projected
State of Alaska Department of Natural Resources
2006-11-11
true
false
http://www.opengis.net/def/crs/EPSG/0/3338
NAD83 / Alaska Albers
United States (USA) - Alaska.
172.42
-129.99
51.3
71.4
OGP
2014-05-01
false
false
http://www.opengis.net/def/area/EPSG/0/1330
USA - Alaska
Area crosses 180-degree meridian.
Small scale mapping and state planning.
conversion
State of Alaska Department of Natural Resources.
2006-11-11
true
false
http://www.opengis.net/def/coordinateOperation/EPSG/0/15021
Alaska Albers (meters)
United States (USA) - Alaska.
172.42
-129.99
51.3
71.4
OGP
2014-05-01
false
false
http://www.opengis.net/def/area/EPSG/0/1330
USA - Alaska
Area crosses 180-degree meridian.
Small scale mapping and state planning.
ISO 1000.
1995-06-02
false
http://www.opengis.net/def/uom/EPSG/0/9001
metre
Also known as International metre. SI standard unit.
length
0
USGS Professional Paper 1395, "Map Projections - A Working Manual" by John P. Snyder.
2007-03-27
false
true
See Information Source.
http://www.opengis.net/def/method/EPSG/0/9822
Albers Equal Area
Note: These formulas have been transcribed from EPSG Guidance Note #7-2. Users are encouraged to use that document rather than the text which follows as reference because limitations in the transcription will be avoided.
To derive the projected coordinates of a point, geodetic latitude (lat) is converted to authalic latitude (ß). The formulas to convert geodetic latitude and longitude (lat, lon) to Easting (E) and Northing (N) are:
Easting (E) = EF + (rho . sin(theta))
Northing (N) = NF + rhoO ? (rho . cos(theta))
where
theta = n . (lon - lonO)
rho = [a . (C ? n.alpha)^0.5] / n
rhoO = [a . (C ? n.alphaO)^0.5] / n
and
C = m1^2 + (n . alpha1)
n = (m1^2 ? m2^2) / (alpha2 - alpha1)
m1 = cos lat1 / (1 ? e^2 sin^2(lat1))^0.5
m2 = cos lat2 / (1 ? e^2 sin^2(lat2))^0.5
alpha = (1 ? e^2) . {[sin(lat) / (1 ? e^2 sin^2(lat))] ? [1/(2e)] . ln [(1 ? e sin(lat)) / (1 + e sin(lat))]}
alphaO = (1 ? e^2) . {[sin(latO) / (1 ? e^2 sin^2(latO))] ? [1/(2e)] . ln [(1 ? e sin(latO)) / (1 + e sin(latO))]}
alpha1 = (1 ? e^2) . {[sin(lat1) / (1 ? e^2 sin^2(lat1))] ? [1/(2e)] . ln [(1 ? e sin(lat1)) / (1 + e sin(lat1))]}
alpha2 = (1 ? e^2) . {[sin(lat2) / (1 ? e^2 sin^2(lat2))] ? [1/(2e)] . ln [(1 ? e sin(lat2)) / (1 + e sin(lat2))]}
The reverse formulas to derive the geodetic latitude and longitude of a point from its Easting and Northing values are:
lat = ß' + (e^2/3 + 31e^4/180 + 517e^6/5040) . sin 2ß'] + [(23e^4/360 + 251e^6/3780) . sin 4ß'] + [(761e^6/45360) . sin 6ß']
lon = lonO + (theta / n)
where
ß' = asin(alpha' / {1 ? [(1 ? e^2) / (2 . e)] . ln [(1 ? e) / (1 + e)]
alpha' = [C ? (rho^2 . N^2 / a^2)] / n
rho = {(E ? EF)^2 + [rhoO ? (N ? NF)]^2 }^0.5
theta = atan [(E ? EF) / [rhoO ? (N ? NF)]
and C, n and rhoO are as in the forward equations.
2
2
50
EPSG guidance note number 7.
1999-09-09
false
The latitude of the point which is not the natural origin and at which grid coordinate values false easting and false northing are defined.
http://www.opengis.net/def/parameter/EPSG/0/8821
Latitude of false origin
-154
EPSG guidance note number 7.
