• nc:LocationHeightMeasureType (e.g. mo:AltitudeMeasure)
• mo:VerticalAngularMeasureType (e.g. mo:SectorElevationAngle)

• Nothing

Can be replaced with:

• nc:LocationHeightVerticalDatumText
      A vertical datum system used to designate the reference point for a height measurement.
• nga:VerticalDatumCode
      A code that describes the relationship of a two- or three-dimensional coordinate system to the shape of the Earth.

• mo:AltitudeMeasure (of nc:LocationHeightMeasureType)
      A vertical elevation of an object above a surface (as sea level or land) of a planet or natural satellite.
• mo:ElevationMeasure (of nc:LocationHeightMeasureType)
      A height above a fixed reference point, most commonly a reference geoid, a mathematical model of the Earth's sea level as an equipotential gravitational surface.
• nc:LocationAltitude (of nc:LocationHeightMeasureType)
      A measurement of the height or position of a location above a certain reference.
• nc:LocationDepth (of nc:LocationHeightMeasureType)
      A measure of the depth of a location relative to a reference.
• nc:LocationElevation (of nc:LocationHeightMeasureType)
      A measure of the distance of a point on the Earth from a reference point.
• mo:SectorElevationAngle (of mo:VerticalAngularMeasureType)
      An elevation angle of a sector.
• mo:VerticalAngularMeasure (of mo:VerticalAngularMeasureType)
      A measure of an angle in the vertical plane.

• Nothing