Citizen Science

Citizen science is the collection and analysis of data relating to the natural world. At Casey Trees our citizen science volunteers traverse the city collecting and documenting tree data that will be used to advance the field of urban forestry.

Tree Inventory

Over the past year, we have inventoried thousands of trees across the district to determine the species, height, diameter of the trunk and health of the trees that are growing in our local and national parks. The purpose of these inventories is to gather accurate information that can be used to manage our community forest and prioritize tree maintenance needs. We usually conduct our inventories when there are leaves on the trees — roughly May through October.

Upcoming Tree Inventories»

Tree Report Cards

Casey Trees’ Tree Report Card measures the quantity and condition of D.C.’s trees and the collective efforts of all groups and individuals working to achieve the District’s 40 percent tree canopy goal. It is based on data collected from both public and private sources, including the District and Federal Governments, universities, developers, nonprofits and others.

2017 | 2016 | 2015 | 2014 | 2013 | 2012 | 2011 | 2010 | 2009 | 2008

i-Tree Ecosystem Analysis

What are the benefits of having trees in a city? They provide shade for buildings which in turn lowers utility costs and building emissions. They sequester carbon dioxide that is destroying our ozone. Trees also reduce stormwater runoff and improve air quality. Our i-Tree Ecosystem Analysis reports track these benefits over time, and is based on tree data collected by citizen scientists from 201 plots across the district.

i-Tree Ecosystem Analysis 2015 | i-Tree Ecosystem Analysis 2010 | i-Tree Ecosystem Analysis 2006

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