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A Projection is defined as a process which transforms points in a coordinate system of dimension n into points in a coordinate system of dimension less than n.The mapping of 3D objects onto the 2D screen is done by straight projection rays (called projectors) emanating from a center of projection, passing through each point of the object, and intersecting a projection plane to form the projection.Projections can be divided into two basic classes:Perspective or Vanishing Point Method (VPM)Parallel Projection
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A planar projection is one wherein the points from a three-dimensional object are mapped on a two dimensional surface. One example is seen when a map of the world is projected on a flat page.
This map projection has the advantage of showing the correct distances between places when taken from the centre point of the projection, however it has the disadvantage that the distances from all other points are incorrect, and areas and shapes get distorted more that one moves away from the centre of the projection.
A means of showing a curved surfaces o a flat map is called a projection. Each type of projection distorts the appearance of Earth's features in a different way. For example, some projections distort distance, while others distort directions between two points.
A Projection is defined as a process which transforms points in a coordinate system of dimension n into points in a coordinate system of dimension less than n.The mapping of 3D objects onto the 2D screen is done by straight projection rays (called projectors) emanating from a center of projection, passing through each point of the object, and intersecting a projection plane to form the projection.Projections can be divided into two basic classes:Perspective or Vanishing Point Method (VPM)Parallel Projection
A Projection is defined as a process which transforms points in a coordinate system of dimension n into points in a coordinate system of dimension less than n.The mapping of 3D objects onto the 2D screen is done by straight projection rays (called projectors) emanating from a center of projection, passing through each point of the object, and intersecting a projection plane to form the projection.Projections can be divided into two basic classes:Perspective or Vanishing Point Method (VPM)Parallel Projection
Two points a region
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A graduated cylinder is called such because it is more than just a cylinder. It is a cylinder used to measure liquid volume precisely. It is technically "smarter" than a cylinder hence it is "graduated".
A map projection that is used for sea travel includes the gnomonic projection. This was most often used to find the shortest routes between points on a sphere.
3D projection is any method of mapping three-dimensional points to a two-dimensional plane. It is used for certain types of engineering drawings.
Topographic map
This map projection has the advantage of showing the correct distances between places when taken from the centre point of the projection, however it has the disadvantage that the distances from all other points are incorrect, and areas and shapes get distorted more that one moves away from the centre of the projection.
A planar projection is one wherein the points from a three-dimensional object are mapped on a two dimensional surface. One example is seen when a map of the world is projected on a flat page.
Polar projections are often made in what is called the Azimuthal Equidistant Projection. The projection would be made tangent at the north pole, or at the south pole. These projections allow you to make linear measurements from the pole to any point on earth. These measurements are the shortest distances from the pole to the points and can be directly compared to one another. A polar projection shows the poles; I learned it in my science class.
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