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Data
Requirements:
· 1999 ATLAS 7.5 Meter image data provided by the ARC Program
at Brown University and processed at URI;
· Rhode Island Geographic Information Systems (RIGIS):
1995 Land Use/Cover Data, 1: 5,000 1997 digital orthophotography;
· City of Providence: Parcel boundaries and assessor's
data, neighborhood planning boundaries;
· City tree inventory;
· Field data gathered by dedicated volunteers.
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There are two levels to the analysis. The Citywide Forest
Canopy Characterization involves using remote sensing data
(7.5 meter resolution ATLAS images taken from a Lear Jet)
to measure land cover and vegetation types citywide. This
broad analysis will provide an estimate of tree canopy, lawns,
and impervious surfaces such as rooftops and pavement. Results
will then be used to inform the more detailed Neighborhood
Analysis. The Neighborhood Analysis begins with classifying
typical land use/tree canopy combinations by neighborhood
using results from the Citywide analysis, previous studies,
the City Forester's street tree inventory, and local knowledge.
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Fifteen
to twenty representative sites throughout the City will then
be modeled using American Forest's CITYgreen
GIS software (Urban
Ecosystem Analysis). Results from this detailed measurement
and analysis will be extrapolated over the entire City using
a combination of digital land cover and boundary data.
The
final step will involve estimating economic benefits under
various potential scenarios as well as assessment of urban
forestry needs in the 25 neighborhoods. Measured benefits
include stormwater infrastructure avoidance, pollutant reduction,
and energy savings.
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