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Topic: Azimuthal equidistant projection

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	Azimuthal Map Projections -- 3DSoftware.com (Site not responding. Last check: 2007-10-14)
		Azimuthal projections are characterized by the fact that the direction, or azimuth, from the center of the projection to every other point on the map is shown correctly.
		A sixth azimuthal projection of increasing interest in the space age is the general Vertical Perspective (resembling the Orthographic), projecting the Earth from any point in space, such as a satellite, onto a tangent or secant plane.
		The simplest forms of the azimuthal projections are the polar aspects, in which all meridians are shown as straight lines radiating at their true angles from the center, while parallels of latitude are circles, concentric about the pole.
	www.3dsoftware.com /Cartography/USGS/MapProjections/Azimuthal (909 words)

	Azimuthal equidistant projection -- Facts, Info, and Encyclopedia article (Site not responding. Last check: 2007-10-14)
		The azimuthal equidistant projection is a particular (A projection of the globe onto a flat map using a grid of lines of latitude and longitude) map projection.
		A useful application for this type of projection is a Polar Projection in which all distances measured from the center of the map along any longitudinal line are accurate.
		This projection is used by the (Click link for more info and facts about USGS) USGS in the National Atlas of the United States of America, and for large-scale mapping of (A country scattered over Micronesia with a constitutional government in free association with the United States; achieved independence in 1986) Micronesia.
	www.absoluteastronomy.com /encyclopedia/A/Az/Azimuthal_equidistant_projection.htm (202 words)

	OMC: supported projections
		Projection number five (Azimuthal Equidistant Projection) returns a circular plot of the entire world with the area of interest as the center, distances measured from there are true.
		The most noticeable feature of this azimuthal projection is the fact that distances measured from the center (of the map) are true.
		The orthographic azimuthal projection is a perspective projection from infinite distance.
	www.aquarius.geomar.de /omc/omc_project.html (628 words)

	The Azimuthal Equidistant Projection (Site not responding. Last check: 2007-10-14)
		Although this projection is a nice compromise between conformal and equal-area projections, its main claim to fame comes from another property it has, which allows maps like this to be drawn:
		Since the azimuthal equidistant projection shows every point on the globe at its correct distance, and in its correct direction, from the center of the projection, maps in this projection centered on one's own location, like the map above, centered on Edmonton, Alberta, are very useful to people engaged in long-distance radio communications.
		the azimuthal equidistant projection can indeed be used to make reasonable maps of extended areas of the world.
	members.shaw.ca /quadibloc/maps/maz0203.htm (132 words)

	Stooke Small Bodies Maps (Site not responding. Last check: 2007-10-14)
		The morphographic conformal projections are shaded relief drawings projected onto the 3D convex hull of the shape, then reprojected to Morphographic Conformal (effectively Stereographic) projection, in two hemispheres centered on the equator and longitudes 90 and 270.
		Cylindrical projections are a subset of prismographic projections.
		Note: Morphographic Conformal projection is shaded relief drawing projected onto the 3D convex hull of the shape, then reprojected to morphographic conformal (effectively stereographic) projection, in two hemispheres centered on the equator and at longitudes 90 and 270.
	www.psi.edu /pds/archive/astdata03/maps (1722 words)

	Encyclopedia: Azimuthal equidistant projection (Site not responding. Last check: 2007-10-14)
		The azimuthal equidistant projection is a particular map projection.
		An example of a azimuthal equidistant projection can be seen on the United Nations flag.
		This projection is used by the USGS in the National Atlas of the United States of America, and for large-scale mapping of Micronesia.
	www.nationmaster.com /encyclopedia/Azimuthal-equidistant-projection (302 words)

