The interactive built: LA map (via CityLab) uses information from the Los Angeles County Assessor's office and the LA County GIS Data Portal and shows every building in LA County, color coded by age; hovering over a structure on the map reveals the specific year it was built. Don't miss clicking the stopwatch icon, which starts with pre-1909 buildings and slowly adds decade after decade of construction and expansion until every structure is represented. It's like watching the city be built in just a few seconds.
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