Bernard,
This text works for me.
-Marc-
Here's the revised text for Section 2.4.3:
2.4.3. Altitude in Floors (AType = 2)
A value of two for Altitude Type indicates that the Altitude value is
measured in floors. Since altitude in meters may not be known within
a building, a floor indication may be more useful. For AType = 2,
the Altitude value is expressed as a 30 bit, fixed point, twos
complement integer with 22 integer bits and 8 fractional bits.
This value is relevant only in relation to a building; the value is
relative to the ground level of the building. Floors located below
ground level are represented by negative values. In some buildings
it might not be clear which floor is at ground level or an
intermediate floor might be hard to identify as such. Determining
what floor is at ground level and what constitutes a sub-floor as
opposed to an naturally numbered floor is left to local
interpretation.
Larger values represent floors that are farther away from floor 0
such that:
- if positive, the floor value is farther above the ground floor.
- if negative, the floor value is farther below the ground floor.
Non-integer values can be used to represent intermediate or sub-
floors, such as mezzanine levels. Example: a mezzanine between floor
1 and floor 2 could be represented as a value of 1.25. Example:
mezzanines between floor 4 and floor 5 could be represented as values
of 4.5 and 4.75.
