A vertical altitude bound with its reference datum. Used to represent airspace floor and ceiling values as sourced from FAA NASR data without silently converting AGL values that would require terrain elevation data.
Reference datum that determines how valueFt should be interpreted.
Altitude value in feet. For SFC reference this is 0.
A vertical altitude bound with its reference datum. Used to represent airspace floor and ceiling values as sourced from FAA NASR data without silently converting AGL values that would require terrain elevation data.