land use/land cover data project planning team – march 9-10
TRANSCRIPT
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Land Use/Land Cover Data Project
Planning Team – March 9-10
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Land Use/Land Cover Data Issues
• Dated information – some as old as the mid-80s• Different data needs for various applications• Inconsistent quality and resolution used in various
emissions estimation tools used for regional haze planning– Fire– Dust– Biogenics– Fugitive ammonia– Windblown dust
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Applications of Land Use/Land Cover Data for Planning Purposes
• Emissions Tracking and Management– Dust– Fire– Context for “painting the Reasonable Progress picture”– Emissions data resolution
• Area vs. Point for regulatory purposes
– Near Class I areas Emissions Characterization– Dovetail into Technical Data Portal project
• Technical Uses– Emissions modeling
• Windblown dust• Fugitive Ammonia• Biogenics
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Deliverables - Land Use/Land Cover Data Project
• April - catalogue available data, prepare complete listing of available data for WRAP region
• May - evaluate data for use in emissions estimation technical tools, recommend changes, annotate catalogue above
• June - process data into tools• June - final website report on project
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GIS Data Evaluation• Spatial Resolution
– Need to balance increased resolution with processing requirements/resources
– Depends on expected uses of data sets
– Note data in Figure 4 is derived from Figure 3 data by re-sampling to 2-km resolution – Loss in spatial detail/resolution
• Temporal Changes
– Landuse changes over time
– Relevance for urban areas; desert/barren lands; Ag lands; coastal areas
– Note yellow areas in NE regions and at S end of Bay. Between 1986 and 1993 these are increased areas of barren lands – Possibly due to increased construction activity (urban sprawl)
• Attribute classification
– Data classifications for specific uses
– More detailed categories (wetlands, urban lands)
• Trade-offs between desired resolution/attributes and available resources/data uses
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Figure 1. 1986 LU Data
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Figure 2. 1993 LU Data
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Figure 3. 1993 LU Data (NLCD)
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Figure 4. 1993 LU Data (NLCD)As gridded for WRAP Analyses