Vertical Near-Side Perspective

Description

Unlike the orthographic projection, this perspective projection views the globe from a finite distance. This perspective gives the overall effect of the view from a satellite.

Learn about the Orthographic projection

Illustration of the vertical near-side perspective projection

Projection method

Planar perspective projection—viewed from a specified distance above the surface. All aspects are either circular or an area less than a full hemisphere.

Point of contact

A single point located anywhere on the globe.

Linear graticules

Properties

Shape

Minimal distortion near the center; maximal distortion near the edge.

Area

Minimal distortion near the center; maximal distortion near the edge.

Direction

True direction from the central point.

Distance

The radial scale decreases with distance from the center.

Limitations

Limited to a view less than 90° from the central point.

Uses and applications

Uses of this projection are aesthetic more than technical. The most commonly used aspect for this purpose is the oblique.

Parameters

Desktop

  • False Easting
  • False Northing
  • Longitude of center
  • Latitude of center
  • Height

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)
NoteNote:

Supported on spheres only.

Related Topics


7/31/2013