GIS Data Structures: How do we represent the world in a GIS database?
	Basic data structures for GIS
	Vector data structure: points, lines, and polygons
	Vector data
	Raster data structure (grid)
	Raster and vector data
	Raster grid
	Raster grid
	Grids
	Elevation grid for area north of Kirkuk, Iraq
	Sources of raster data
	Sources of raster data
	Sources of raster data
	About image files
	About image files
	Digital Elevation Model
	Digital Elevation Model
	Digital Elevation Model
	Digital Elevation Model
	Examples of raster analysis – neighbor (adjacent) cell analysis
	Map Calculation
	Vector and raster
	Triangulated Irregular Network (TIN)
	Vector Elevation Data
	Example of a TIN
	Resulting TIN
	Examole of 30m DEM
	Why use a TIN data structure?
	Disadvantages of TINs
	Types of data representaiton
	Attribute table
	Attribute field general types
	How would you represent:
	Or this:
	How would you represent an this:
	Topology
	Network Topology
	Planar topology
	Topological relationships
	For your project
	Should a data layer be topologically structured?
	ArcGIS major data formats
	Arc/Info Coverages
	Geodatabases

• LU1:Yellow Submarine-PDF tutorial
• Creating a Map with ArcMap
• Creating a File Geodatabase
• Using Tools for Querying
• Georeferencing a Scanned Map