1. gis data structures: how do we represent the world in a …ocw.tufts.edu/data/54/676127.pdf ·...

1. GIS Data Structures: How do we represent the world in a GIS ...

2. Basic data structures for GIS

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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

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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

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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

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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

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11. Sources of raster data

12. Sources of raster data

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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

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15. About image files

16. Digital Elevation Model

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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

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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...

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OCW: Introduction to Geographic Information Systems (GIS) for Urban andEnvironmental Analysis (B. Parmenter)

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21. Map Calculation

22. Vector and raster

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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

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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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29. Disadvantages of TINs

30. Types of data representaiton

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31. Attribute table

32. Attribute field general types

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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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35. How would you represent an this:

36. Topology

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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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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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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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43. Arc/Info Coverages

44. Geodatabases

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