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Topic: Albers Conic Projection

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	Map projection - Wikipedia, the free encyclopedia
		Unavoidably, all cylindrical projections have an east-west stretching away from the equator by a factor equal to the secant of the latitude, compared with the scale at the equator.
		Pseudocylindrical projections represent the central meridian and each parallel as a straight line segment, but not the other meridians, except for the Collignon projection, which in its most common forms represents all meridians as straight lines from the poles to the equators as straight line segments.
		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).
	en.wikipedia.org /wiki/Map_projection (2742 words)

	Conic Projection Page
		In the normal aspect (which is oblique for conic projections), parallels are projected as concentric arcs of circles, and meridians are projected as straight lines radiating at uniform angular intervals from the apex of the flattened cone.
		adapting the conic projection of the sphere to that of the ellipsoid, and
		The last of the basic conic projections (fig.3.16) to be developed with one of the three major properties of conformality, equivalence or equidistance along meridians was this equal-area presented by H.C. Albers (1805a), three months after Mollweide presented his elliptical world map in the same journal.
	www.geography.hunter.cuny.edu /mp/conic.html (1361 words)

	Map Projection - GIS Terminology (Site not responding. Last check: 2007-10-23)
		A map projection is one of many methods used to represent the 3-dimensional surface of the earth or other round body on a 2-dimensional plane in cartography (mapmaking).
		The projections are described in terms of placing a gigantic planar surface in contact with the earth, followed by an implied scaling operation.
		Azimuthal projections touch the earth to a plane at one tangent point; angles from that tangent point are preserved, and distances from that point are computed by a function independent of the angle.
	www.gislounge.com /glossary/bldefmapprojection.shtml (1354 words)

	Wikinfo \| Map projection
		Werner cordiform projection designates a pole and a meridian; distances from the pole are preserved, as are distances from the meridian (which is straight) along the parallels.
		Azimuthal equidistant projection is used by amateur radio operators to know the direction to point their antennas toward a point and see the distance to it.
		Logarithmic Azimuthal Projection is constructed so that each point's distance from the center of the map is the logarithm of its distance from the tangent point on the Earth.
	www.wikinfo.org /wiki.php?title=Map_projection (1742 words)

	WorldPlot
		It is produced by adjusting a cylindrical projection that is projected from the center of the Earth.
		A conic projection is produced by projecting the surface of the Earth onto a cone that is tangential to the Earth along a circle.
		For example, the Lambert azimuthal projection projects the surface of the Earth onto a plane that is tangent at one point.
	documents.wolfram.com /v4-de/AddOns/Miscellaneous/WorldPlot.html (1463 words)

	Geographic Coordinate System Definitions
		This is not a projection but a coordinate system that came into use in the United States in the 1930s when the United States Coast and Geodetic Survey used it to provide a common reference system to surveyors and mappers.
		In the case of states that have an extensive east-west expanse, the Lambert conformal conic projection is used.
		HARN and HPGN are both names for the same project that is focused on readjusting the NAD83 datum to a higher level of accuracy state by state.
	www.fgdl.org /tutorials/howto_reproject/Definitions.html (933 words)

	Geography Glossary
		Map projections are numerous and complex (e.g., there are a variety of cylindrical, conic, or azimuthal projections).
		Each projection has advantages and serves different purposes, and each produces different types of distortions in direction, distance, shape, and relative size of areas.
		The Mercator projection was used well into the 20th century, but has now been superseded by others, including the widely used Robinson projection.
	www.infoplease.com /ipa/A0908193.html (1150 words)

	5.2.2 Lambert Conic Conformal Projection (-Jl -JL)
		This conic projection was designed by Lambert (1772) and has been used extensively for mapping of regions with predominantly east-west orientation, just like the Albers projection.
		Unlike the Albers projection, Lambert's conformal projection is not equal-area.
		As with Albers projection, it is only the two standard parallels that are distortion-free.
	www.ucalgary.ca /appinst/pubdoc/gmt344/doc/html/GMT_Docs/node43.html (249 words)

	5.2.1 Albers Conic Equal-Area Projection (-Jb -JB)
		This projection, developed by Albers in 1805, is predominantly used to map regions of large east-west extent, in particular the United States.
		It is a conic, equal-area projection, in which parallels are unequally spaced arcs of concentric circles, more closely spaced at the north and south edges of the map.
		The projection center defines the origin of the rectangular map coordinates.
	www.earth.rochester.edu /ees254/gmt/doc/html/GMT_Docs/node42.html (248 words)

	Index
		Cartesian Linear Projection (-—Jx -—JX) to Cartesian Linear Projection (-—Jx -—JX)
		Conic Projections to Lambert Conic Conformal Projection (-—Jl -JL)
		Orthographic Projection (-—Jg imuthal Equidistant Projection (-—Je Gnomonic Projection (-—Jf -JF)
	www.ifg.uni-kiel.de /gmt/doc/html/GMT_Docs/node149.html (672 words)

	Albers Equal-Area Conic Projection -- 3DSoftware.com (Site not responding. Last check: 2007-10-23)
		The Albers Equal-Area Conic map projection is used in the sectional maps of all 50 States in the National Atlas (1970), and for many other U.S. maps.
		Once the standard parallels are selected, all these projections are constructed by using the same formulas used for the Albers Equal-Area Conic with two standard parallels.
		Standard conic formulas must be rewritten for the third and fourth limiting forms.
	3dsoftware.com /Cartography/USGS/MapProjections/Conic/AlbersEqualArea (468 words)

