How is the type of chart projection called, which is constructed by placing a cone around an imaginary earth, so that it cuts the earth at two different parallels of latitude?
Refer to figure.
The conic projection is derived by placing a cone over the reduced Earth. Unlike the simple conic projection, in a Lambert Conformal Conic projection, the cone cuts through the Earth at two specific latitudes, called “Standard Parallels”. At these two parallels, the scale of the chart matches the scale of the Earth, because the standard parallels are the same on the globe as on the cone.
Parallel of origin is the latitude exactly midway between the standard parallels, where scale is at its minimum (most contracted) and the cone is parallel to the tangent.
Between the standard parallels, the scale contracts (decreases), i.e. the distance on the reduced Earth is greater than the chart distance. Whilst, outside the standard parallels, the scale expands (increases).
Stereographic chart projection is a method used for polar regions covering areas, which cannot be depicted with Transverse Mercator projection. This projection is a planeprojection and the parallel of origin is the pole. Meridians are straight lines radiating from the pole, which cut parallels at right angles. Parallels of latitude are shown as concentric circlesand their distanceapart increases away from the pole.
Simple conic projection is a conical projection derived by placing a cone over the reduced Earth tangential to only one parallel of latitude, called as “Parallel of Origin”.
Transverse Mercator projection is a cylindrical projection and its parallel of origin is the Equator. When the cylinder is developed, the meridians are straight lines which cut the parallels at right angles, and the parallels are also straight lines parallel to the Equator.
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