1. Models and Structures of ArcGIS UML and Data Modeling Elements Longley et al., 8 (2/e) Zeiler, chs. 4, 5, and 12 Review Zeiler ch. 1

2. Models for GIS representation of reality --> model GIS itself is based on a model of complexity GIS is used to model complexity full representation of reality? data model = limited representation of reality –a discretization or partitioning of space –finite, discrete nature of computing devices

3. Data Model representation of information about the process FIELD … “grid” OBJECT … “isoline” FIELD or OBJECT … “geo-relational” “Delauney triangulation” (alternative)

4. 3 Data Models geo-relational coverage (object view; from classic ArcInfo) geo-relational shapefile (object view; from ArcView) geodatabase (object-oriented; new in ArcGIS)

5. A B command line interface Unix, NT, Windows ArcView as interface Georelational Data Model: “Classic” ArcInfo and ArcView

6. ArcInfo Coverage as a Data Structure Image courtesy of Louisville/Jefferson County Information Consortium, Kentucky

7. Data Structure not tied to process at all concerned simply with what can be computed and what can’t the way in which the data model is represented in the GIS –DEM for field model –contour for isoline model (variation on object) –TIN for Delauney triangulation model –coverages, shapefiles for geo-relational –geodatabase for OO geodatabase

8. Data Structures ArcInfo coverages ArcView shapefiles ArcInfo grids, USGS DEMs Images (e.g., georeferenced tiffs) TINs Geodatabases

9. ArcGIS 9 Icons ( Zeiler, pp. 65-71 ) yellow coverage gray geodatabase green shapefile

10. Geodatabase If coverages are apples … and shapefiles are oranges … The Geodatabase can be your grocery bag…

11. Elements of the Geodatabase Feature Datasets Feature Classes Relationship classes Geometric Networks Domains Ranges Coded Values Topology Tables Metadata And More!!!

12. Geodatabase Features and attributes as objects Relationships among features Validation or editing rules, behaviors “Container” for –Vector, raster, tabular data –Relationships –Topology MS-Office Object Table

13. Relationships for a feature

14. ESRI Data Models for Geodatabase Templates Pre-designed schema (skeleton) of Objects -Feature classes -Tables Relationships Domains Rules

15. Why Data Models & Gdb Templates? Work with users & partners on practical design projects Build useful ready to load geodatabases Continue the process with feedback from real projects Support & encourage standards

16. ArcGIS Data Models Administrative Boundaries Agriculture Basemap Biodiversity/Conservation Cadastre 2014 Defense/Intel Energy Utilities Environmental Regulated Facilities Historic Preservation Hydrographic/Navigation (IHO) Local Government Marine Petroleum Pipeline System Architecture Telecommunications Transportation Water Utilities Water Resources (Hydro, Groundwater) Forestry Geology Land Parcels

17. http://support.esri.com/datamodels

18. Arc Marine dusk.geo.orst.edu/djl/arcgis