Urban Tree Canopy Assessment: Project Summary

Mercer Island, Washington

Mercer Island’s urban forest is a valuable asset that provides residents and visitors with many ecological, environmental, and community benefits. This assessment analyzed the City’s urban tree canopy (UTC), possible planting area (PPA), and change in UTC over a 10-year period (aerial imagery from 2007-2017). The results provide baseline data to develop strategies to protect and expand Mercer Island’s trees and natural areas during planning and development. The maps and project report help to concentrate efforts in areas where needs are greatest, tree planting space is available, and benefits can be realized. 

Key Insights

Total Study Area Acres

Acres of Plantable Space

Tree Canopy