Rooflines of buildings from 2008 Axis Study aerial survey and updated with architectural files and aerial imagery. Original data is from CAD converted to shapefiles. Building outlines are added upon construction completion with field verification.

,The original building outlines were created from the 2005 Pictometry aerial imagery. The Building Class field was added from the 2011 Community Basemap project and the type 'apartment' was added to that domain in 2011. New building outlines were acquired from the 2011-2012 Pictometry flight and replaced the whole layer joining previous attribute information where possible. Building outlines and change analysis were completed again with the Pictometry flight in 2014. Building outlines and change analysis were completed with the Pictometry flight in 2016. Building outlines and change analysis were completed with the Pictometry flight in 2018. Building outlines and change analysis were completed with the Pictometry flight in 2020. The latest building outlines were created from the February 2022 Nearmap image capture using the Nearmap AI model. Change detection is no longer captured nor are decks. The layer's schema was changed to mirror the new capture method. Building classifications are 1=General/Residential, 2=Government, 3=Medical, 4=Education, 5=Transportation, 6=Commercial, 7=Religious, 8=Recreation, 9=Cultural/Heritage, 10=Hospitality, 11=Airport, 12=Industrial, 13=CommunityCenter, 14=Apartment,