Latitude-longitude-height Service
Query Parameter
Description
Latitude in decimal degrees or degrees-minutes-seconds(DMS) format; if DMS format is used, prefix the value with a hemisphere designator (N or S) and use DDMMSS.ssssss format; decimal seconds are optional.
Example: decimal degrees: 40.75 DMS format N404500.0
Longitude in decimal degrees or degrees-minutes-seconds(DMS) format; if DMS format is used, prefix the value with a hemisphere designator (E or W) and use DDDMMSS.ssssss format; decimal seconds are optional. For decimal degrees, negative west longitude convention is used.
Example: decimal degrees: -80.75 DMS format W0804500.0
Ellipsoid height in meters; defaults to undefined if the parameter is not used. Combined factors and XYZ are not returned, if the parameter is not used
Datum of input coordinate;to be chosen from Regional Datums defined above; not required for coordinates outside the regions defined above
Datum of output coordinate;to be chosen from Regional Datums defined above; not required for coordinates outside the regions defined above
A 4-digit SPC zone to be used for SPC conversion, where applicable; SPC zone is automatically determined based on a given lat-long; you may optionally override this by specifying your own 4-digit SPC zone
A 2-digit UTM zone to be used for UTM conversion; UTM zone is automatically determined based on a given lat-long; you may optionally override this by specifying your own 2-digit UTM zone
Equatorial radius in meters; needed for an international coordinate outside the regions defined above
Inverse of flattening; needed for an international coordinate outside the regions defined above
Geopotential Datum of input orthometric height; to be chosen from Regional Geopotential Datums defined above
Geopotential Datum of output orthometric height; to be chosen from Regional Geopotential Datums defined above
Orthometric height chosen for transformation
* Required Field
** Optional Field, to override defaults
Examples:
Most common pattern:
https://geodesy.noaa.gov/api/ncat/llh?lat=40.0&lon=-80.0&eht=100.0&inDatum=nad83(1986)
&outDatum=nad83(2011)
Override default SPC zone:
https://geodesy.noaa.gov/api/ncat/llh?lat=40.0&lon=-80.0&inDatum=nad83(1986)&outDatum=nad83(2011)
&spcZone=3701
Override default UTM zone:
https://geodesy.noaa.gov/api/ncat/llh?lat=40.0&lon=-80.0&inDatum=nad83(1986)&outDatum=nad83(2011)
&utmZone=16
International coordinate:
https://geodesy.noaa.gov/api/ncat/llh?lat=-33.8688&lon=151.2093&a=6378160.0&invf=298.25
