This operation converts geocentric coordinate values (X, Y, Z) to topocentric (E/East, N/North, U/Up) values. This is also sometimes known as the ECEF (Earth Centered Earth Fixed) to ENU conversion.
This operation converts geocentric coordinate values (X, Y, Z) to topocentric (E/East, N/North,
U/Up) values. This is also sometimes known as the ECEF (Earth Centered Earth Fixed) to ENU
conversion.
Topocentric coordinates are expressed in a frame whose East and North axis form a local tangent
plane to the Earth's ellipsoidal surface fixed to a specific location (the topocentric origin),
and the Up axis points upwards along the normal to that plane.
The built-in geodetic coordinates include MERIT, SGS85, GRS80, IAU76, GRS67, helmert,
WGS60, WGS66, WGS72, WGS84. It also supports customization of geodetic coordinate system through
ellipsoid Semi-major axis and reverse flattening of the ellipsoid.
- Input Coordinates : Enter geocentric coordinates XYZ or topocentric coordinates ENU. Use Comma-separated values, and enter one coordinate per line. Supports input of multiple lines. The geocentric coordinates format isX , Y , Z, the units is meters(m). The topocentric coordinates format is E , N , U, the unit is meters(m).
- Origin : The topocentric origin is a required parameter of the conversion, and can be expressed either as geocentric coordinates (X_0, Y_0 and Z_0) or as geographic coordinates (lat_0, lon_0, h_0).
- Ellipsoid : Select the ellipsoid definition, which supports user-defined ellipsoids.
- a : The semi-major axis of a custom ellipsoid, in meters (m). The value range is [6370000,6379999].
- rf : Reverse flattening of the ellipsoid, 1/f. The value range is [270,300].
- XYZ→ENU : Convert the input geocentric coordinate system coordinates (X, Y, Z) to topocentric coordinate system coordinates (E, N, U).
- ENU→XYZ : Convert the input topocentric coordinate system coordinates (E, N, U) to geocentric coordinate system coordinates (X, Y, Z) .
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Topocentric Origin Parameter :
Name Description Used by Unit X_0 Geocentric X value of the topocentric origin geocentric meter(m) Y_0 Geocentric Y value of the topocentric origin geocentric meter(m) Z_0 Geocentric Z value of the topocentric origin geocentric meter(m) lon_0 Longitude of topocentric origin geographic degree(°) lat_0 Latitude of topocentric origin geographic degree(°) h_0 Ellipsoidal height of topocentric origin geographic meter(m) - Open File : Support for opening UTF-8 encoded text files.
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This tool has a certain frequency limit, please use this tool reasonably.
Anonymous : 30/IP*Hour, Normal user : 30/Hour, VIP : 120/Hour, Senior VIP : 120/Hour.
Anonymous and normal users can only enter one set of coordinates at a time, and batch conversion is not supported. VIP and advanced VIP users support batch conversion. -
Built in ellipsoid parameters :
Name Semi-major axis(a) Reverse flattening(rf) MERIT 6378137.0 m 298.257 SGS85 6378136.0 m 298.257 GRS80 6378137.0 m 298.257222101 IAU76 6378140.0 m 298.257 GRS67 6378160.0 298.2471674270 helmert 6378200 m 298.3 WGS60 6378165.0 m 298.3 WGS66 6378145.0 m 298.25 WGS72 6378135.0 m 298.26 WGS84 6378137.0 m 298.257223563
