Casey Trees News
leaflet
the
January 2011
In this issue...
2 American Elm Restoration
Tree care tips from the Winter Almanac.
3 Letter from the Executive Director 4 3030 rain garden gets started 5 Tree care plan ends in success
No trees died in LGBT group’s memorial grove.
6 Big season for RiverSmart Homes
And the Community Tree Planting program, too.
7 Kids Corner
The Leaflet In addition to a new design, The Leaflet will be distributed monthly.
Imaging data will help canopy studies
U
sing data from satellites and airplanes, the Geographic Resources department at Casey Trees has developed detailed maps and images that will be useful for future tree canopy studies. The images are based on elevational data derived from an airborne light detection and ranging (LIDAR) system. GIS Specialist Michael Potts produced 3D tree maps by “draping”
A screenshot of Captiol Hill and 8th Street SE, where Casey Trees planted more than 50 elms in 2003. LIDAR data provided by DC GIS have been used to determine tree heights.
high resolution satellite imagery over a 3D digital surface model (DSM) of particular neighborhoods. The DSM includes everything on the ground, including trees, buildings and roads. This type of 3D modeling is useful for tree studies because it offers a striking and effective means of visually inspecting canopy. This is useful for planning purposes because it is possible to interactively determine which areas have dense tree canopy and which are sparser. Additionally, LIDAR can identify individual trees and determine their heights, as well as general canopy volumes. The data are used to measure trees added to the Trees of Note program, which enables citizens to nominate trees with significant value in the District to the Casey Trees Map. As updated LIDAR data become available in the future, Casey Trees will be able to more thoroughly assess our operations in relation to the Urban Tree Canopy Goal.
On the first Tuesday of every month you can read the latest news about the people and programs that bring to life Casey Trees’ mission.
Tree Report Card If you are associated with an organization that planted trees in the District in 2010, please contact Mike Galvin, Deputy Director (mgalvin@caseytrees.org or 202.349.1909) with the details of the planting so we can include your efforts in the annual Tree Report Card tree planting tally.
Tree Recycling Tip You have until Jan. 9 to put your holiday trees and wreaths in the tree box space in front of your house. Remove all decorations and do not place the tree in a plastic or cloth bag. For further information, contact the District Dept. of Public Works.