what is the difference between geographic coordinate system and projected ?
what is the difference between geographic coordinate system and projected？
What is the difference between a geographic coordinate system (GCS) and a projected coordinate system (PCS) anyways? Here's the short answer: A GCS defines where the data is located on the earth's surface. A PCS tells the data how to draw on a flat surface, like on a paper map or a computer screen.2020年2月27日
Accordingly,What are projections and coordinate systems?
A projected coordinate system is a flat, two-dimensional representation of the Earth. It is based on a sphere or spheroid geographic coordinate system, but it uses linear units of measure for coordinates, so that calculations of distance and area are easily done in terms of those same units.
Subsequently, question is,What is the difference between CRS and projection?
Geographic coordinate systems are based on a spheroid and utilize angular units (degrees). Projected coordinate systems are based on a plane (the spheroid projected onto a 2D surface) and utilize linear units (feet, meters, etc.).
In this way,What do you mean by geographic coordinate system?
A geographic coordinate system is a system that uses a three-dimensional spherical surface to determine locations on the Earth. Any location on Earth can be referenced by a point with longitude and latitude coordinates.
Beside above,What is an example of a projected coordinate system?
Typically every country, state or region has its optimal projected coordinate system which minimizes distortions for particular applications like mapping. Examples are: South central Texas in the United States uses "NAD83( NSRS2007) / Texas South Central (ftUS)" with unique EPSG code 3674.
UTM stands for “Universal Transverse Mercator”. It is a geographic coordinate system which is used to identify locations on earth in meters, as measured in the Northern Hemisphere going North and East from the intersection of the equator and a central meridian assigned to each of 60 longitudinal zones around the earth.
Universal Transverse Mercator (UTM) is a map projection-based global coordinate system that provides location information using pairs of Cartesian coordinates in metric units (metres).
Right-click the data frame name and choose Properties to bring up the Data Frame Properties dialog box. Click the Coordinate System tab and navigate to the desired coordinate system for your map display.
Map projections try to portray the surface of the earth or a portion of the earth on a flat piece of paper or computer screen. A coordinate reference system (CRS) then defines, with the help of coordinates, how the two-dimensional, projected map in your GIS is related to real places on the earth.
What is the main advantage of a plane projected coordinate system over a geographic coordinate system?
Advantages of a projected coordinate system on the Cartesian plane—Calculations of distances between points are trivial. Calculations of areas are relatively easy. Graphic representations are realistic, provided the area covered is not too large.
Common coordinate systems
- Number line.
- Cartesian coordinate system.
- Polar coordinate system.
- Cylindrical and spherical coordinate systems.
- Homogeneous coordinate system.
- Other commonly used systems.
Nevertheless, WGS84 is not a projection. The image shown uses a Plate Carree (aka Equirectangular) Projection. EPSG:4326 is a "spatial reference" system.
A map projection is one of many methods used to represent the 3-dimensional surface of the earth or other round body on a 2-dimensional plane in cartography (mapmaking). This process is typically, but not necessarily, a mathematical procedure (some methods are graphically based).