POSC Specifications
Version 2.2.2		 Epicentre Standard Values
local_spatial_coordinate_system

local_spatial_coordinate_system

Changes Document
Standard Instance Values

identifier coordinate _system _axis description ref _coordinate _system _constraint source _reference source version status
  vertical _depth _system _axis .description   ref _coordinate _system _constraint .name ref _source _reference .ref _source .name ref _source .name ref _epicentre _version .name  
ODN ODN axis United Kingdom - Great Britain elevation EPSG POSC 2.2 current
N60 N60 axis Finland elevation EPSG POSC 2.2 current
NGVD29 NGVD29 axis United States elevation EPSG POSC 2.2 current
NAVD88 NAVD88 axis Canada, United States elevation EPSG POSC 2.2 current
Yellow Sea Yellow Sea axis China elevation EPSG POSC 2.2 current
Baltic Baltic axis Armenia, Azerbaijan, Belarus, Estonia, Georgia, Kazakstan, Kirgizstan, Latvia, Lithuania, Moldavia, Russia, Tadzhikistan, Turkmenistan, Ukraine, Uzbekistan elevation EPSG POSC 2.2 current
Caspian Caspian d axis Azerbaijan - offshore, Kazakhstan - offshore, Russia - Caspian Sea, Turkmenistan - offshore" vertical depth EPSG POSC 2.2.1 current
NGF - Lallemand NGF - Lallemand axis France elevation EPSG POSC 2.2.1 current
NGF - IGN69 NGF - IGN69 axis France elevation EPSG POSC 2.2.1 current
NGF - IGN78 NGF - IGN78 axis France elevation EPSG POSC 2.2.1 current
RPN RPN axis Switzerland elevation EPSG POSC 2.2 current
NAP NAP axis Netherlands elevation EPSG POSC 2.2 current
Oostende Oostende axis Belgium elevation EPSG POSC 2.2 current
AHD AHD axis Australia (New South Wales; Northern Territories; Queensland; South Australia; Western Australia; Victoria) elevation EPSG POSC 2.2 current
AHD (Tasmania) AHD (Tasmania) axis Australia - Tasmania elevation EPSG POSC 2.2 current
CVD28 CVD28 axis Canada elevation EPSG POSC 2.2 current
Piraeus Piraeus axis Greece elevation EPSG POSC 2.2 current
RH70 RH70 axis Sweden elevation EPSG POSC 2.2.1 current

local_spatial_coordinate_system

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identifier coordinate _system _axis description ref _coordinate _system _constraint source _reference source version status
Maputo Maputo axis Mozambique elevation EPSG POSC 2.2.2 current
NGF NGF axis France elevation EPSG POSC 2.2.1 deprecated

local_spatial_coordinate_system

identifier coordinate _system _axis description ref _coordinate _system _constraint source version status
  vertical _depth _system _axis .description   ref _coordinate _system _constraint .name ref _source .name ref _epicentre _version .name  
subsea tvd subsea tvd axis This coordinate system is measured with depths negative downward, and with sea level as the zero point. Note that this coordinate system is the same as sea level elevation, but this is generally used for depths. elevation POSC 2.1 current
sea level elevation sea level elevation axis This coordinate system is measured positive upward from mean sea level. Note that this coordinate system is the same as subsea tvd, but this is generally used for elevations. elevation POSC 2.1 current
tvd tvd axis This coordinate system is measured positive downward. Locations must point to the optional vertex in order to specify the origin of the tvd (true vertical depth) axis. vertical depth POSC 2.1 current
tvd from sea level tvd from sea level axis This coordinate system is measured positive downward, referenced from the geoid mean sea level. vertical depth POSC 2.1 current
unknown vertical unknown vertical axis This coordinate system is measured positive downward. There is no defined reference. It is unknown whether the coordinate system is measured depth or true vertical depth. vertical depth POSC 2.1 current

local_spatial_coordinate_system

identifier coordinate _system _axis description ref _coordinate _system _constraint source version status
  measured _depth _system _axis .description   ref _coordinate _system _constraint .name ref _source .name ref _epicentre _version .name  
measured depth measured depth axis This coordinate system is used for measured depths. Locations must point to the optional vertex in order to specify the origin of the measured depth axis. measured depth system POSC 2.1 current

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