paul cote lecturer in landscape architecture / urban planning
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Exploring 30 Years of Land Use Change: Landsat Time Series Images and Simple Image Classification Techniques. Paul Cote Lecturer in Landscape Architecture / Urban Planning. 500 Design Students. 250 Architecture50 Urban Planning 100 Urban Design100 Landscape. A Representation Engine. - PowerPoint PPT PresentationTRANSCRIPT
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Harvard University Graduate School of Design
Exploring 30 Years of Land Use Change:
Landsat Time Series Images and Simple
Image Classification Techniques
Paul CoteLecturer in Landscape Architecture / Urban Planning
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Harvard University Graduate School of Design
250 Architecture 50 Urban Planning
100 Urban Design 100 Landscape
500 Design Students
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Harvard University Graduate School of Design
GSD Studio Culture:
Focus on representing, understanding, modifying and evaluating places:
• Appearance
• Performance
Intense interest in Spatial Information and Spatial Analysis
A Representation Engine
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Harvard University Graduate School of Design
GSD’s Collection of GIS Tutorials
• http://www.gsd.harvard.edu/gis/manual• Or Google “GIS Manual”
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Harvard University Graduate School of Design
GSD’s Collection of GIS Tutorials
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Harvard University Graduate School of Design
Image Classification Tutorial
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Harvard University Graduate School of Design
Free Data: NASA’s Mission to Earth
North American Landscape Characterization • Orthorectified, Georeferenced • Selected Cloud free Images from 1975,
1985, 1995• $20 from NASA
http://eros.usgs.gov/products/satellite/nalc.html
• Free for download from University of Maryland Global Land Cover Facilityhttp://glcf.umiacs.umd.edu
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Harvard University Graduate School of Design
Free Tools:
Multispec Image Classifier
• From Purdue University• Runs on Macintosh or Windows• Many different classification algorithms• Exchanges data with ArcGIS
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Harvard University Graduate School of Design
Classification Procedure:
• Composite Image bands: – Green, – Red – Infrared
• Cluster pixels statistically (Iso Cluster)• Manually inspect and group clusters into
land cover classes for sample of image• Reclassify• Bring to ArcGIS to find areas of change
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Harvard University Graduate School of Design
Cape Cod 1977
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Harvard University Graduate School of Design
Cape Cod 1999
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Harvard University Graduate School of Design
Unsupervised Clustering 1977
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Harvard University Graduate School of Design
Grouped Clusters 1977
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Harvard University Graduate School of Design
Unsupervised Clustering 1999
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Harvard University Graduate School of Design
Grouped Clusters 1999
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Harvard University Graduate School of Design
Reclassified Clusters 1977
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Harvard University Graduate School of Design
Reclassified Clusters 1977
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Harvard University Graduate School of Design
Change 1977-1999
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Harvard University Graduate School of Design
Change 1977-1999
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Harvard University Graduate School of Design
Caveats:
• This analysis is far from scientific
• The method is strictly exploratory
• It is useful for highlighting areas for closer inspection
• Intended primarily to introduce data resources, tools and classification techniques.
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Harvard University Graduate School of Design
On-Line Tutorial with Cape Cod Images:
www.gsd.harvard.edu/gis/manual/image_class
Paul CoteLecturer in Landscape Architecture / Urban Planning
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Harvard University Graduate School of Design
Exploring 20 Years of Land Use Change:Free Data: Landsat Time Series Images Free Tools: Multispec Image Classifier
1999 Image
1977 Image Clustered Reclassified:Forested / Not
ClusteredReclassified:Forested / Not
Indicated Change: Deforested Reforested