1999-09-09
false
The longitude of the point which is not the natural origin and at which grid coordinate values false easting and false northing are defined.
http://www.opengis.net/def/parameter/EPSG/0/8822
Longitude of false origin
55
EPSG guidance note number 7.
2009-06-02
true
false
For a conic projection with two standard parallels, this is the latitude of one of the parallels of intersection of the cone with the ellipsoid. It is normally but not necessarily that nearest to the pole. Scale is true along this parallel.
http://www.opengis.net/def/parameter/EPSG/0/8823
Latitude of 1st standard parallel
65
EPSG guidance note number 7.
2009-06-02
true
false
For a conic projection with two standard parallels, this is the latitude of one of the parallels at which the cone intersects with the ellipsoid. It is normally but not necessarily that nearest to the equator. Scale is true along this parallel.
http://www.opengis.net/def/parameter/EPSG/0/8824
Latitude of 2nd standard parallel
0
EPSG guidance note number 7.
1999-09-09
false
The easting value assigned to the false origin.
http://www.opengis.net/def/parameter/EPSG/0/8826
Easting at false origin
0
EPSG guidance note number 7.
1999-09-09
false
The northing value assigned to the false origin.
http://www.opengis.net/def/parameter/EPSG/0/8827
Northing at false origin
geographic 2D
2007-01-19
true
false
http://www.opengis.net/def/crs/EPSG/0/4269
NAD83
This CRS includes longitudes which are POSITIVE EAST. The adjustment included connections to Greenland and Mexico but the system has not been adopted there. Except in Alaska, for applications with an accuracy of better than 1m replaced by NAD83(HARN).
North America - onshore and offshore: Canada - Alberta; British Columbia; Manitoba; New Brunswick; Newfoundland and Labrador; Northwest Territories; Nova Scotia; Nunavut; Ontario; Prince Edward Island; Quebec; Saskatchewan; Yukon. Puerto Rico. United States (USA) - Alabama; Alaska; Arizona; Arkansas; California; Colorado; Connecticut; Delaware; Florida; Georgia; Hawaii; Idaho; Illinois; Indiana; Iowa; Kansas; Kentucky; Louisiana; Maine; Maryland; Massachusetts; Michigan; Minnesota; Mississippi; Missouri; Montana; Nebraska; Nevada; New Hampshire; New Jersey; New Mexico; New York; North Carolina; North Dakota; Ohio; Oklahoma; Oregon; Pennsylvania; Rhode Island; South Carolina; South Dakota; Tennessee; Texas; Utah; Vermont; Virginia; Washington; West Virginia; Wisconsin; Wyoming. US Virgin Islands. British Virgin Islands.
167.65
-47.74
14.92
86.46
OGP
2014-05-01
false
false
http://www.opengis.net/def/area/EPSG/0/1350
North America - NAD83
Area crosses 180-degree meridian.
Geodetic survey.
ellipsoidal
OGP
2008-06-23
false
http://www.opengis.net/def/cs/EPSG/0/6422
Ellipsoidal 2D CS. Axes: latitude, longitude. Orientations: north, east. UoM: degree
Coordinates referenced to this CS are in degrees. Any degree representation (e.g. DMSH, decimal, etc.) may be used but that used must be declared for the user by the supplier of data. Used in geographic 2D coordinate reference systems.
http://www.opengis.net/def/axis/EPSG/0/106
Lat
north
http://www.opengis.net/def/axis/EPSG/0/107
Long
east
geodetic
2008-04-11
false
http://www.opengis.net/def/datum/EPSG/0/6269
North American Datum 1983
Although the 1986 adjustment included connections to Greenland and Mexico, it has not been adopted there. In Canada and US, replaced NAD27.
Topographic mapping.
Origin at geocentre.
1986-01-01
Cartesian
OGP
2001-04-29
false
http://www.opengis.net/def/cs/EPSG/0/4499
Cartesian 2D CS. Axes: easting, northing (X,Y). Orientations: east, north. UoM: m.
Used in projected and engineering coordinate reference systems.
http://www.opengis.net/def/axis/EPSG/0/41
X
east
http://www.opengis.net/def/axis/EPSG/0/42
Y
north