Types Of Map Projections
The three types of developable surfaces are cylinder cone and plane and their corresponding projections are called cylindrical conical and planar. These are called developable surfaces.
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What we see in a world map projection is not an accurate representation of the planet.
Types of map projections
. Conic in standard presentation conic or conical projections map meridians as straight lines and parallels as arcs. The earth is spherical in nature and to accurately represent the shape area distance and direction sadd of the entire or part of the earth s surface in a single map projection is not possible. Many types of map projections are being used for map making. A cylindrical projection is any projection in which the meridians are mapped to parallel spaced vertical lines and latitudes are mapped to horizontal lines.The north to south stretching equals east to west but grows with. There are more than two hundred different map projections. Pseudocylindrical in standard presentation these map the central meridian and parallels as straight lines. To give one example of this complexity the map projection conformal conic projection with two standard parallels means that the projection is conformal that the intermediate surface is a cone and that the cone intersects the ellipsoid or sphere along two parallels.
Other meridians are curves or possibly straight from pole to equator regularly spaced along parallels. The projections stretch from east to west according to their geometric constructions and are the same at any chosen latitude. They are basically classified into four groups in accordance with the map projection theory or the types of surfaces that are tangent with the globe. Planar azimuthal or zenithal projection.
Some common examples are cones cylinders and planes. Type of projection cylindrical in standard presentation these map regularly spaced meridians to equally spaced vertical lines and parallels to horizontal lines. Because maps are flat some of the simplest projections are made onto geometric shapes that can be flattened without stretching their surfaces. Projections can be further categorized based on their point s of contact tangent or secant with the reference surface of the earth and their orientation aspect.
Certain map projections or ways of displaying the earth in the most accurate ways by scale are more well known and used than other kinds. Cylindrical projections are distinguished from each other by the north to south stretching denoted by φ. The four categories are. Alaska grid this.
The following table describes the various map projections and their uses. A compromise projection developed in 1889 and used for world maps. Each projection distorts maps in different ways. Three of these common types of map projections are cylindrical conic and azimuthal.
Types of map projections cylindrical. List of map projections used to represent the earth s surface. The projection we are used is commonly known as the mercator projection. Types of map projection.
In truth the area of map projections is highly complex and the enthusiast can easily lose themselves in many hours of reading.
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