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Implementing Geodatabase Technology. Kay Anderson & Kendis Scharenbroich Cass, County, ND & Pro-West & Associates. What Is A Geodatabase?. A container for spatial and attribute data Shapefiles, coverages, raster, CAD Personal Geodatabase 2G size limit Stored in an Access database

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Implementing Geodatabase Technology


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    1. Implementing Geodatabase Technology Kay Anderson & Kendis Scharenbroich Cass, County, ND & Pro-West & Associates

    2. What Is A Geodatabase? • A container for spatial and attribute data • Shapefiles, coverages, raster, CAD • Personal Geodatabase • 2G size limit • Stored in an Access database • SDE Geodatabase • Stored in a RDBMS (Oracle, SQL, etc) • Connect through a SDE Server or Direct Connect

    3. Benefits of A Geodatabase • Intelligent Behavior • Spatial & attribute data integrity • Centralized Data Storage • Advanced analysis capabilities • Flow analysis • Multi-user editing environment

    4. Feature Dataset Feature Class Terminology

    5. SDE SQL GIS View/Analyze Interpreter Storage What Is SDE? • Software that allows a user to manage spatial & tabular data housed within DB2, Informix, SQL Server or Oracle databases.

    6. ArcInfo ArcView MapObjects ArcIMS ArcExplorer SDE SQL

    7. SDE Geodatabase Multi-user editing Data Integrity Subtypes, domains, rules, etc Stores Raster Data Need ArcEditor or ArcInfo to edit Disconnected Editing Check-in/out process Personal Geodatabase Single user editing Data Integrity Domains(AV), rules (AI) Stores Raster Data Edit in ArcView Geodatabase Highlights

    8. Default Database Planning Version Edit Version Plan 1 Version Plan 2 Version Multi-user Editing • Versioning • Snapshot of default database • Stores edits only • Not a database replication • Multiple users can access a • single version

    9. Domains/Subtypes • Subtype: • Distinguish features within a single layer • Water Main • Force, Gravity, Temp • Domain: • Identify attribute values

    10. Disconnected Editing • Mobile Mapping Applications • PDA Units, Tablet Computers, Offsite Editing

    11. Design 101 • Organize • Use Feature Datasets only when you need to • Topology or Geometric Networks • Several feature datasets with a limited number of feature classes is better for performance • Choose Spatial Reference carefully • Start with a personal geodatabase • Set rules • TEST TEST TEST!

    12. Is SDE Right for You? • Do you have the need for multiple people editing the same piece of data? • Is mobile mapping in your future? • Do you have more than 2G of data to transfer into a geodatabase? • Do you want a better way to maintain your data?

    13. ESRI Data Models • Make implementation to the geodatabase environment easier • Create consistency between organizations • Support existing FGDC standards • Designed with both Users and ESRI TIP You do not need to use the entire model

    14. Why should Cass County make the switch to Geodatabases? • Volume of data to be managed keeps increasing • Shared updates & maintenance of datasets with The City of Fargo • Increasingly unable to represent reality e.g. apartments, mobile home & multi-units • Complex data access needs from multiple users on two networks

    15. Geodatabase Benefits • Cass County will have the ability to maintain data more efficiently through Topology, subtypes and domains • All available data sets will be accessible in a uniform repository • Multi-user editing

    16. Planning • Consultations started in May with Pro-West & City of Fargo • 2005 Budget numbers needed for hardware & software • Recognized needs for intranet based GIS application & more interactive IMS site

    17. Challenges • Existing GIS data server almost past sell by date! • 150gb of 1ft color Orthophotos arriving the next 2 months need a home! • Cass & Fargo need to access and edit the same data across two networks divided by a robust firewall

    18. The Nuts & Bolts! • Which spatial domain is appropriate? • Cass data & imagery in State Plane North Dakota South, Fargo has highly accurate customized projection – who compromises?! • Where will the editable version reside? • Who will have editing rights? • How to replicate the data?

    19. Possible Solutions • One GDB with separate Feature Datasets for Cass & Fargo allows different coordinates to be set • How will this data behave when pulled in to IMS & intranet browser…need to test the scenarios

    20. What have we done? • 2005 budget finalized • Multiple Storage Array Network installed with 1 TB free space for GIS • Experimenting with Cass data in Personal GDB • Test different combinations of feature data sets, relationships, subtypes, domains etc. • Education – review white papers, best practices, data models, text books

    21. 2005 Plans • Install SDE & SQL • Set up permissions and import data • Test & refine processes • Establish requirements for intranet based GIS application & IMS site • Migrate users to new version later in the year

    22. Questions? Kay Anderson: andersonk@co.cass.nd.us 701-241-5762 Kendis Scharenbroich: kscharen@prowestgis.com 218-547-3374 x106