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1. GIS Data Structures: How do we represent the world in a GIS ...
2. Basic data structures for GIS
Tufts OpenCourseWare © 2008 Tufts University
GIS Data Structures
OCW: Introduction to Geographic Information Systems (GIS) for Urban andEnvironmental Analysis (B. Parmenter)
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3. Vector data structure: points, lines, and polygons
4. Vector data
Tufts OpenCourseWare © 2008 Tufts University
GIS Data Structures
OCW: Introduction to Geographic Information Systems (GIS) for Urban andEnvironmental Analysis (B. Parmenter)
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5. Raster data structure (grid)
6. Raster and vector data
Tufts OpenCourseWare © 2008 Tufts University
GIS Data Structures
OCW: Introduction to Geographic Information Systems (GIS) for Urban andEnvironmental Analysis (B. Parmenter)
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7. Raster grid
8. Raster grid
Tufts OpenCourseWare © 2008 Tufts University
GIS Data Structures
OCW: Introduction to Geographic Information Systems (GIS) for Urban andEnvironmental Analysis (B. Parmenter)
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9. Grids
10. Elevation grid for area north of Kirkuk, Iraq
Tufts OpenCourseWare © 2008 Tufts University
GIS Data Structures
OCW: Introduction to Geographic Information Systems (GIS) for Urban andEnvironmental Analysis (B. Parmenter)
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11. Sources of raster data
12. Sources of raster data
Tufts OpenCourseWare © 2008 Tufts University
GIS Data Structures
OCW: Introduction to Geographic Information Systems (GIS) for Urban andEnvironmental Analysis (B. Parmenter)
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13. Sources of raster data
14. About image files
Tufts OpenCourseWare © 2008 Tufts University
GIS Data Structures
OCW: Introduction to Geographic Information Systems (GIS) for Urban andEnvironmental Analysis (B. Parmenter)
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15. About image files
16. Digital Elevation Model
Tufts OpenCourseWare © 2008 Tufts University
GIS Data Structures
OCW: Introduction to Geographic Information Systems (GIS) for Urban andEnvironmental Analysis (B. Parmenter)
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17. Digital Elevation Model
18. Digital Elevation Model
Tufts OpenCourseWare © 2008 Tufts University
GIS Data Structures
OCW: Introduction to Geographic Information Systems (GIS) for Urban andEnvironmental Analysis (B. Parmenter)
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19. Digital Elevation Model
20. Examples of raster analysis – neighbor (adjacent) cell...
Tufts OpenCourseWare © 2008 Tufts University
GIS Data Structures
OCW: Introduction to Geographic Information Systems (GIS) for Urban andEnvironmental Analysis (B. Parmenter)
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21. Map Calculation
22. Vector and raster
Tufts OpenCourseWare © 2008 Tufts University
GIS Data Structures
OCW: Introduction to Geographic Information Systems (GIS) for Urban andEnvironmental Analysis (B. Parmenter)
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23. Triangulated Irregular Network (TIN)
24. Vector Elevation Data
Tufts OpenCourseWare © 2008 Tufts University
GIS Data Structures
OCW: Introduction to Geographic Information Systems (GIS) for Urban andEnvironmental Analysis (B. Parmenter)
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25. Example of a TIN
26. Resulting TIN
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GIS Data Structures
OCW: Introduction to Geographic Information Systems (GIS) for Urban andEnvironmental Analysis (B. Parmenter)
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27. Examole of 30m DEM
28. Why use a TIN data structure?
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GIS Data Structures
OCW: Introduction to Geographic Information Systems (GIS) for Urban andEnvironmental Analysis (B. Parmenter)
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29. Disadvantages of TINs
30. Types of data representaiton
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GIS Data Structures
OCW: Introduction to Geographic Information Systems (GIS) for Urban andEnvironmental Analysis (B. Parmenter)
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31. Attribute table
32. Attribute field general types
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GIS Data Structures
OCW: Introduction to Geographic Information Systems (GIS) for Urban andEnvironmental Analysis (B. Parmenter)
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33. How would you represent:
34. Or this:
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GIS Data Structures
OCW: Introduction to Geographic Information Systems (GIS) for Urban andEnvironmental Analysis (B. Parmenter)
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35. How would you represent an this:
36. Topology
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GIS Data Structures
OCW: Introduction to Geographic Information Systems (GIS) for Urban andEnvironmental Analysis (B. Parmenter)
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37. Network Topology
38. Planar topology
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GIS Data Structures
OCW: Introduction to Geographic Information Systems (GIS) for Urban andEnvironmental Analysis (B. Parmenter)
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39. Topological relationships
40. For your project
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GIS Data Structures
OCW: Introduction to Geographic Information Systems (GIS) for Urban andEnvironmental Analysis (B. Parmenter)
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41. Should a data layer be topologically structured?
42. ArcGIS major data formats
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OCW: Introduction to Geographic Information Systems (GIS) for Urban andEnvironmental Analysis (B. Parmenter)
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43. Arc/Info Coverages
44. Geodatabases
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OCW: Introduction to Geographic Information Systems (GIS) for Urban andEnvironmental Analysis (B. Parmenter)
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