	Azimuthal - Map projection (Site not responding. Last check: 2007-10-14)
		[[Image:Usgs map azimuthal equidistant.PNGframerightAn Azimuthal projection shows distances and directions accurately from the center point, but distorts shapes and sizes elsewhere.]] Azimuthal projections have the property that directions from a central point are preserved (and hence, great circles through the central point are represented by straight lines on the map).
		Some azimuthal projections are true perspective projections; that is, they can be constructed mechanically, projecting the surface of the Earth by extending lines from a points of perspective (along an infinite line through the tangent point and the tangent point's antipode) onto the plane.
		azimuthal equidistant: r(d) = cd; it is used by amateur radio operators to know the direction to point their antennas toward a point and see the distance to it.
	map-projection.en.exsugo.org /Azimuthal.htm (405 words)

	Cartographiometry Glossary of Terms
		A gnomonic projection is an azimuthal projection obtained by projecting the earth onto a plane that touches the earth at a single point, using an imaginary light source located at the earth's center.
		A stereographic projection is an azimuthal projection obtained by projecting the earth onto a plane that touches the earth at a central point using an imaginary light source located directly opposite (antipodal to) the map's center.
		An orthographic projection is an azimuthal projection obtained by projecting the earth onto a plane that touches the earth at a central point using an imaginary light source located "at infinity" and shining at right angles to the projecting plane.
	www06.homepage.villanova.edu /timothy.feeman/cartography/textsupp/keywords.htm (3332 words)

	* Azimuthal Equidistant - (GIS): Definition
		An azimuthal projection which is neither equal-area nor conformal.
		Let and be the latitude and longitude of the center of the projection, then the transformation equations are given by...
		Azimuthal Equidistant The globe is projected on a flat surface on a map.
	en.mimi.hu /gis/azimuthal_equidistant.html (196 words)

	Azimuthal Equidistant Projections
		The azimuthal equidistant projection has been around for centuries, mostly for a single, specialized use: This projection excels at making maps of the polar regions.
		Tearing: Azimuthal equidistant maps tend to be circular in shape, and typically are used to show no more than half the Earth (i.e., one hemisphere) in any one map.
		Uses: While it is possible to use the azimuthal equidistant projection to create maps covering the entire globe, it is very uncommon to show anything larger than a single hemisphere on such a map.
	www.cnr.colostate.edu /class_info/nr502/lg2/projection_descriptions/azimuthal.html (577 words)

	[No title]
		303.___1945, Azimuthal equidistant projection of the sphere: Amer.
		The projection of P. Chebyshev for mapping of polar regions.] 343h.___1987, K voprosu o poluchenii izometricheskikh koordinat i ravnougol'noy tsilindricheskoy proyektsii trekhosnogo ellipsoida: Izvestiya Vysshikh Uchebnykh Zavedeniy.
		Burney, James, 1803, Remarks on the projection of charts and particularly on the degree of curvature proper to be given to the parallels of latitude, in his A chronological history of the discoveries in the South Sea or Pacific Ocean: London, v.
	www.cs.albany.edu /~amit/bib/mapproj.txt (15646 words)

	Azimuthal Equidistant Projection (Site not responding. Last check: 2007-10-14)
		Video projection is similar to a film or slide projection meaning that both accept some kind of source and project the image from that source onto some screen.
		Azimuthal Equidistant Projection -- 3DSoftware.com - The Azimuthal Equidistant projection is an Azimuthal map projection.
		An azimuthal projection of the world is a useful map for determining approximate epicentral...
	www.valueprojectors.com /azimuthal-equidistant-projection.html (721 words)

	Azimuthal Projections (Site not responding. Last check: 2007-10-14)
		Hence, with the gnomonic projection, the interior of a hemispherical region of the globe is projected to the
		The default clipping region for the gnomonic projection is a circle with a radius of 60 degrees at the center of projection.
		The azimuthal equidistant projection is also not a true perspective projection, because it preserves correctly the distances between the tangent point and all other points on the globe.
	idlastro.gsfc.nasa.gov /idl_html_help/projections9.html (1384 words)

