatherers. At present […]
It takes millions of years for the formation of minerals. Compared to the present rate of consumption, the replenishment rate of minerals is very slow. Hence, mineral resources are finite and non- renewable. Due to this, it is important to conserve the mineral resources. Ways of Conserving Resources • Controlling population growth will reduce the […]
Resources may be classified into renewable and non renewable resources. Mineral resources like coal, Petroleum and natural gas are the exhaustible or non renewable resources. They cannot be reused once they are consumed. Coal and petroleum are the fossil fuels, on which the modern culture relies so much. Energy gives motion to our industrial machines […]
Mineral Resources A homogeneous, naturally occurring substance which has a definite chemical composition is called a mineral. They can be identified by their physical properties and chemical components. Minerals exist in different types based on their formation. Almost everything we use, from a tiny particle to a huge building or a big ship all, is […]
Resources are classified on various bases. Based on the continual availability, resources are classified in to renewable and non renewable resources.The resources which can always be used again and again are known as renewable resources. It means these resources have natural regeneration and are inexhaustible. Air, water, solar energy etc are examples of renewable resources. […]