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About Us

PhillyTreeMap is a web-based map database of trees in the greater Philadelphia region. The wiki-style database enables non-profits, government, volunteer organizations, and the general public to collaboratively create an accurate and informative inventory of the trees in their communities.   

PhillyTreeMap was built by Azavea, a Philadelphia-based software design and development firm specializing in Geographic Information Systems (GIS) technology, with funding from the United States Department of Agriculture (USDA). In 2010, Azavea was awarded a USDA Phase I Small Business Innovation Research (SBIR) grant to develop a prototype of new data management software that will assist communities with the inventory and maintenance of urban forests.

PhillyTreeMap is the result of that development. Developed based on the open source code originating from the Urban Forest Map project in San Francisco, PhillyTreeMap enables members of the public to join government and non-profit organizations in adding and updating information about trees in the greater Philadelphia region. With an accurate and up to date tree inventory, we can work more efficiently toward maintaining our urban forest and promoting green communities in Philadelphia.

This material is based upon work supported by the National Institute of Food and Agriculture, U.S. Department of Agriculture, under Agreement No. 2010-33610-20937 of the Small Business Innovation Research Grants Program. Any opinions, findings, and conclusions, or recommendations expressed in PhillyTreeMap.org are those of the partners or individuals and do not necessarily reflect the view of the U.S. Department of Agriculture.


Azavea Azavea is an award-winning geospatial analysis (GIS) software development firm specializing in the creation of location-based web and mobile solutions, as well as geospatial analysis services to enhance decision making. Azavea is committed to working on projects with a strong social value component in order to promote the emergence of more dynamic, vibrant, and sustainable communities. Each of Azavea’s projects, products and pro bono engagements showcases this commitment. Azavea is a certified B Corporation.

Pennsylvania Horticultural Society The Pennsylvania Horticultural Society (PHS) is a not-for-profit membership organization founded in 1827. Under the leadership of Drew Becher, PHS provides great events, activities and publications for novice gardeners, experienced horticulturists, and flower lovers of all ages. Our Mission: The Pennsylvania Horticultural Society motivates people to improve the quality of life and create a sense of community through horticulture.

Delaware   Valley Regional Planning  Commission The Delaware Valley Regional Planning Commission is dedicated to uniting the region's elected officials, planning professionals and the public with the common vision of making a great region even greater. Shaping the way we live, work and play, DVRPC builds consensus on improving transportation, promoting smart growth, protecting the environment, and enhancing the economy. We serve a diverse region of nine counties: Bucks, Chester, Delaware, Montgomery and Philadelphia in Pennsylvania; and Burlington, Camden, Gloucester and Mercer in New Jersey. DVRPC is the official metropolitan planning organization for the Greater Philadelphia Region - leading the way to a better future.

City of Philadelphia  Department of Parks and RecreationPhiladelphia Parks & Recreation promotes the wellbeing of the City, its citizens and visitors, by offering beautiful natural landscapes and parks, historically significant resources, high quality recreation centers and athletic programs, along with enriching cultural and environmental programs.

Code contributed by Urban Forest MapUrban Forest Map is a collaboration of government, nonprofits, businesses and you to map every tree in San Francisco. Our mission is to build technology that improves information sharing, communicates the value of the urban forest, and engages communities in creating greener, more livable urban environments.

Township of Lower MerionLower Merion Township is a first-class place to live, work, attend school, raise a family, and build a business. Lower Merion has placed a priority on managing progress while maintaining the beauty and history of the past. The residents of Lower Merion Township are intelligent and actively engaged in their local government, sharing a common passion to preserve the first-class qualities of their beloved communities.

Your turn

Our database of trees comes from public records and citizen foresters like you. Add a tree today and help us grow!