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Spatial Analysis Application to Urban Forestry
Transcript of Spatial Analysis Application to Urban Forestry
data sources and processing in i-Tree Hydro
by Greg Bacon - Fairfax County GIS & Mapping
Prepared for Virginia Association of Forest Health Professionals
The county is 54% forested? That's great!
We're 23 years early
in meeting our
goal of 45%.
What's going on?
7 Cover Classes
x 50 points per class
DEM elevations accurate to within
1.5 ft of surveyed check points
Stereoscopically Derived Mass Points and Breaklines
Digital Elevation Model
Worldview-2 Land Cover Classification
95% of the time
95% Confidence Interval = 53% ± 4%
Worldview-2 Multispectral Imagery
Captured Summer 2011
Highest resolution commercial satellite imagery available (1.8 m)
Stream Gauge Data
Land Cover %
Run model on sub watersheds
Engage other departments in assessing applicability to stormwater permitting
Input land cover raster in future release (?)