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Apdm 101 Arc Gis Pipeline Data Model (1)


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An introduction to ESRI GIS and the ArcGIS Pipeline Data Model.

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Apdm 101 Arc Gis Pipeline Data Model (1)

  1. 1. APDM 101(ArcGIS Pipeline Data Model) or "What did you do to my As-Builts and Alignment sheets and how am i supposed to use this new acronym thingy?"
  2. 2. First, an introduction to GISGeographic Information System • A geographic information system (GIS) integrates hardware, software, and data for capturing, managing, analyzing, and displaying all forms of geographically referenced information.GIS allows us to view, understand, question, interpret, andvisualize data in many ways that reveal relationships, patterns,and trends in the form of maps, globes, reports, and charts.A GIS helps you answer questions and solve problems bylooking at your data in a way that is quickly understood andeasily shared. • System of : o Data, Software, Hardware, People and Processes
  3. 3. GIS - Data makes the world go roundGeographic Information System• Data o Raster - Aerial Photography  A continuous grid of Values at X,Y coordinates o Tabular - "Object Classes"  Rows and columns of attribute values o Vector - "Feature Classes"  Points,  X,Y coordinate (with attribute values)  Lines,  Collections of X,Y coordinates (with attributes)  Polygons  Area within a closed loop consisting of a collection of X,Y cordinates (with attributes)
  4. 4. What GIS Software do we have• ESRI - ArcGIS o ArcSDE  Database application which manages geospatial data inside of Oracle o ArcCatalog  Explorer for Geospatial data o ArcMap  Data Editing  Data Visualization  Data Analysis  Reporting  Map Generation o ArcFM Viewer  Data Viewing
  5. 5. What is this Geodatabase you speak of?• The Geodatabase - o A geo-spatially enabled database. o Database stores tables in columns and rows of attributes o Geodatabase adds the ability to store spatial locations along with the other attributes in the tables.• Geodatabase "Flavors" o Enterprise - Multi User, Versioned, Stored in Oracle o Personal - Single user, non-Versioned, Stored in .MDB o File - Multi-User w/ limitations, Stored in folder of files.
  6. 6. Whats in the Geodatabase?• The Geodatabase contains o Object Classes - Tables with attribute fields and rows o Feature Classes - Tables which also store Geometry o Relationship Classes - relate Objects & Features• Inside the Geodatabase, Feature Datasets contain related FeatureClasses in the same coordinate system.  APDM < --- Geodatabase  Site < --- Object Class  Transmission < --- Feature Dataset (like a folder)  ControlPoints < --- Feature Class  StationSeries < --- Feature Class  StationSeriesControlPoints < -- Relationship Class
  7. 7. So the data can be one of these types?• Pipeline Data Examples o Tables  Site  StructureOrIDSite  AllLeakInfo o Points  Valves - "Online" - "on the pipeline centerline"  CP Test Station - "Offline" - not on the centerline o Lines  Pipe Segments - "Online" - "on the centerline"  Casing - "Online" - "on the centerline"  Access Roads - "Offline" - not on the centerline o Polygons  Identified Sites - "Offline"  Storage Field Pool and Buffer - "Offline"
  8. 8. Attribute Fields?• What Kinds of attributes o Date - "10/12/11" o Text - "CW1234" o Integer - "4" o Double - "12.75" o GUID - "{21EC2020-3AEA-1069-A2DD-08002B30309D}"  More about GUIDs later....• Defaults - value inserted when a feature or object is created.• Allow Null - Y/N• Domains o Coded Domains - AKA: Pick Lists or Valid Value Lists  Valve Class,  Structure Type, o Ranges - "Minimum and Maximum"  0-360 - degrees of rotation
  9. 9. APDMAttributeFieldsExamples
  10. 10. JoinsGIS - Geographic Information System• Records in one Object Class or Feature Class can be connected to records in another Object Class or Feature Class. o Joins  Appending the fields of one table to those of another through an attribute or field common to both tables. A join is usually used to attach more attributes to the attribute table of a geographic layer. o Primary Key - the unique identifier of a row or feature. o Foreign Key - the unique identifier of another row or feature which can be joined to the first row or feature.
  11. 11. Joins : an exampleGIS - Geographic Information System
  12. 12. Relationship ClassesPermanent Relates, stored inside the Geodatabase.• StructureOrIdentifiedSite o IdentifiedSite o StructureOutline o NearestPointToLine• InLine Inspection runs o Metal Loss Anomaly• Identified Site o HCA Segment• Assessment Project o Assessment Region  Assessment Region Range
  13. 13. GUIDSGlobally Unique IDentifier -• Represented as a 32-character hexadecimal string, such as {21EC2020-3AEA-1069-A2DD-08002B30309D}• Applied to all records and features in the APDM as the Primary Key field: "EventID"• Used as the Keys and Foreign Keys for Relationship Classes• How to identify a foreign key? o It talks funny?• No, actually it ends in "EventID" and begins (usually) with the name of another Feature / Object Class. o e.g.: StructureOrIDSiteEventID o e.g.: NearestPointToLineEventID• It holds the EventID of a feature in that other class....
