projected
Yap State Code, Title 20, Chapter 5. http://www.fsmlaw.org/yap/code/title20/T20_Ch05.htm
2005-05-21
true
false
http://www.opengis.net/def/crs/EPSG/0/3295
Guam 1963 / Yap Islands
Federated States of Micronesia - Yap Islands.
137.99
138.27
9.39
9.69
OGP
2014-05-01
false
false
http://www.opengis.net/def/area/EPSG/0/3108
Micronesia - Yap Islands
Public reference, land and photgrammetric survey, mapping.
conversion
Yap State Code, Title 20, Chapter 5. http://www.fsmlaw.org/yap/code/title20/T20_Ch05.htm
2005-05-21
true
false
9
32
48.15
N
138
10
7.48
E
http://www.opengis.net/def/coordinateOperation/EPSG/0/15399
Yap Islands
Origin is station YAP SECOR AMS 1965.
Federated States of Micronesia - Yap Islands.
137.99
138.27
9.39
9.69
OGP
2014-05-01
false
false
http://www.opengis.net/def/area/EPSG/0/3108
Micronesia - Yap Islands
Public reference, land and photgrammetric survey, mapping.
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
US Geological Survey Professional Paper 1395; "Map Projections - A Working Manual"; J. Snyder.
2006-03-31
false
true
See information source or EPSG Guidance Note 7.
http://www.opengis.net/def/method/EPSG/0/9832
Modified Azimuthal Equidistant
Modified form of Oblique Azimuthal Equidistant projection method developed for Polynesian islands. For the distances over which these projections are used (under 800km) this modification introduces no significant error.
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.
First calculate a constant for the projection:
nu_O = a /(1 ? e^2 sin^2(latO))^0.5
Then the forward conversion from latitude and longitude is given by:
nu = a /(1 ? e^2 sin^2(lat))^0.5
psi = atan [(1 ? e^2) tan(lat) + e^2 * nu_O * sin(latO) / (nu * cos(lat))]
alpha = atan {sin (lon ? lonO) / [cos(latO) * tan(psi) ? sin(latO) * cos (lon ? lonO)]}
G = e sin(latO) / (1 ? e^2)^0.5
H = e cos(latO) * cos(alpha) / (1 ? e^2)^0.5
Then
if sin(alpha)) = 0, s = asin (cos(latO) * sin(psi) ? sin(latO) * cos(psi)) * SIGN(cos(alpha))
else s = asin [sin (lon ? lonO) * cos(psi) / sin(alpha))
and in either case
c = nu_O * s {[1 ? s^2 * H^2 (1 ? H^2) /6] + [(s^3/8)GH(1-2H^2)] + (s^4/120)[H^2(4-7H^2) ? 3G^2(1-7H^2)] ? [(s^5/48)GH]}
Then
E = FE + * sin(alpha)
N = FN + * cos(alpha)
For the reverse conversion from easting and northing to latitude and longitude:
c' = [(E FE)^2 + (N ? FN)^2]^0.5
alpha' = atan [(E ? FE) / (N ? FN)]
A = e^2 * cos^2(latO) * cos^2(alpha') / (1 ? e^2)
B 3e^2 * (1-A) * sin(latO) * cos(latO) * cos(alpha') / (1 ? e^2)
D = c'nu_O
J = D ? [A (1 + AD^3 / 6] ? [B (1 + 3A) D^4 / 24]
K = 1 ? (* J^2 / 2) ? (B *J^3 / 6)
psi' = asin (sin(latO) cos(J) + cos(latO) sin(J) cos(alpha'))
Then
lat = atan [(1 ? e^2 * K sin(latO) / sin(psi')) * tan(psi') / (1 ? e^2)]
lon = lonO + asin (sin(alpha') * sin(J) / cos(psi'))
2
2
9.546708333333
EPSG guidance note number 7.
1999-09-09
false
The latitude of the point from which the values of both the geographical coordinates on the ellipsoid and the grid coordinates on the projection are deemed to increment or decrement for computational purposes. Alternatively it may be considered as the latitude of the point which in the absence of application of false coordinates has grid coordinates of (0,0).
http://www.opengis.net/def/parameter/EPSG/0/8801
Latitude of natural origin
138.168744444444
Abbeviated as "CM".
Abbreviation for "Central Meridian".
EPSG guidance note number 7.
2002-06-22
false
The longitude of the point from which the values of both the geographical coordinates on the ellipsoid and the grid coordinates on the projection are deemed to increment or decrement for computational purposes. Alternatively it may be considered as the longitude of the point which in the absence of application of false coordinates has grid coordinates of (0,0). Sometimes known as "central meridian (CM)".
http://www.opengis.net/def/parameter/EPSG/0/8802
Longitude of natural origin
40000
This alias applies only in the case of projection methods which have an axis positive west, e.g. Transverse Mercator (South Orientated).
EPSG guidance note number 7.
2002-07-31
false
Since the natural origin may be at or near the centre of the projection and under normal coordinate circumstances would thus give rise to negative coordinates over parts of the mapped area, this origin is usually given false coordinates which are large enough to avoid this inconvenience. The False Easting, FE, is the value assigned to the abscissa (east or west) axis of the projection grid at the natural origin.
http://www.opengis.net/def/parameter/EPSG/0/8806
False easting
60000
This alias applies only in the case of projection methods which have an axis positive south, e.g. Transverse Mercator (South Orientated).
EPSG guidance note number 7.
2002-07-31
false
Since the natural origin may be at or near the centre of the projection and under normal coordinate circumstances would thus give rise to negative coordinates over parts of the mapped area, this origin is usually given false coordinates which are large enough to avoid this inconvenience. The False Northing, FN, is the value assigned to the ordinate (north or south) axis of the projection grid at the natural origin.
http://www.opengis.net/def/parameter/EPSG/0/8807
False northing
geographic 2D
National Geodetic Survey
2009-07-29
true
false
http://www.opengis.net/def/crs/EPSG/0/4675
Guam 1963
Replaced by NAD83(HARN) alias Guam Geodetic Network 1993 (CRS code 4152) from 1995.
Guam - onshore.
144.58
145.01
13.18
13.7
OGP
2014-05-01
false
false
http://www.opengis.net/def/area/EPSG/0/3255
Guam - onshore
Topographic mapping, engineering survey, cadastral 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
US National Geospatial Intelligence Agency (NGA). http://earth-info.nga.mil/
2008-06-24
false
http://www.opengis.net/def/datum/EPSG/0/6675
Guam 1963
Replaced by NAD83(HARN)
Topographic mapping.
Fundamental point: Tagcha. Latitude: 13°22'38.49"N, longitude: 144°45'51.56"E (of Greenwich).
1963-01-01
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