	The Hammer-Aitoff Projection (Site not responding. Last check: 2007-10-14)
		This map was created from a hemisphere of the equatorial case of Lambert's Azimuthal Equal-Area projection using a trick similar to the method by which the Miller Cylindrical projection was made from the Mercator projection.
		Note that Adams' Equal-Area projection, which spaces the parallels as they are spaced on the central meridian of an equatorial Lambert's Azimuthal projection, could be thought of as the limiting case of this kind of manipulation.
		This projection was devised by Hammer, using the idea first used by Aitoff in making a compromise projection in such an ellipse from the Azimuthal Equidistant projection.
	members.shaw.ca /quadibloc/maps/meq0801.htm (342 words)

	* Equidistant Projection - (GIS): Definition
		For example, a planar equidistant projection centred on Montréal, would show the correct distance to any other location on the map,...
		The use of minimum-error projections is however exceptional.
		Their mathematical theory is difficult and the equidistant projections of the same class will provide a very similar map...
	en.mimi.hu /gis/equidistant_projection.html (211 words)

	Map Projections: Azimuthal Projections (Site not responding. Last check: 2007-10-14)
		Given reference point A, the azimuth remains unchanged from points B and C on the sphere to corresponding B' and C' on an azimuthal map.
		Because - in contrast to the azimuthal orthographic - scale is greatly stretched away from the center of the map, azimuthal stereographic maps are usually constrained to the hemisphere opposite the source point, or an even smaller region.
		In the north polar aspect, the azimuthal equidistant is familiar as part of both flag and emblem of the United Nations Organization, with olive branches replacing Antarctica.
	www.progonos.com /furuti/MapProj/Normal/ProjAz/projAz.html (836 words)

	Azimuthal Map Projections Page
		A perspective projection from the center of the globe onto a tangent plane at the central point of the projection.
		A perspective projection of the globe onto a tangent (or secant) plane from a point opposite the point of the projection center.
		The minimum-error azimuthal projection of a region enclosed by a great or small circle at a given radius from the projection center.
	www.geography.hunter.cuny.edu /mp/plane.html (545 words)

	Ask Norm - October 1998
		Second, to accomplish this task, we observe that all projections are designed to do the same job; convert spherical/ellipsoidal latitude and longitude coordinates to cartesian X and Y coordinates (and vice versa).
		This usually works well as the Azimuthal Equidistant will faithfully compute distances from the origin to points as much as 600 kilometers away quite accurately (even on the ellipsoid).
		Mentor Software’s implementation of the Azimuthal Equidistant Projection includes a parameter not normally supported by other vendors; the azimuth of the Y axis relative to true north.
	www.mentorsoftwareinc.com /cc/asknorm/ask1098.htm (786 words)

	Azimuthal Equidistant Projection -- 3DSoftware.com (Site not responding. Last check: 2007-10-14)
		The Azimuthal Equidistant projection is an Azimuthal map projection.
		Compromise in distortion between Stereographic (conformal) and Lambert Azimuthal Equal-Area projections.
		Airy and Breusing azimuthal projections have spacings very similar to those of the Azimuthal Equidistant if the extent is less than one hemisphere.
	www.3dsoftware.com /Cartography/USGS/MapProjections/Azimuthal/AzimuthalEquidistant (465 words)

	[No title]
		The Gnomonic projection (Figure 9-2) is another member of the azimuthal projection family (maps projected to a plane surface that is tangent to the globe at a single point), and it has the distinction of being the only map projection on which any straight line represents a great-circle arc.
		Figure 9-2, for example, shows a Gnomonic projection centered on the North Pole and extending outward only 65° (to 25° N latitude), and it is evident how distorted the shapes have become.
		To achieve a straight line for the great-circle arc between Miami and Tokyo with this projection, one could rotate the projection to a position where Miami and Tokyo lie on the "equator" of the projection, much as was done along the central meridian in Figure 9-3.
	www.gis.psu.edu /projection/chapter9.html (1057 words)

