City of Philadelphia Spatial Data(PASDA, Pennsylvania Spatial Data Archive). Philadelphia County aerial orthoimagery covering 1996, 2000, 2004, 2005, 2008, 2009, 2010, 2011, 2012, 2014, 2015, 2016, 2017, 2018, 2019, 2020, and 2022 (some years include leaf-on imagery for tree coverages). DEM and LiDAR topographic contour data for 2004, 2008, 2010, 2015, 2018, and 2022. Land cover raster imagery for 2008 and 2018. Assorted other spatial datasets.