vaduz.library.oregonstate:9090/metadataexplorer_find/explorer.jsp

1. vaduz.library.oregonstate.edu:9090/metadataexplorer_find/explorer.jspvaduz.library.oregonstate.edu:9090/metadataexplorer_find/explorer.jsp If interested in job contacttim.fiez@oregonstate.edu NEXT week

3. Models and the Structures of ArcGIS Longley et al., ch. 5 Zeiler, chs. 1 and 6

4. 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

5. Data Model • representation of information about the process • grid or layer (field) • isoline (object) • Delauney triangulation (alternative) • geo-relational (field or object)

6. 3 Data Models • geo-relational coverage (field view; from classic ArcInfo polys) • geo-relational shapefile (discrete object view; from ArcView) • geodatabase (object-oriented; new in ArcGIS 8)

7. A B Georelational Data Model:“Classic” ArcInfo and ArcView Arc Info command line interface Unix, NT, Win2K ArcView as interface

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

9. 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 representedin the GIS • DEM for grid or layer model • contour for isoline model • TIN for Delauney triangulation model • coverages, shapefiles for geo-relational • geodatabase for OO geodatabase

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

11. Geodatabase • Features and attributes as objects • Relationships among features • Validation or editing rules, behaviors • “Container” for • Vector, raster, tabular data • Relationships • topology

12. Relationships for a feature

13. Personal and MultiUser Gdbs

14. yellow coverage green shapefile gray geodatabase ArcGIS 8 Icons( Zeiler, pp. 65-71 )

15. ArcGIS 8 • ArcToolbox (old Arc) - analysis engine • substantial geoprocessing tools • analysis, mostly for coverages • ArcCatalog (old Info) - data mgmt. engine • data preview • managing data • Metadata, Internet access • ArcMap (old ArcPlot) - map engine • display and map production • the next version of ArcView, i.e., ArcView 8.1 • ArcEditor (old ArcEdit) - map editing

16. ArcGIS 8 • “Classic ArcInfo” on the command line • “ArcInfo Workstation”

17. Integration of Modules • ArcMap, ArcCatalog, ArcTools • e.g., ArcCatalog to ArcMap, drag and drop • “ArcGIS” • three main modules & AI Workstation, as well as • ArcSDE • ArcIMS • Other extensions (spatial, geostatistical, “3D”, ArcPress, etc.) • Individual (desktop) or multiuser (enterprise)

18. Integrated Web Access • “transparent” integration with ArcIMS servers • the Geography Network • www.geographynetwork.com

21. Lambert

22. “Extensions” • GRID module for raster analysis and modeling (e.g., “Spatial Analyst”) • Surface module - TINs • Networks • Geostatistics

23. “Extensions” ( cont. )support.esri.com • ArcSDE (1993) • large spatial database applications • adding spatial functions to databases • “find all customers named Smith” • “find all customers named Smith within 1/4 mile of x” • Oracle, Informix, Microsoft SQL Server, IBM Universal Database • ArcIMS • spatial support for web servers • Intergraph, MapInfo, Smallworld

24. “Horizontal” vs. “Vertical” Markets • ArcInfo - one size fits all • ESRI does not lead in diversification • ArcView, ArcExplorer • ArcLogistics, Maplex, Business Analyst, ArcFM • Smallworld, Intergraph, MapInfo, Erdas, etc. • Vertical markets, application domains • see Zeiler pages 48-50 • Applications with their own core data elements

25. ArcGIS Data Modelssupport.esri.com/datamodels.cfm

26. ArcGIS Marine Modeldusk.geo.orst.edu/djl/arcgis