projected
Scientific Committee for Antarctic Research (SCAR) Geospatial Information Group.
2005-04-14
true
false
http://www.opengis.net/def/crs/EPSG/0/3209
WGS 84 / SCAR IMW SQ21-22
Antarctica - 64°S to 68°S and 60°W to 48°W.
-60
-48
-68
-64
Scientific Committee for Antarctic Research
2008-06-23
false
false
http://www.opengis.net/def/area/EPSG/0/2996
Antarctica - 64°S to 68°S, 60°W to 48°W (SQ21-22)
Medium scale studies and topographic mapping.
conversion
Scientific Committee for Antarctic Research (SCAR) Geospatial Information Group.
2005-04-14
true
false
64
40
S
67
20
S
http://www.opengis.net/def/coordinateOperation/EPSG/0/17209
SCAR IMW SQ21-22
After: Sievers, J. and H. Bennat (1989). "Reference systems of maps and geographic information systems of Antarctica." Antarctic Science 1(4): 351-362.
Antarctica - 64°S to 68°S and 60°W to 48°W.
-60
-48
-68
-64
Scientific Committee for Antarctic Research
2008-06-23
false
false
http://www.opengis.net/def/area/EPSG/0/2996
Antarctica - 64°S to 68°S, 60°W to 48°W (SQ21-22)
Medium scale studies and topographic mapping.
Bureau International des Poids et Mesures (BIPM), www.bipm.org
2018-05-29
true
false
http://www.opengis.net/def/uom/EPSG/0/9001
metre
SI base unit for length.
length
0
EPSG guidance note #7-2, http://www.epsg.org
2018-08-29
true
false
true
For Projected Coordinate System NAD27 / Texas South Central
Parameters:
Ellipsoid Clarke 1866, a = 6378206.400 metres = 20925832.16 US survey feet
1/f = 294.97870
then e = 0.08227185 and e^2 = 0.00676866
First Standard Parallel 28°23'00"N = 0.49538262 rad
Second Standard Parallel 30°17'00"N = 0.52854388 rad
Latitude False Origin 27°50'00"N = 0.48578331 rad
Longitude False Origin 99°00'00"W = -1.72787596 rad
Easting at false origin 2000000.00 US survey feet
Northing at false origin 0.00 US survey feet
Forward calculation for:
Latitude 28°30'00.00"N = 0.49741884 rad
Longitude 96°00'00.00"W = -1.67551608 rad
first gives :
m1 = 0.88046050 m2 = 0.86428642
t = 0.59686306 tF = 0.60475101
t1 = 0.59823957 t2 = 0.57602212
n = 0.48991263 F = 2.31154807
r = 37565039.86 rF = 37807441.20
theta = 0.02565177
Then Easting E = 2963503.91 US survey feet
Northing N = 254759.80 US survey feet
Reverse calculation for same easting and northing first gives:
theta' = 0.025651765 r' = 37565039.86
t' = 0.59686306
Then Latitude = 28°30'00.000"N
Longitude = 96°00'00.000"W
http://www.opengis.net/def/method/EPSG/0/9802
Lambert Conic Conformal (2SP)
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 Easting and Northing coordinates of a point with geographical coordinates (lat,lon) the formulas for the one standard parallel case are:
E = EF + r sin(theta)
N = NF + rF - r cos(theta)
where
m = cos(lat)/(1 - e^2 sin^2(lat))^0.5 for m1, lat1, and m2, lat2 where lat1 and lat2 are the latitudes of the two standard parallels.
t = tan(pi/4 - lat/2)/[(1 - e sin(lat))/(1 + e sin(lat))]^(e/2) for t1, t2, tF and t using lat1, lat2, latF and lat respectively.
n = (loge(m1) - loge(m2))/(loge(t1) - loge(t2))
F = m1/(n t1^n)
r = a F t^n for rF and r, where rF is the radius of the parallel of latitude of the false origin.
theta = n(lon - lon0)
The reverse formulas to derive the latitude and longitude of a point from its Easting and Northing values are:
lat = pi/2 - 2arctan{t'[(1 - esin(lat))/(1 + esin(lat))]^(e/2)}
lon = theta'/n +lon0
where
r' = +/-[(E - EF)^2 + {rF - (N - NF)}^2]^0.5 , taking the sign of n
t' = (r'/(aF))^(1/n)
theta' = atan2 [(E- EF),(rF - (N- NF))]
(see implementation notes in GN7-2 preface for atan2 convention)
and n, F, and rF are derived as for the forward calculation.
Note that the formula for lat requires iteration. First calculate t' and then a trial value for lat using
lat = ?/2-2atan(t'). Then use the full equation for lat substituting the trial value into the right hand side of the equation. Thus derive a new value for lat. Iterate the process until lat does not change significantly. The solution should quickly converge, in 3 or 4 iterations.
-90
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
-54
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
-64.666666666667
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
-67.333333333333
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
EPSG. See 3D CRS for original information source.
2007-08-27
true
false
http://www.opengis.net/def/crs/EPSG/0/4326
WGS 84
World.
-180
180
-90
90
OGP
2001-06-05
false
false
http://www.opengis.net/def/area/EPSG/0/1262
World
Horizontal component of 3D system. Used by the GPS satellite navigation system and for NATO military geodetic surveying.
ellipsoidal
OGP
2015-05-22
true
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
Lon
east
geodetic
NIMA TR8350.2 June 2004 revision. http://earth-info.nga.mil/GandG/publications/tr8350.2/tr8350_2.html and
http://gis-lab.info/docs/nima-tr8350.2-addendum.pdf. Also NGA.STND.0036_1.0.0_WGS84 of 2014-07-08.
2017-07-14
true
false
http://www.opengis.net/def/datum/EPSG/0/6326
World Geodetic System 1984
EPSG::6326 has been the then current realization. No distinction is made between the original and subsequent (G730, G873, G1150, G1674 and G1762) WGS 84 frames. Since 1997, WGS 84 has been maintained within 10cm of the then current ITRF.
Satellite navigation.
Defined through a consistent set of station coordinates. These have changed with time: by 0.7m on 1994-06-29 (G730), a further 0.2m on 1997-01-29 (G873), 0.06m on 2002-01-20 (G1150), 0.2m on 2012-02-08 (G1674) and 0.02m on 2013-10-16 (G1762).
Cartesian
OGP
2001-04-29
false
http://www.opengis.net/def/cs/EPSG/0/4400
Cartesian 2D CS. Axes: easting, northing (E,N). Orientations: east, north. UoM: m.
Used in projected and engineering coordinate reference systems.
http://www.opengis.net/def/axis/EPSG/0/1
E
east
http://www.opengis.net/def/axis/EPSG/0/2
N
north