1. Introducing the Geodatabase

2. Introducing the Geodatabase
Geographic Database – geodatabase
Storing spatial and attribute data
Container for spatial and attribute data (tables)
Scaleable (one user to multiple users)
Supports data integrity
Stores topology and relationships

3. Spatial Data Formats Raster Vector Geodatabase (1999) TIFF and JPEG
Example: Nautical Charts, DRG, DOQQ
ESRI GRIDS
Example: Digital Elevation Models (DEMS)
Vector
ArcInfo Coverage (1983)
Supports topology
Shapefile
Does not support topology
Geodatabase (1999)

4. Diagram of the Physical Database
MarineFeatures
NavFeature
Trackline
Waypoints
MarineReserve
This is a diagram of the physical database

6. Shapefiles
Geodatabase

9. Weakness Not backward compatible Takes time to build the model
Purchase of software and hardware for multiuser implementation.

10. Benefits More sophisticated analysis and editing
Relationships, topology, attribute validation
Better organization of data
Multiuser editing
One of the advantages of having a centralized database model is that data is better organized so less time
Will be spend completing projects
Because you can set rules and data types have relationships, it allows for a more sophisticated analysis of geogarhic data
Another important to remember is that ESRI holds 50% of the GIS software market
ESRI market presence
50% of commercial GIS software
Annual revenue of $427 million in a $1 billion industry
20% of revenue to to R&D
This means that they will continue to develop and improve this model.