According to the Council on Tall Buildings and Urban Habitat (CTBUH), there are three official categories for measuring the height of a building: 1-Height to Architectural Top (the one used to officially rank towers by height), 2-Height to Highest Occupied Floor, 3-Height to Tip.
Definitions:
"Height to Architectural Top" - Height as measured from the level of the lowest, significant, open-air, pedestrian entrance to the architectural top of a building, including spires, but not including antennae, signage, flag poles or other functional-technical equipment.
"Height to Highest Occupied Floor" - Height as measured from the level of the lowest, significant, open-air, pedestrian entrance to the finished floor level of the highest occupied floor within a building.
"Height to Tip" - Height as measured from the level of the lowest, significant, open-air, pedestrian entrance to the highest point of the building, irrespective of material or function of the highest element (i.e., including antennae, flagpoles, signage, and other functional-technical equipment).
Having said that, I am not sure how The Independent has been measured to obtain the current 688' height.
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AUSTIN (City): 993,588 +3.30% - '20-'24 | AUSTIN MSA (5 counties): 2,550,637 +11.70% - '20-'24
SAN ANTONIO (City): 1,526,656 +6.41% - '20-'24 | SAN ANTONIO MSA (8 counties): 2,763,006 +8.01% - '20-'24
AUS-SAT REGION (MSAs/13 counties): 5,313,643 +9.75% - '20-'24 | *SRC: US Census*
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