projected
Instituto Geografico Agustin Codazzi (IGAC).
2013-05-19
true
false
http://www.opengis.net/def/crs/EPSG/0/6272
MAGNA-SIRGAS / Tunja urban grid
Colombia - Tunja city.
-73.39
-73.3
5.5
5.61
OGP
2014-05-01
true
false
http://www.opengis.net/def/area/EPSG/0/4131
Colombia - Tunja city
Large scale topographic mapping, cadastral and engineering survey.
conversion
Instituto Geografico Agustin Codazzi (IGAC).
2013-05-18
true
false
5
32
3.10106
N
73
21
6.98004
W
http://www.opengis.net/def/coordinateOperation/EPSG/0/6240
Tunja urban grid
Colombia - Tunja city.
-73.39
-73.3
5.5
5.61
OGP
2014-05-01
true
false
http://www.opengis.net/def/area/EPSG/0/4131
Colombia - Tunja city
Large scale topographic mapping, cadastral and engineering survey.
EPSG guidance note #7-2, http://www.epsg.org
2013-05-20
true
false
true
For Projected Coordinate Reference System: MAGNA-SIRGAS / Bogota urban grid
Parameters:
Ellipsoid: GRS 1980 a = 6378137.0 metres 1/f = 298.2572221
then e^2 = 0.006694380
Latitude of natural origin = 4°40'49.75"N = 0.081689893 rad
Longitude of natural origin = 74°08'47.73"W = -1.294102154 rad
False easting = 92334.879 metres
False northing = 109320.965 metres
Height of projection origin = 2550.000 metres
Forward calculation for:
Latitude = 4°48'00.000"N = 0.083775804 rad
Longitude = 74°15'00.000"W = -1.295906970 rad
First calculate constants for the projection:
rho_O = 6335862.944
nu_O = 6378279.154
A = 1.000399794
B = 1.012970E-15
C = 1.000399803
D = 6338413.114
Then
nu = 6378286.489
G = 1.000402470
and then
E = 80859.033m
N = 122543.174m
Reverse calculation for the same Easting and Northing (80859.033E, 122543.174N) first gives:
Latitude = 4°48'00.000"N
then nu = 6378286.489
and Longitude = 74°15'00.000"W
http://www.opengis.net/def/method/EPSG/0/1052
Colombia Urban
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 forward conversion from latitude and longitude to easting and northing is:
E = FE + A * nu * cos(lat) * (lon ? lonO)
N = FN + G * rhoO * [(lat ? latO) + {B *(lon ? lonO)^2 * nu^2 * cos^2(lat)}]
where
latO, lonO and hO are the latitude, longitude and height of the projection origin,
rho is the radius of curvature of the ellipsoid in the plane of the meridian at latitude lat, rhoO at latitude latO, and rhoM at mid-latitude (latO + lat)/2; rho = a(1 ? e^2)/(1 ? e^2 * sin^2(lat))^1.5 for lat, latO and latM
nu is the radius of curvature of the ellipsoid perpendicular to the meridian at latitude lat with nuO at latitude latO; nu = a /(1 ? e^2 * sin^2(lat))^0.5 for lat and latO
e is the eccentricity of the ellipsoid and e^2 = (a^2 ? b^2)/a^2 = 2f ? f^2
a is the ellipsoidal semi-major and 1/f is the inverse flattening
A = 1 + hO/nuO
B = tan(latO) / 2 * rhoO * nuO
G = 1 + hO/latM
The reverse conversion from easting and northing to latitude and longitude is:
lat = latO + [(N ? FN) / D] ? B [(E?FE) / C]^2
lon = lonO + (E ? FE) / C *nu * cos(lat)
where
B is as in the forward conversion,
C = 1 + hO/a
D = rhoO * (1 + hO/a(1-e^2))
5.534194738889
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
-73.3519389
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
1080514.910
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
1103772.028
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
2800.0
EPSG guidance note number 7.
2013-05-18
true
false
For Colombia urban grids, the height of the projection plane at its origin.
http://www.opengis.net/def/parameter/EPSG/0/1039
Projection plane origin height
geographic 2D
EPSG. See 3D CRS for original information source.
2011-01-25
true
false
http://www.opengis.net/def/crs/EPSG/0/4686
MAGNA-SIRGAS
Replaces Bogota 1975 (CRS code .4218).
Colombia - onshore and offshore. Includes San Andres y Providencia, Malpelo Islands, Roncador Bank, Serrana Bank and Serranilla Bank.
-84.77
-66.87
-4.23
15.51
ISO 3166 Maintenance Agency. ftp://ftp.fu-berlin.de/pub/doc/iso
2014-05-01
false
false
http://www.opengis.net/def/area/EPSG/0/1070
Colombia
CO
COL
170
Horizontal component of 3D system.
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
Instituto Geografico Agustin Codazzi (IGAC) publication "Aspectos prácticos de la adopción del Marco Geocéntrico Nacional de Referencia MAGNA-SIRGAS como datum oficial de Colombia". http://www.igac.gov.co/MAGNAWEB/DocumentosMAGNA.htm
2011-01-25
true
false
http://www.opengis.net/def/datum/EPSG/0/6686
Marco Geocentrico Nacional de Referencia
Densification of SIRGAS 1995 within Colombia. Replaces Bogota 1975 (datum code 6218).
Geodetic survey.
ITRF94 at epoch 1995.4. Bogota observatory coordinates: Latitude: 4°35'46.3215"N, longitude: 74°04'39.0285"W (of Greenwich).
2004-01-01
Cartesian
OGP
2001-04-29
false
http://www.opengis.net/def/cs/EPSG/0/4500
Cartesian 2D CS. Axes: northing, easting (N,E). Orientations: north, east. UoM: m.
Used in projected and engineering coordinate reference systems.
http://www.opengis.net/def/axis/EPSG/0/44
N
north
http://www.opengis.net/def/axis/EPSG/0/43
E
east