ECOSAT

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ECOSAT

• A New Generation of Eco-landscape Descriptors
  Derived From Satellite Imagery
• Dymond, Shepherd Ausseil

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Introducing ECOSAT

• Landscape and ecosystem descriptors
• High resolution 15m pixels
• Regional and national coverage
• Satellite based

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National coverage
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Digital Elevation Model - DEM
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TM Image
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TM Image Flattened
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TM Image
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TM Image Flattened
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Vegetation Woody or Not
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Riparian Vegetation
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Basic Land Cover
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Forest Composition
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Forest Composition
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Ecosat forests
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Ecosat forests
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EcoSat Applications

• Wetland Mapping and Prioritisation
• Erosion Risk February Storm
• High Country Condition
• Lowland Possum Habitat Spatial TB Model
• Indigenous Forest Possum Density

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Wetland mapping

• EBOP, Horizons MW
• Fast inventory of wetlands
• Land pressure analysis
• Prioritising wetlands in the MW region
• National mapping of wetlands (DOC WONI project)

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Wetland mapping
ETM satellite image
Ancillary data
GPS location
Flattening spectral rules
Region growing
Estuarine
Lacustrine
Riverine
Palustrine
Marine
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Map results
Satellite image
Wetland map
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Map results
Tangimoana/ Rangitikei Estuary
Distribution of palustrine wetlands in the
Manawatu/Wanganui region
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Land pressure analysis
Total catchment area 440 ha
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Riparian analysis
Total riparian area 194 ha
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Surrounding land analysis
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Estimating biodiversity value
Criteria
Ranking Weighted sum
Representativeness V1
4
å

V
w
V
Areal extent V2
i
i

1
i
Surrounding naturalness V3
Terrestrial V4a
Connectivity V4
Aquatic V4b
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Estimating the value of representativeness

• Data input
• Environmental Domain
• (LENZ level III) A
• Current area a
• Historical area Ha

V1
ö
æ
a

ç

R

ç
H
ø
è
a
A
R
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Estimating surrounding naturalness value
V3
Area (forest, lake)
Native forest area 0 Lake area 0
Native forest area 56 ha Lake area 2.5 ha
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Estimating connectivity value
Terrestrial connectivity for bird networks value
Data input Number of wetlands in the same buffer
zone (1 km, 5 km)
Value
V4a
Number of wetlands
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Estimating connectivity value

• Subcatchments automatically delineated for all
  the wetland sites

• Logical catchment connectivity between wetlands

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Estimating connectivity value
Aquatic connectivity for fish migration value
Data input Number of wetlands upstream and
downstream Distance to the nearest wetland
Value
V4b
Number of wetlands
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Results
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Summary
ETM image
DATA
DEM
LENZ
Wetland map
Basic Land cover
Catchment delineation
PRESSURE ANALYSIS
INDICATORS
Representativeness Size Naturalness
Land cover Riparian zone
Surrounding land
Connectivity
Prioritisation
PLANNING
Implementation
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ErosionRisk
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High Country Condition
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Living Vegetation (r2 0.76)
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Bare Ground (r2 0.64)
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Possum TB Model
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Orongorongo Possum Research Area
Water catchment (WRC)
Rimutaka Forest Park (DOC)
Research area

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EcoSat Basic Landcover
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Indigenous Forest Composition
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Expected possum density no control
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Immediately after possum control
Scenario 95 killed in water catchment 75
killed in RFP None killed in research area
2-km buffer
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1 year after possum control
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2 years after possum control
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3 years after possum control
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4 years after possum control
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5 years after possum control
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7 years after possum control
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ECOSAT in Summary

• Landscape and ecosystem descriptors
• High resolution 15m pixels
• Regional and National coverage
• Satellite based
• http//www.landcareresearch.co.nz/services/ecosat