Modern geodetic reference frames: a latitude/longitude point defines a
geographic location on, above or below the earth’s surface, measured in
degrees from the equator and the International Reference Meridian (IRM) and metres above
the ellipsoid within a given Terrestrial Reference Frame at a
given epoch.
This is scratching the surface of complexities involved in high
precision geodesy, but may be of interest and/or value to those with less
demanding requirements. More information here and here.
Note WGS84(G730/G873/G1150) are coincident with ITRF at 10-centimetre
level, see also here. WGS84(G1674) and ITRF20014 / ITRF2008 ‘are
likely to agree at the centimeter level’, see also QPS/QINSy.
|
__all__ = _ALL_LAZY.trf
|
|
RefFrames =
|
|
RefFrames.ETRF2000
RefFrame(name='ETRF2000', epoch=2005,
ellipsoid=Ellipsoid(name='GRS80')
|
|
RefFrames.GDA2020
RefFrame(name='GDA2020', epoch=2020,
ellipsoid=Ellipsoid(name='GRS80')
|
|
RefFrames.GDA94
RefFrame(name='GDA94', epoch=1994, ellipsoid=Ellipsoid(name='GRS80')
|
|
RefFrames.ITRF2000
RefFrame(name='ITRF2000', epoch=1997,
ellipsoid=Ellipsoid(name='GRS80')
|
|
RefFrames.ITRF2005
RefFrame(name='ITRF2005', epoch=2000,
ellipsoid=Ellipsoid(name='GRS80')
|
|
RefFrames.ITRF2008
RefFrame(name='ITRF2008', epoch=2005,
ellipsoid=Ellipsoid(name='GRS80')
|
|
RefFrames.ITRF2014
RefFrame(name='ITRF2014', epoch=2010,
ellipsoid=Ellipsoid(name='GRS80')
|
|
RefFrames.ITRF91
RefFrame(name='ITRF91', epoch=1988, ellipsoid=Ellipsoid(name='GRS80')
|
|
RefFrames.ITRF93
RefFrame(name='ITRF93', epoch=1988, ellipsoid=Ellipsoid(name='GRS80')
|
|
RefFrames.NAD83
RefFrame(name='NAD83', epoch=1997, ellipsoid=Ellipsoid(name='GRS80')
|
|
RefFrames.WGS84g1150
RefFrame(name='WGS84g1150', epoch=2001,
ellipsoid=Ellipsoid(name='WGS84')
|
|
RefFrames.WGS84g1674
RefFrame(name='WGS84g1674', epoch=2005,
ellipsoid=Ellipsoid(name='WGS84')
|
|
RefFrames.WGS84g1762
RefFrame(name='WGS84g1762', epoch=2005,
ellipsoid=Ellipsoid(name='WGS84')
|