Loading presentation...

Present Remotely

Send the link below via email or IM

Copy

Present to your audience

Start remote presentation

  • Invited audience members will follow you as you navigate and present
  • People invited to a presentation do not need a Prezi account
  • This link expires 10 minutes after you close the presentation
  • A maximum of 30 users can follow your presentation
  • Learn more about this feature in our knowledge base article

Do you really want to delete this prezi?

Neither you, nor the coeditors you shared it with will be able to recover it again.

DeleteCancel

Spatial Analysis Application to Urban Forestry

This presentation shows development of land cover and elevation data and their uses in i-Tree Hydro to model effects of tree cover on water flow and water quality. Preliminary results for the Difficult Run watershed are shown.
by

Gregory Bacon

on 6 February 2014

Comments (0)

Please log in to add your comment.

Report abuse

Transcript of Spatial Analysis Application to Urban Forestry

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
February 2014

Elevation
Land Cover
The county is 54% forested? That's great!


We're 23 years early
in meeting our
2037
goal of 45%.


What's going on?
True Class
Raster Class
"Like"
7 Cover Classes
x 50 points per class

350 points
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%
Shape
Color
Texture
Neighborhood
Worldview-2 Multispectral Imagery
Captured Summer 2011
Highest resolution commercial satellite imagery available (1.8 m)
8 channels
Thank You!
Gregory.Bacon@fairfaxcounty.gov
Acknowledgments:
Mike Knapp
Frank Finch
Joan Allen
Nick Drunasky
Classification Accuracy
Assessment
Weather Data
Stream Gauge Data
DEM
Land Cover %
LAI
Soil Characteristics
Calibration
Alternative Scenarios
http://www.itreetools.org/resources/archives.php
Next Steps
Run model on sub watersheds

Engage other departments in assessing applicability to stormwater permitting

Input land cover raster in future release (?)
Segmentation
Classification
Stream Gauge
Full transcript