Geometry of Aerial Photography

Aerial photography is the science and technology of capturing photos of the land surface from air. The product of aerial photography is an aerial photograph which refers to a large scale photo captured from a camera attached to any flying machine. The flying machine may be a helicopter, aeroplane, drone, etc. There are many Uses … Read more

Scale of Aerial Photography

Scale of aerial photography refers to the proportion of distance between two points on the aerial photograph and the distance between the same points on the ground. It is necessary to know the scale of an aerial photograph for the interpretation and photogrammetry. There are three scenarios where we need to calculate the scale. We … Read more

Malthusian Theory of Population Growth

Thomas Malthus was a demographer and economist. His main interest was in studying the impact of growing population on the economy of a country and welfare of its people. Malthus explained his theory of population growth in “An Essay on the Principle of Population” published in 1798. Malthusian theory of population growth is based on … Read more

What is Remote Sensing and How is it used in Geography?

What is Remote Sensing? Remote sensing (RS) is the acquisition of information about an object or phenomenon without making physical contact with the object. It involves the use of sensors to record the Electromagnetic Radiation reflected or emitted from the object itself. Further, the information collected through RS can be used to create a digital … Read more

Types of Population Density?

Population Density is a quantitative measure that presents a ratio between the population of a region and its corresponding total geographical area. Researchers use population density for comparative studies in demography or population study. Further, the population density also helps us to understand the population-resource relationship. It assists in getting a better understanding of the … Read more

Factors Affecting Population Distribution

Population is unevenly spread all over the world. You might have also observed this in your locality. Some places have low concentration of population whereas some areas have high concentration of population. In the world low concentration of population are found in deserts, dense forests, mountainous areas etc. Similarly, there are many areas like coastal … Read more

What is Human Geography?

Human geography is a one of the two key branches of geography i.e. physical and human. Many people relate the word ‘Geography’ basically with knowing where things are. For instance, where is Sahara Desert, where is Mount Everest etc.? Knowing that why do they exist in specific regions is significantly important, too. It is much … Read more

Geographic Data Structure: Vector Data and Raster Data

Geographic data are geographically referenced data wherein individuals can locate and identify features by a spherical coordinate system i.e. latitude and longitude. Based on the nature of the display, this data is classified into two models i.e. vector and raster. Vector Data Vector data models use X and Y coordinates to define the geographic elements. … Read more

What is Spatial and Non-Spatial Data in GIS?

Geospatial data is primarily of two types in GIS i.e. spatial data and non-spatial data. Geographical Information System (GIS) is a computer-based programming system which integrates hardware, software, data and user interface for capturing, analyzing and presenting all forms of geographically referenced information over the surface of the earth. It allows users to analyze and visualize … Read more

Adiabatic Rate of Temperature Change

What is Adiabatic change of temperature? The change in temperature of any parcel of air due to change in pressure is called adiabatic change in temperature. This change in temperature happens without exchange of heat of a given parcel of rising air with the surrounding air. Let’s disaggregate this concept First, Earth surface gets heated … Read more