	British Columbia Albers Standard Projection
		This projection has since been officially adopted by the BC Government Resource Inventory Committee as one of three (BC Albers, Geographics, and UTM) standard projections for spatial data storage and use.
		The boxes were projected into each projection, and each side and the area was measured in the projection.
		The Albers conic projection rotates the data, because it is so far from the central meridian.
	srmwww.gov.bc.ca /gis/bceprojection.html (1266 words)

	World Equidistant Conic Projection (Site not responding. Last check: 2007-10-23)
		The World Equidistant Conic projection provides a view of the earth and the spatial relationships between northern hemisphere continents that we usually are not aware of.
		The shape of continents in the projection is distorted, with the distortion increasing as you move from the north pole to the south, but distances remain accurate.
		The above view of the contiguous 48 states is projected in Albers Equal Area with a central meridian of -80.00, which centers the projection on my home state of South Carolina.
	www.unm.edu /~chepler/CE_547/assignment_3.htm (126 words)

	CartoTalk > Example Map Produced with GMT
		Data was projected to an Albers Conic projection and plotted with the open source GMT tools.
		Also, the data may come in projected or un-projected coordinates, however all data within a single map should be in the same projection.
		If the input data are in lat/long, GMT will project it all to the coordinate system defined when plotting the data- as was the case of my example map.
	www.cartotalk.com /lofiversion/index.php?t499.html (603 words)

	NSDL Metadata Record -- Albers Equal-Area Conic Projection -- from MathWorld
		NSDL Metadata Record -- Albers Equal-Area Conic Projection -- from MathWorld
		Let \phi_0 be the latitude for the origin of the Cartesian coordinates and \lambda_0 its longitude, and let \phi_1 and \phi_2 be the standard parallels.
		Then the Albers equal-area conic projection maps latitude and longitude (\phi,\lambda) to Cartesian (x, y) coordinates x = \rho\sin\theta y = \rho_0-\rho\cos\theta, where n = {{1\over 2}}(\sin\phi_1+\sin\phi_2) \theta = n(\lambda-\lambda_0) C = \cos^2\phi_1+2n\sin\phi_1 \rho = {\sqrt{C-2n\sin\phi}\over n} \rho_0 = {\sqrt{C-2n\sin\phi_0}\over...
	nsdl.org /mr/697488 (95 words)

	Projection Carmichael (Site not responding. Last check: 2007-10-23)
		The Board of Directors adopted the FY 2003-2004 budget and five-year water rate schedule at the June 23, 2003 board meeting.
		bigness and alienation is obscured by ideology and projection that is not deeply believed in but motivated by...
		Thus theories of projection tend to support the indivdualist view (projections come from the psyche, rather than...
	www.call-therapy.com /Projection/Carmichael.htm (426 words)

	Spatial News RE: MI-L Albers Conical Equal Area Archives
		Is this the same as Albers Conical Equal
		A projection is an abstract set of mathematical formulae for =
		projection to use for a map of the entire United States.
	spatialnews.geocomm.com /community/lists/viewmessage.phtml?id=32648 (380 words)

	EPA/OW Industrial Facilities Discharge Database for CONUS
		The original file was reprojected into an Albers Conformal Conic projection and clipped to the Atlanta Regional Commission ten county boundary using the ARCVIEW Geoprocessing Wizard.
		The resulting ASCII file was converted into an ARC/INFO coverage in national Albers projection for the United States.
		The coverage was then overlaid with county coverages to assign accuracy codes based on the state-county FIPS codes.
	monarch.gsu.edu /intermaps/Ifdd.htm (798 words)

	Scale (collect & present) (Site not responding. Last check: 2007-10-23)
		Projected on to Watershed Atlas (Albers Equal Conic Projection).
		Primary objective of FISS is to provide a standard set of information to assist with planning, project reviews, requests for information, and research.
		FISS is a data set of summary level fish and fish habitat data.
	www.nativemaps.org /database/scale/50_249.htm (3434 words)

	METADATA
		The coverages were reprojected from Albers Conic Equal Area projection
		The Basins data was distributed by EPA as arcview projects.
		The data was then PROJECTed from Geographic NAD 27 to Lambert NAD 83.
	monarch.gsu.edu /intermaps/pcs.htm (1466 words)

	From The Cover: Diffusion-based method for producing density-equalizing maps -- Gastner and Newman 101 (20): 7499 -- ...
		projection, such as a Robinson projection or an equal-area conic
		construct a projection in which areas on the map are proportional
		Results of the 2000 U.S. presidential election shown on a standard Albers conic projection (c), on a cartogram based on the population density in a (d), and on a cartogram constructed with the finer population density of b (e).
	www.pnas.org /cgi/content/full/101/20/7499 (4352 words)

	TerraLib: Annotated Index
		Provides methods that are required to handle Lambert conformal conic map projection.
		Provides methods that are required to handle the Miller map projection
		Provides methods that are required to handle all map projection definitions and georeferencing of satellite images
	terralib.dpi.inpe.br /html/cv/annotated.html (1250 words)

	[No title] (Site not responding. Last check: 2007-10-23)
		See Figure 2 in the report for the association of Tetra Tech numeric horizon names with current USGS horizon names.
		All the data files are in ASCII format with location coordinates given in both latitude, longitude (NAD27 datum), and projected meters (Albers conformal conic projection, NAD27 datum, standard parallels of 55 and 65 degrees north, base latitude of 50 degrees north and central meridian of 154 degrees west).
		Stratigraphic horizon abbreviations: SRF = topographic surface NNU = Nanushuk FM = Fortress Mountain LCU = Lower Cretaceous Unconformity SAG = Sag River SAD = Sadlerochit ECH = Echooka LIS = Lisburne ICF = Intermediate Composite Features ALA = Alapah END = Endicott BMT = Basement
	pubs.usgs.gov /of/2002/ofr-02-111/Data/AAAREADME.TXT (159 words)

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