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1. Imagery 2013 - Tile Index: Allegheny County, Pennsylvania

2013. Allegheny County Division of Computer Services Geographic Information Systems Group. Tile Index - Orthophotos of Allegheny County, Pennsylvania - An orthoimage is remotely sensed image data that has been positionally corrected for c...

2. Imagery 2013: Allegheny County, Pennsylvania

2013. Allegheny County Division of Computer Services Geographic Information Systems Group. Orthophotos of Allegheny County, Pennsylvania - An orthoimage is remotely sensed image data that has been positionally corrected for camera lens di...

3. Landcover - Tree Canopy Change, Washington DC, 2006 - 2011

2013. Jarlath O'Neil-Dunne, Universit of Vermont Spatial Analysis Laboratory, Directory Universit of Vermont Spatial Analysis Laboratory. Change in the District of Columbias tree canopy estimated from 2011 leaf-on imagery and 2006 leaf-on imagery in conjunction with 2008 leaf-off LiDA...