Commerce used a combination of methods to identify possible covered commercial buildings after receiving feedback from stakeholders that county assessor data did not always contain the information needed to accomplish this task.
They created county-specific Geographic Information System layers showing possible covered commercial buildings and their estimated gross floor area using available Light Detection and Ranging (LIDAR) data.
Buildings can span multiple parcels, and our visual identification method does not allow us to see if there are internal connections between structures on adjoining parcels.