	Geographic Database Search Interfaces and the Equatorial Cylindrical Equidistant Projection
		A map projection is a one to one mapping (in the mathematical sense) of points on the curved surface to points on the plane.
		The ECE projection is attractive because the (lat, lon) coordinates are cartesian.
		In an Orthographic projection centered on the center of the data (Figure 9) the data coverage area for the Russian eighth orbit is indeed nearly a nice rectangle.
	chukchi.colorado.edu /PAPER (10776 words)

	Index
		Cartesian Linear Projection (-—Jx -—JX) to Cartesian Linear Projection (-—Jx -—JX)
		Conic Projections to Equidistant Conic Projection (-—Jd -JD)
		Azimuthal Equidistant Projection (-—Je -—JE) to Azimuthal Equidistant Projection (-—Je gnomonic
	www.uni-koeln.de /rrzk/software/grafik/visualization/gmt/gmt/doc/html/gmt_docs/node171.html (706 words)

	Equidistant Azimuthal Projection (Mapping Toolbox) (Site not responding. Last check: 2007-10-14)
		There are no standard parallels for azimuthal projections.
		This projection may have been first used by the ancient Egyptians for star charts.
		This projection is available for the spherical geoid only.
	www.tau.ac.il /cc/pages/docs/matlab/help/toolbox/map/equidistantazimuthalproje.html (142 words)

	Two-Point Equidistant Projection -- 3DSoftware.com (Site not responding. Last check: 2007-10-14)
		The Two-Point Equidistant map projection shows true distances, but not true azimuths, from either of two chosen points to any other point on the map.
		Azimuthal Equidistant on which distance is correct from only one point.
		Used by telephone companies to establish long-distance rates, the Donald is a Two-Point Equidistant projection specially modified for the ellipsoid and confined to the United States and southern Canada.
	www.3dsoftware.com /Cartography/USGS/MapProjections/ModifiedAzimuthal/TwoPointEquidistant (200 words)

	Azimuthal Projections (Site not responding. Last check: 2007-10-14)
		Azimuthal projections are projections that are radially symmetric in all directions from the center point of the map, which can be thought of as being the tangent point on a globe from which projection takes place.
		Some azimuthal projections are in fact perspective projections, which can be constructed by following straight lines from some common origin from each point on the globe to be mapped to a flat plane tangent at that the center of the projection.
		The Gnomonic, Stereographic, and Orthographic projections are in this category, while the Azimuthal Equidistant projection, and Lambert's Azimuthal Equal-Area Projection are not.
	members.shaw.ca /quadibloc/maps/mazi02.htm (99 words)

	Oblique Azimuthal Equidistant Map Projection (Site not responding. Last check: 2007-10-14)
		This map is a special map projection that displays great-circle paths as straight lines.
		Each of the azimuthal lines (or "spokes") radiating from the center of the map and labelled on the outside of the map are great-circle paths from the location where the azimuthal lines converge to every other region of the world.
		The white dots labelled on this map represent the magnetic observatories that were used to form the prediction table.
	solar.spacew.com /solar/63n145w.html (320 words)

	and commanded them. - dismantli azimuthal equidistant projection is example financial report (Site not responding. Last check: 2007-10-14)
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	www.hollystar.com /dismantli/azimuthal-equidistant-projection.html (578 words)

	when he had made an end of communing with him upon mount Sinai. - equidista azimuthal equidistant projection is ... (Site not responding. Last check: 2007-10-14)
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	www.hollystar.com /equidista/azimuthal-equidistant-projection.html (570 words)

	United Nations Organization
		The emblem consists of a circular map of the earth in azimuthal equidistant projection centered at the North Pole between two olive branches.
		The map projection used is Azimuthal Equidistant, centred at the North Pole.
		Projecting an image of unity and hope for the future, 179 flags of UN Member States stand in an undulating row in front of Headquarters in New York City.
	flagspot.net /flags/uno.html (2507 words)

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