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Perspective

  • Description
  • Projection method
  • Point of contact
  • Linear graticules
  • Properties
  • Limitations
  • Uses and applications
  • Parameters

Description

Also known as vertical near-side perspective or vertical perspective, this projection is similar to the orthographic projection in that its perspective is from space. In this projection, the perspective point is not an infinite distance away; instead, you can specify the distance. The overall effect of this projection is that it looks like a photograph taken vertically from a satellite or space vehicle.

Learn more about the orthographic projection

Illustration of the perspective projection

Projection method

Planar perspective projection. The distance above the earth is variable and must be specified before the projection can be calculated. The greater the distance, the more closely this projection resembles the orthographic projection. All aspects are circular projections of an area less than a hemisphere.

Point of contact

A single point anywhere on the globe.

Linear graticules

  • All aspects—the central meridian of the projection.
  • Polar aspect—all meridians.
  • Equatorial aspect—the equator.

Properties

Shape

Minimally distorted near the center, increasing toward the edge.

Area

Minimally distorted near the center; the area scale then decreases to zero on the edge or horizon.

Direction

True directions from the point of tangency.

Distance

Radial scale decreases from true scale at the center to zero on the projection edge. The scale perpendicular to the radii decreases, but not as rapidly.

Limitations

The actual range depends on the distance from the globe. In all cases, the range is less than 90° from the center.

Uses and applications

Used as an aesthetic presentation rather than for technical applications.

Parameters

Desktop

  • Use Vertical Near-Side Perspective.Learn more about the vertical near-side perspective projection

Workstation

  • Radius of the sphere of reference
  • Height of perspective point above sphere
  • Longitude of center of projection
  • Latitude of center of projection
  • False Easting (meters)
  • False Northing (meters)
Note:

Supported on spheres only.

geographic_coordinate_systems.pdf

A geographic coordinate systems pdf file which contains lists of supported gcs and vcs.

projected_coordinate_systems.pdf

A projected coordinate systems pdf file which contains lists of supported pcs.

geographic_transformations.pdf

A geographic transformations pdf file which contains lists of supported geographic and vertical transformations.

Related Topics

  • List of supported map projections
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