City of Seattle - Tree Directory
Notice illegal pruning or tree removal? Looking for quick links to the City's departments dealing with tree maintenance, conservation, and policy? Seattle reLeaf has a great City Tree Directory to help you find exactly what you're looking for.
Tree Identification Field Guide
The Arbor Day Foundation's Tree Identification Field Guide provides an easy, step-by-step illustrated process to identifying trees based on it's leaf characteristics. They also developed a mobile app to help you identify more than 250 tree species in the United States and Canada while you're on the go.
Trunk Diameter: Learn How to Measure
Learn how to measure trees with this useful video from our friends in San Francisco.
Leafsnap is the first in a series of electronic field guides being developed by researchers from Columbia University, the University of Maryland, and the Smithsonian Institution. This free mobile app uses visual recognition software to help identify tree species from photographs of their leaves. Primarily documenting species found in the Northeast United States.
YardMap is a citizen science project designed to cultivate a richer understanding of bird habitat, for both professional scientists and people concerned with their local environments. They collect data by asking individuals across the country to literally draw maps of their backyards, parks, farms, favorite birding locations, schools, and gardens, and then connecting the landscape details and provide tools for you to make better decisions about how to manage landscapes sustainably.
Global Forest Watch
Global Forest Watch is a dynamic online forest monitoring and alert system uniting satellite technology, open data, and crowdsourcing to allow you to see forest loss and gain worldwide in color; pink represents tree cover loss, blue represents gain. Read more about the project from the World Resources Institute. The BBC also wrote a great article on the new tool with some interesting background information and quotes from the developers. Data from Google and the University of Maryland says Earth lost 230 million Ha (hectares, or 10,000 square meters) of trees between 2000 and 2012.
Check out Global Forest Watch for yourself, and try out the analyze tool to see results from a specific area that you draw yourself. Our analysis of Seattle using this tool showed a 7.9 Ha (19.5 acres) net forest loss from 2000 to 2012 (30 Ha loss, 22.1 Ha gain).
Friends of Urban Forests
Friends of Urban Forests provides some useful resources and Seattle urban forestry news including recent case studies, information about urban forest ordinances, and urban forest resources at the national, state, and local level. There is also a list of online urban forest maps, including our own Seattle Tree Map.