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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 Presentation
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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
Harvard University Graduate School of Design
250 Architecture 50 Urban Planning
100 Urban Design 100 Landscape
500 Design Students
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
Harvard University Graduate School of Design
GSD’s Collection of GIS Tutorials
• http://www.gsd.harvard.edu/gis/manual• Or Google “GIS Manual”
Harvard University Graduate School of Design
GSD’s Collection of GIS Tutorials
Harvard University Graduate School of Design
Image Classification Tutorial
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
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
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
Harvard University Graduate School of Design
Cape Cod 1977
Harvard University Graduate School of Design
Cape Cod 1999
Harvard University Graduate School of Design
Unsupervised Clustering 1977
Harvard University Graduate School of Design
Grouped Clusters 1977
Harvard University Graduate School of Design
Unsupervised Clustering 1999
Harvard University Graduate School of Design
Grouped Clusters 1999
Harvard University Graduate School of Design
Reclassified Clusters 1977
Harvard University Graduate School of Design
Reclassified Clusters 1977
Harvard University Graduate School of Design
Change 1977-1999
Harvard University Graduate School of Design
Change 1977-1999
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.
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
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
