GIS Data Models Explained

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  • Enterprisevs Personal: Accessibility, Security, Size (PGDB 2 GB, SQL Express 4 GB, SQL & Oracle Enterprise limitless)Storage: Indexes (100 files but only 10 used)Structure: Data Model (how data is stored)
  • GIS neutral = Not just Esri but any GIS applicationFlat = non-spatial
  • ISPDM – industry standard pipeline data management systemISAT – integrated spatial analysis techniques
  • Logical – generic blue printPhysical – detailed structure designData dictionary – document that defines the structure
  • Features inherit attributes.
  • StationSeries=5Marker=6
  • GIS Data Models Explained

    1. 1. September 2012 GIS Data Models Explained A look at GIS data models and their functions.GULF INTERSTATE ENGINEERING COMPANY16010 BARKERS POINT LANESUITE 600HOUSTON, TEXAS 77079 USA(713) 850-3400
    2. 2. 1. Purpose2. Introduction to GIS Data Models3. Hierarchy4. Database Objects5. Exercise6. Tips & Tricks 2
    3. 3. • Quick Database Information… – Enterprise versus Personal • Accessibility • Storage • Structure 3
    4. 4. • What is the purpose of using data models? – Efficiency – Quality – Standard 4
    5. 5. 1. Purpose2. Introduction to GIS Data Models3. Hierarchy4. Database Objects5. Exercise6. Tips & Tricks 5
    6. 6. • What is a data model? – A data model defines structured data for storage in Database Management Systems (DBMS).• Are there pipeline related data models? 6
    7. 7. • PODS – Key Notes • GIS software neutral • Relational, hierarchal, GIS data model • Non-spatial / “Flat” • Uses GUIDs 7
    8. 8. • PODS – Pipeline Open Data Standard 8
    9. 9. • PODS – Support Information • PODS was first developed in 1998. • GIS database expanded ISAT data model. • Maintained by PODS Association. 9
    10. 10. • PODS – Pipeline Open Data Standard 10
    11. 11. • APDM – Key Notes • Expressly designed for Esri GIS software • Relational, hierarchal, GIS data model – However, it uses Esri database types to differentiate “domains” from relationships. • Spatially enabled • No GUIDs 11

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