Assessing the Tree Canopy in Jefferson County, WV
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Assessing the Tree Canopy in Jefferson County, WV
Jarlath O’Neil-DunneUniversity of VermontSpatial Analysis Laboratory
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Tree Canopy AssessmentQuestions Answers
How much tree canopy do we have?
How much tree canopy could we have?
Who “owns” the tree canopy?
What is the distribution of the tree canopy?
TC Metrics
Possible TC
Vegetation
Impervious
Existing TC
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Approach
• High resolution• Object based• >95% accuracy• Realistic
representationLand Cover
Mapping
• Summary statistics
• Scalable• Relevant
TC Metrics • Reports
• Database tables• Spreadsheet• Maps
Products
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Tree Canopy Assessment Classes
Existing TC
Possible TC
ImperviousVegetation
Jefferson County, WV
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Leveraging Existing Investments
Buildings
Transportation
LiDAR
Imagery
Jefferson County, WV
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Comparison to National Datasets
100% 0%
National LandCover Dataset
TCLand Cover
38%
30%
Color InfraredAerial Imagery
TC EstimatesDerived from 2007 aerial imagery, 1m resolution
Derived from 2001 satellite imagery, 30m resolution
Tree CanopyGrass/ShrubBare EarthWaterBuildingsRoadsOther Paved Surfaces
Jefferson County, WV
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Land Cover MetricsJefferson County, WV
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County TC Metrics• 133661 acres of land (excludes water)
• 50603 acres of Existing TC
• 75807 acres of Possible TC that is grass/shrub
• 3055 acres of Possible TC that is impervious
• 4197 acres are not suitable for tree canopy (building, water, and transportation)
Jefferson County, WV
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Municipal AnalysisExisting TC
15%16% - 21%22% - 46%47% - 49%50% - 69%
Possible TC19%20% - 30%31% - 33%34% - 70%71% - 78%
Existing TC15%16% - 21%22% - 46%47% - 49%50% - 69%
Possible TC19%20% - 30%31% - 33%34% - 70%71% - 78%
Jefferson County, WV
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Municipal TC MetricsJefferson County, WV
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Zoning Analysis
N/A
Incorporated Town
Industrial-Commercial
Residential-Growth
Residential-Light Industrial-Commercial
Rural
Village
Jefferson County, WV
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Zoning AnalysisExisting TC
2% - 15%16% - 28%29% - 40%41% - 58%59% - 100%
Possible TC0% - 26%27% - 41%42% - 58%59% - 77%78% - 93%
Jefferson County, WV
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Zoning TC MetricsJefferson County, WV
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Urban Growth Center AnalysisJefferson County, WV
Existing TC18%
19% - 21%
22% - 51%
52% - 60%
Possible TC31%
32% - 41%
42% - 72%
73% - 76%
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Urban Growth Center TC Metrics
Jefferson County, WV
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Hydrologic Basin AnalysisJefferson County, WV
Existing TC19% - 26%27% - 39%40% - 45%46% - 60%61% - 92%
Possible TC7% - 14%15% - 40%41% - 60%61% - 67%68% - 80%
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Hydrologic Basin TC MetricsJefferson County, WV
0 10,000 20,000 30,000 40,000 50,000 60,000 70,000
Opequon
Potomac
Shenandoah
Acres
Existing UTC
Possible UTC Vegetation
Possible UTC Impervious
Not Suitable
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Slope Analysis
Slope Class (Old)0-9.9%10-14.9%15-19.9%20-24.9%25-29.9%30-34.9%>35%
Slope Class (New)0-14.9%15-24.9%25-49.9%>50%
LiDAR-derived DEMElevation
High : 300
Low : 70
DEM Old Slope Classes New Slope Classes
Jefferson County, WV
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Slope TC MetricsN
ew S
lope
C
lass
esO
ld S
lope
Cla
sses
Jefferson County, WV
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Blue Ridge Mountains AnalysisJefferson County, WV
LiDAR-derived DEMElevation
High : 300
Low : 70
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Comparison to Other CitiesJefferson County, WV
27%
49%46%
38%
43%
9%
49%
27%32%
14%
62%50%
41%38%
49%
21%
69%
15%
46%
26%27%
20%
44%
37%30%
39%38%
35%
0%
20%
40%
60%
80%
100%
Not Suitable
% Possible Tree Canopy -Impervious
% Possible Tree Canopy -Vegetation
% Tree Canopy -Land Area