Application%20of%20Geostatistical%20Analyst%20in%20Spatial%20Interpolation

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Application of Geostatistical Analyst in Spatial
Interpolation

• Fei Yan
• Center for Research in Water Resources
• Project for GIS in Water Resources

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Outline

• Introduction
• Data source
• Spatial interpolation
• Inverse Distance Weighted
• Ordinary kriging (default setting)
• Ordinary kriging (trend removed)
• Ordinary cokriging (trend removed)
• Automating the use of Geostatistical tools

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Introduction

• Point measurement -gtSpatial distribution ?
• Spatial interpolation
• Deterministic (e.g. Inverse Distance Weighted)
• Statistical (Kriging)
• Which is better ?

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Data source

• Average temperature and solar radiation on
  01/01/2000 from Daymet

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Inverse Distance Weighted

• Closer points, greater weight

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Ordinary Kriging
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Ordinary kriging (trend removed)
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Trend Removed
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Ordinary cokriging (trend removed)
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Model Comparison (Cross Validation)
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Where? Highest Temperature
Where? Greatest Uncertainty
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ModelBuilder
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