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Estimation Tool for Impervious Surfaces (ETIS). Anna Chabaeva Jason Parent Daniel Civco. Department of Natural Resources Management & Engineering The University of Connecticut U-4087, Room 308, 1376 Storrs Road Storrs, CT 06269-4087. Compare predicted amount of imperviousness to:. - PowerPoint PPT Presentation
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Estimation Tool for Estimation Tool for Impervious Surfaces Impervious Surfaces
(ETIS)(ETIS)Anna Chabaeva Jason Parent Daniel Civco
Department of Natural Resources Management & Engineering
The University of ConnecticutU-4087, Room 308, 1376 Storrs Road
Storrs, CT 06269-4087
ObjectivesObjectives
Describe functionality of newly developed ETIS tool
Compare predicted amount of imperviousness to:
• highly accurate and precise planimetric data
• ISAT derived impervious surface data (NLCD, CCL)
• NLCD 2001 impervious surface layer
• CCL 2002 impervious surface layer
Impervious Surface Impervious Surface (IS)(IS)
The imprint of land development on the landscape:
Rooftops
• Buildings• Pools• Patios
Transportation System
• Roads• Sidewalks• Driveways• Parking lots
Influence of Impervious Surfaces Influence of Impervious Surfaces on Water Qualityon Water Quality
100
90
80
70
60
50
40
30
20
10
0
DEGRADED
PROTECTED
IMPACTED
WA
TE
RS
HE
D IM
PE
RV
IOU
SN
ES
S (
%)
ETIS – Regression ModelETIS – Regression Model
ii AbPopDenbb %IS 21
where - b1 is the IS-axis intercept
- b2 is the coefficient for population density
- bi are those for percentage of land cover category area within the tract- PopDen is the Population density- %Ai are the percent of the land cover category area
within the tract
Calibration Data221 NY tracts
Validation Data82 CT tracts
ETIS OverviewETIS Overview
IS for existing conditions
IS for changing conditions
ETIS Data RequirementsETIS Data Requirements
ETIS Data RequirementsETIS Data RequirementsLand CoverLand Cover
GRID, IMG, TIFF
ETIS Data RequirementsETIS Data RequirementsAnalysis UnitAnalysis Unit
SHP
ETIS Data RequirementsETIS Data RequirementsPercent Imperviousness EstimatesPercent Imperviousness Estimates
ETIS Data RequirementsETIS Data RequirementsPopulation DensityPopulation Density
People/sq mi
Preloaded
ETIS Data RequirementsETIS Data RequirementsCoefficientsCoefficients
DBF
ETIS Data RequirementsETIS Data RequirementsChange LayerChange Layer
SHP
ETIS ComparisonETIS Comparison
RMSE=8.09y = 1.2088x - 0.3007
R2 = 0.93970
20
40
60
80
100
0 20 40 60 80 100
Actual %IS
NLC
D S
ub-p
ixel
%IS
RMSE=7.72y = 1.2479x - 2.0241
R2 = 0.95180
20
40
60
80
100
0 20 40 60 80 100
Actual %IS
CC
L S
ub-p
ixel
%IS
RMSE=4.37y = 0.8431x + 4.1378
R2 = 0.94060
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40
60
80
100
0 20 40 60 80 100
Actual %IS
NLC
D IS
AT %
IS
RMSE=4.22y = 0.977x + 1.823
R2 = 0.94190
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40
60
80
100
0 20 40 60 80 100
Actual %IS
NLC
D E
TIS
%IS
RMSE=4.73y = 0.8548x + 2.763
R2 = 0.92910
20
40
60
80
100
0 20 40 60 80 100
Actual %IS
CC
L E
TIS
%IS
RMSE=6.30y = 0.7088x + 5.1551
R2 = 0.93510
20
40
60
80
100
0 20 40 60 80 100
Actual %IS
CC
L IS
AT %
IS
RMSE R-squared
NLCD Sub-pixel 6.84 0.93
CCL Sub-pixel 10.88 0.95
NLCD ISAT 5.26 0.94
CCL ISAT 7.23 0.91
NLCD ETIS 3.61 0.95
CCL ETIS 5.09 0.91
ETIS Web SiteETIS Web Site
http://clear.uconn.edu/tools/geospatial/etis/index.html
ETIS DownloadETIS Download
http://clear.uconn.edu/tools/geospatial/etis/index.html
Estimation Tool for Estimation Tool for Impervious Surfaces Impervious Surfaces
(ETIS)(ETIS)Anna Chabaeva Jason Parent Daniel Civco
Department of Natural Resources Management & Engineering
The University of ConnecticutU-4087, Room 308, 1376 Storrs Road
Storrs, CT [email protected]
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