projected
Defence Geographic Centre.
2006-08-14
true
false
http://www.opengis.net/def/crs/EPSG/0/3168
Kertau (RSO) / RSO Malaya (m)
Adopts metric conversion of 0.914398 metres per yard. See Kertau (RSO) / RSO Malaya (ch) (CRS code 3168) for Imperial version. Replaced by GDM2000 / Peninsula RSO (CRS code 3375).
Malaysia - West Malaysia onshore.
99.59
104.6
1.21
6.72
OGP
2014-05-01
false
false
http://www.opengis.net/def/area/EPSG/0/1690
Malaysia - West Malaysia - onshore
Large and medium scale topographic mapping and engineering survey.
conversion
Defence Geographic Centre
2010-11-02
true
false
4
N
102
15
E
323
1
32.8458
323
7
48.3685
http://www.opengis.net/def/coordinateOperation/EPSG/0/19872
Rectified Skew Orthomorphic Malaya Grid (metres)
Uses metric conversion factor of 0.914398 metres per yard exactly. If using Hotine Oblique Mercator (variant B) method (code 9815), Ec=472854.710m, Nc=442420.693m.
Malaysia - West Malaysia onshore.
99.59
104.6
1.21
6.72
OGP
2014-05-01
false
false
http://www.opengis.net/def/area/EPSG/0/1690
Malaysia - West Malaysia - onshore
Large and medium scale topographic mapping and engineering survey.
This was the method name used prior to October 2010.
EPSG guidance note #7-2, http://www.epsg.org
2010-11-02
true
false
true
For Projected Coordinate System Timbalai 1948 / R.S.O. Borneo (m)
Parameters:
Ellipsoid: Everest 1830 (1967 Definition)
a = 6377298.556 metres 1/f = 300.8017
then e = 0.081472981and e2 = 0.006637847
Latitude Projection Centre fc = 4°00'00"N = 0.069813170 rad
Longitude Projection Centre lc = 115°00'00"E = 2.007128640 rad
Azimuth of central line ac = 53°18'56.9537" = 0.930536611 rad
Rectified to skew gc= 53°07'48.3685" = 0.927295218 rad
Scale factor ko= 0.99984
False Eastings FE = 0.00 m
False Northings FN = 0.00 m
Forward calculation for:
Latitude lat = 5°23'14.1129"N = 0.094025313 rad
Longitude lon = 115°48'19.8196"E = 2.021187362 rad
B = 1.003303209 F = 1.072121256
A =6376278.686 H = 1.000002991
to = 0.932946976 go = 0.927295218
D = 1.002425787 lon0 = 1.914373469
D2 =1.004857458
uc =738096.09 vc =0.00
t = 0.910700729 Q = 1.098398182
S = 0.093990763 T = 1.004407419
V = 0.106961709 U = 0.010967247
v = -69702.787 u = 901334.257
Then Easting E = 679245.73 m
Northing N = 596562.78 m
Reverse calculations for same easting and northing first gives :
v? = -69702.787 u? =901334.257
Q? = 1.011028053
S? = 0.010967907 T? = 1.000060146
V? = 0.141349378 U? = 0.093578324
t? = 0.910700729 c = 0.093404829
Then Latitude = 5°23'14.113"N
Longitude = 115°48'19.820"E
http://www.opengis.net/def/method/EPSG/0/9812
Hotine Oblique Mercator (variant A)
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.
