the topographical features of a region, usually of the earth, sometimes of the planets.

Science to deal with the difference in surface area of ​​the earth, such as climate, elevation, soil, vegetation, population, land use, industry or country, is characterized by world factors, placement and interrelationship. The cell region is formed by a complex of these individual elements

Topography: This includes the study of terrain and exploration characteristics on the earth. Science helps clarify aspects related to the terrain of the earth, such as its history and dynamics. Topography will also try to predict future changes in geophysical properties. Glacierology: This field of physical geography includes glacier interactions and their impact on the global environment. Therefore, glaciology involves glacier research, including alpine glaciers and continental glaciers. Glacier geology, snow and hydrology, etc. are some subfields of glacial research.

The Earth is the only planet with a hydrosphere, where water exists as liquid, vapor, and solid. This is because the surface temperature of the earth is usually kept at 0 ° C to 100 ° C water. The temperature on the earth is controlled by the distance between the sun and the earth's atmosphere, which tends to soften the temperature change. The earth is the only planet with a weathered layer. Regolith is a thin cover of loose rock debris formed by a process called weathering. Weathering is a mechanical and chemical reaction between earth's rock and its hydrosphere, atmosphere and biosphere. Other planets have something like weathered layers, but most are formed by collision of meteorites. Earth is unique as other processes were done to create more diverse weathered layers

There are various topographies and water on the topographical surface of the earth. The surface of this topography is often a concern for geomorphists, hydrologists and geophysicists. It is a surface for earth observation, but mathematical modeling of irregularities while considering them will be very complicated. The Pythagorean spherical globe concept provides a mathematically easy-to-handle simple surface. Many astronomical calculations and navigation calculations use spheres to simulate the Earth as an approximation. However, in order to measure distances and areas exceeding the pure local scale, more accurate figures are required. A better approximation can be obtained by modeling the entire surface as a flat sphere by using a spherical harmonic to approximate the geoid or by using the optimal reference ellipsoidal modeling region.