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Characterizing, measuring and visualizing forest resources. An inadequate treatment by an unqualified presenter. Things in this talk. Remote Sensing 001 Ways We’re Measuring Forests at UConn Quick Note on Visualization. Geospatial Technologies. Geographic Information Systems (GIS)

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characterizing measuring and visualizing forest resources

Characterizing, measuring and visualizing forest resources

An inadequate treatment by an unqualified presenter.

things in this talk
Things in this talk
  • Remote Sensing 001
  • Ways We’re Measuring Forests at UConn
  • Quick Note on Visualization
slide3

Geospatial Technologies

  • Geographic Information Systems (GIS)
  • Remote Sensing (RS)
  • Global Positioning Systems (GPS)
  • Internet
and since we re talking forest rather than trees
And since we’re talking forest rather than trees…

Remote sensing is the art and science of detecting, identifying, classifying, and analyzing the earth’s surface using special sensors onboard airplanes and satellites.

examples of rs data
Examples of RS Data

Imagery

Land Cover

Elevation

rs imagery
General reference/Base mapping

Visual background to other data

Digitize new data

Update existing data

RS Imagery
what is land cover

21% developed

39% forest

16% wetland

What is land cover?

RS image

Land cover map

land cover vs land use
Land Cover vs Land Use
  • Land Cover: Literally, what is covering the land (forest, wetland, pavement)
  • Land Use: What is planned, practiced or permitted on a given area (commercial, residential, dedicated open space)
things in this talk1
Things in this talk
  • Remote Sensing 001
  • Ways We’re Measuring Forests at UConn
  • Quick Note on Visualization
analysis characterization
Analysis & Characterization
  • Forest cover maps
  • Forest block maps
  • Forest fragmentation analysis
  • Distance from a road analysis
  • Buffer analysis
2002 land cover

Wetland

4%

Other2%

Water

3%

Developed19%

Turf/Grass4%

Forest

56%

Grasses/Ag

12%

2002 Land cover
2002 forest cover by town
2002 Forest Cover: by town

Town of Coventry: 67% forested

2002 forest cover by county
2002 Forest Cover: by county

Tolland County: 68% forested

2002 forest cover by watershed
2002 Forest Cover: by watershed

Willimantic Regional Basin: 73% forested

forest cover advantages
Forest Cover: Advantages
  • Easy to understand
  • Total cover relates to watershed research, possible watershed plan goals
  • Can easily fit into “Basic NEMO” educational approach
analysis characterization1
Analysis & Characterization
  • Forest cover maps
  • Forest block maps
  • Forest fragmentation analysis
  • Distance from a road analysis
  • Buffer analysis
forest block analysis
Forest Block Analysis
  • Isolate forest cover
  • Remove any polygons smaller than the size of interest
  • Block size is keyfor birds and others
    • Considerable evidence that powerline corridors and roads reduce the quality of habitat for many species of forest birds in the surrounding habitat
    • Powerlines appear to be a conduit that brings predators and cowbirds deep into the forest interior
forest blocks by watershed
Forest Blocks – by Watershed

Willimantic Regional Basin

forest block advantages
Forest Block: Advantages
  • Easy to generate once you have cover data
  • Relates well to specific habitat concerns
  • Allows the important distinction between amount of forest and amount of usable forest for wildlife
analysis characterization2
Analysis & Characterization
  • Forest cover maps
  • Forest block maps
  • Forest fragmentation analysis
  • Distance from a road analysis
  • Buffer analysis
slide25

UConn CLEAR FF Analysis

  • Original method developed by Riitters et al. (2000) of the USDA/USFS to assess global forest fragmentation from 1 km land cover data.
  • Adapted by CLEAR for use on Landsat-derived land cover information (30-meter spatial resolution).
pixel by pixel analysis

Non-Forest Pixel

Forest Pixel

Pixel-by-pixel analysis

A moving analysis window (9x9 is shown) is used to look at each center pixel in relation to all the surrounding pixels.

slide27

Forest Classes

  • Core Forest - all surrounding grid cells are forest.
  • Perforated Forest - the interior edge of a forest tract such as would occur around a small clearing or house lot.
  • Edge Forest - grid cell is on the exterior edge of a forest tract such as would occur along a large agricultural field or urban area.
  • Transitional Forest - about half of the surrounding grid cells are forest.
  • Patch Forest - less than 40% of surrounding grid cells are forest.
slide28

Forest Classes

  • Core Forest - all surrounding grid cells are forest.
  • Perforated Forest - the interior edge of a forest tract such as would occur around a small clearing or house lot.
  • Edge Forest - grid cell is on the exterior edge of a forest tract such as would occur along a large agricultural field or urban area.
  • Transitional Forest - about half of the surrounding grid cells are forest.
  • Patch Forest - less than 40% of surrounding grid cells are forest.
slide29

Forest Classes

  • Core Forest - all surrounding grid cells are forest.
  • Perforated Forest - the interior edge of a forest tract such as would occur around a small clearing or house lot.
  • Edge Forest - grid cell is on the exterior edge of a forest tract such as would occur along a large agricultural field or urban area.
  • Transitional Forest - about half of the surrounding grid cells are forest.
  • Patch Forest - less than 40% of surrounding grid cells are forest.
slide30

Forest Classes

  • Core Forest - all surrounding grid cells are forest.
  • Perforated Forest - the interior edge of a forest tract such as would occur around a small clearing or house lot.
  • Edge Forest - grid cell is on the exterior edge of a forest tract such as would occur along a large agricultural field or urban area.
  • Transitional Forest - about half of the surrounding grid cells are forest.
  • Patch Forest - less than 40% of surrounding grid cells are forest.
slide31

Forest Classes

  • Core Forest - all surrounding grid cells are forest.
  • Perforated Forest - the interior edge of a forest tract such as would occur around a small clearing or house lot.
  • Edge Forest - grid cell is on the exterior edge of a forest tract such as would occur along a large agricultural field or urban area.
  • Transitional Forest - about half of the surrounding grid cells are forest.
  • Patch Forest - less than 40% of surrounding grid cells are forest.
slide32

Forest Cover Map

2002

Forested area: 1,886,426 acres = 59.3% of CT

slide33

Forest Fragmentation Map

( 9x9 analysis window )

2002

Core Forest: 576,764 acres = 18.1% of CT

forest frag advantages
Forest Frag: Advantages
  • Provide data about quality as well as quantity of forest
  • Can be run at different scales/grid sizes depending on concerns
  • Tells you something about pattern of the forested landscape and its suitability for habitat
forest cover
Forest Cover
  • all based on the same input data (land cover)
  • best use(s) for each???

Forest Cover

Forest Blocks

Forest Fragmentation

analysis characterization3
Analysis & Characterization
  • Forest cover maps
  • Forest block maps
  • Forest fragmentation analysis
  • Distance from a road analysis
  • Buffer analysis
slide43

Distance of Forest From Roads

100 feet

A nationwide study by Foreman (2000) estimates that 22% of total land area is affected ecologically by roads (within 100m of roads).

5400 feet

analysis characterization4
Analysis & Characterization
  • Forest cover maps
  • Forest block maps
  • Forest fragmentation analysis
  • Distance from a road analysis
  • Buffer analysis
land cover within buffers1
Land Cover Within Buffers

100 ft

200 ft

300 ft

what we measured
What we measured

“Natural Vegetation”

combined indicators of stream health
Combined Indicators of Stream Health

After Goetz et al., 2003

build out analysis
Build Out Analysis

ArcGIS and Scenario360