Zenithal Orthographic Polar Projection
 Lines of Latitude •Equator •Latitudes Lines of Longitude •Prime Meridian •Longitudes Relationships Facts on Earth Zenithal Projections •Gnomonic Polar •Gnomonic Equatorial •Stereographic Polar •Stereographic Equatorial •Orthographic Polar •Orthographic Equatorial Simple Conic Projection Cylindrical Equal-area Projection References Figure A     Figure B     Figure C In Orthographic projections, projections of parallels and meridians are created by projecting from a point at infinite distance away from the projection plane, which sit tangential to the other end of the diameter. This situation is clearly depicted in Figure A where the light source comes from the south of the circle at an infinite distance. As a result, the white rays radiating from that infinite point willl appear to go through the earth parallel to each other (as is the case of AB, CD and EF). The projection plane CE is situated tangentially to the north of the polar axis AB. Such an arrangement makes this projection a polar projection. Like other Zenithal projections, one can think of the orthographic projection as being created by the shadows casted upon the projection plane CE by the parallels and meridians. With the red line segment GH representing an arbitrary parallel and