The following constants for the projection may be calculated :
B = {1 + [esq * cos^4(latc) / (1 - esq )]}^0.5
A = a * B * kc *(1 - esq )^0.5 / ( 1 - esq * sin^2(latc))
to = tan(pi/4 - latc/2) / ((1 - e*sin(latc)) / (1 + e*sin(latc)))^(e/2)
D = B (1 - esq)^0.5 / (cos(latc) * ( 1 - esq*sin^2(latc))^0.5)
if D < 1 to avoid problems with computation of F make D^2 = 1
F = D + (D^2 - 1)^0.5 * SIGN(latc)
H = F*(to)^B
G = (F - 1/F) / 2
gammao = asin(sin(alphac) / D)
lonO = lonc - (asin(G*tan(gammao))) / B
Forward case: To compute (E,N) from a given (lat,lon) :
t = tan(pi/4 - lat/2) / ((1 - e sin (lat)) / (1 + e sin (lat)))^(e/2)
Q = H / t^B
S = (Q - 1 / Q) / 2
T = (Q + 1 / Q) / 2
V = sin(B (lon - lonO))
U = (- V cos(gammao) + S sin(gammao)) / T
v = A ln((1 - U) / (1 + U)) / 2 B
u = A atan((S cos(gammao) + V sin(gammao)) / cos(B (lon - lonO))) / B
The rectified skew co-ordinates are then derived from:
E = v cos(gammac) + u sin(gammac) + FE
N = u cos(gammac) - v sin(gammac) + FN
Reverse case: Compute (lat,lon) from a given (E,N) :
v? = (E - FE) cos(gammac) - (N - FN) sin(gammac)
u? = (N - FN) cos(gammac) + (E - FE) sin(gammac)
Q? = e^- (B v ?/ A) where e is the base of natural logarithms.
S' = (Q? - 1 / Q?) / 2
T? = (Q? + 1 / Q?) / 2
V? = sin (B u? / A)
U? = (V? cos(gammac) + S? sin(gammac)) / T?
t? = (H / ((1 + U?) / (1 - U?))^0.5)^(1 / B)
chi = pi / 2 - 2 atan(t?)
lat = chi + sin(2chi).( e^2 / 2 + 5*e^4 / 24 + e^6 / 12 + 13*e^8 / 360) + sin(4*chi).( 7*e^4 /48 + 29*e^6 / 240 + 811*e8 / 11520) + sin(6chi).( 7*e^6 / 120 + 81*e8 / 1120) + sin(8chi).(4279 e^8 / 161280)
lon = lonO - atan ((S? cos(gammao) - V? sin(gammao)) / cos(B*u? / A)) / B
4
EPSG guidance note number 7.
1999-09-09
false
For an oblique projection, this is the latitude of the point at which the azimuth of the central line is defined.
http://www.opengis.net/def/parameter/EPSG/0/8811
Latitude of projection centre
102.25
EPSG guidance note number 7.
1999-09-09
false
For an oblique projection, this is the longitude of the point at which the azimuth of the central line is defined.
http://www.opengis.net/def/parameter/EPSG/0/8812
Longitude of projection centre
323.0257905
EPSG guidance note number 7.
1999-09-09
false
The azimuthal direction (north zero, east of north being positive) of the great circle which is the centre line of an oblique projection. The azimuth is given at the projection centre.
http://www.opengis.net/def/parameter/EPSG/0/8813
Azimuth of initial line
323.130102361111
EPSG guidance note number 7.
1999-09-09
false
The angle at the natural origin of an oblique projection through which the natural coordinate reference system is rotated to make the projection north axis parallel with true north.
http://www.opengis.net/def/parameter/EPSG/0/8814
Angle from Rectified to Skew Grid
0.99984
EPSG guidance note number 7.
1999-09-09
false
The factor by which the map grid is reduced or enlarged during the projection process, defined by its value at the projection center.
http://www.opengis.net/def/parameter/EPSG/0/8815
Scale factor on initial line
804670.24
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
0
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
Defence Geographic Centre.
2006-07-24
true
false
http://www.opengis.net/def/crs/EPSG/0/4751
Kertau (RSO)
Used only for metrication of RSO grid. See Kertau 1968 (CRS code 4245) for other purposes. Replaced by GDM2000 (CRS code 4742).
Malaysia - West Malaysia; Singapore.
99.59
104.6
1.13
6.72
OGP
2014-05-01
false
false
http://www.opengis.net/def/area/EPSG/0/1309
Asia - Malaysia (west) and Singapore
Metrication of penisula Malaya RSO grid.
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
Defence Geographic Centre.
2006-07-24
false
http://www.opengis.net/def/datum/EPSG/0/6751
Kertau (RSO)
Adopts metric conversion of 0.914398 metres per yard exactly. This is a truncation of the Sears 1922 ratio.
Metrication of RSO grid.
1969-01-01
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