  14. 14. MetaData• Often described as: o "Data about Data"• But it is more completely described as: o Information that describes the content, quality, condition, origin, and other characteristics of data or other pieces of information. o Data to document and describe its subject matter; how, when, where, and by whom the data was collected; availability and distribution information; its projection, scale, resolution, and accuracy; and its reliability with regard to some standard.
  15. 15. Linear Referencing• Stationing is the standard way pipeline operators have historically stored pipeline records.• Stationing provides the mechanism to support sophisticated analysis of online features, also known as "events".• GIS Implementation of Engineering Stationing o Locates online points and lines along a Route o Locates by Route Name and Station Value o Or a Begin Station and End Station for lines.• The APDM Route is called "StationSeries"• The APDM Station attribute is: o for Points: "Station" o for Lines: "BeginStation" / "EndStation"
  16. 16. Linear Referencing• Highway Mile Post Example:• Youre driving your car along I-90. You can locate your car with a GPS or Linear referencing. What units are used? o GPS: Degrees of Latitude and Longitude- or - o Stationing: I-90 & Mile Post 12.5• Both Descriptions are valid, the stationing description may be easier to generate and search by.
  17. 17. Data Modeling and the Schema• Data Model: o A set of database design specifications for items in a GIS application. A data model describes the layers used in the application (for example, Valves, Pipes, and Identified Sites); their geometry type (point, line, or polygon); their attributes; and their data validation rules.• Schema: o The structure or design of a database or item in a database, such as a object class, feature class or relationship class. I o The schema defines the classes, the fields in each class, the relationships between fields and classes, and the grouping of items within the database.
  18. 18. The APDM - A history• Now in Version 5.0 - Were using an enhancement of Ver. 4• In existence since 2002 (Inherits from previous models.)• Based on Stationed Pipeline Data, Implemented with ESRIs measures and linear referencing• Intended as starting point for operator implementations• Intended to permit common industry wide tools• Designed to use ESRI Geodatabase technology• Intended to be 80% common with all pipeline operators• Expandable through use of Abstract Classes• Developed by operator and vendor representatives.• The APDM model and supporting documentation is freely available and accessible to everyone
  19. 19. UML - Unified Modeling Language"Secret Language which is used by International super modelsto talk to other equally super models."• Unfortunately, while this is false, UML is somewhat of a secret language and does take some patience to read and understand.• The APDM is distributed by the APDM committes in UML created in Visio. The UML enables the systematic creation, documentation and update of the APDM schema.• ESRI tools permit the creation of the APDM schema in a Geodatabase.• Reading the UML gives us an understanding of how our objects and features are constructed and related.
  20. 20. UML Concepts• Abstract Classes o a specification for subclasses that is often shown on object model diagrams to help give structure to the diagram. An abstract class is not defined in a type library and cannot be instantiated.• Inheritance o the acquisition of methods and properties by child classes or interfaces from their previously existing parent classes or interfaces. Inheritance is one of the defining characteristics of an object-oriented system.
  21. 21. UML ConceptsImportance? Allow us to create database schema with logical,consistent features with appropriate attributes. Andto update and apply them without re-doing everythingtime after time.Example: Elbow and Tee are "Concrete" Classesand Inherit from the Abstract Class "Fitting"
  22. 22. APDMAbstractClassesandsymbols
  23. 23. Core Classes"When it absolutely, positively has to bethere" in your APDM Model.......Essentially the bare minimum to make the model work.The most common classes and attributes which make theAPDM work.
  24. 24. APDM is a Data model Template• Implement the Core Classes• Add attributes to the core Classes if you want to or not.• Implement the Optional Classes if you want to or not.• Add attributes to the Optional Classes if you want to or not.• Add more classes, based on the Abstract Classes, if you want to or not.• Do all of these and make the model fit your business!
  25. 25. How did the data get into the APDM?• Data from the Legacy Systems, was loaded into the Schema using custom tools.• Some Legacy data was "massaged" before it could be loaded.• Some Legacy data had to be cleaned before it was loaded.• Some data had to be created from scratch in order to be loaded.• StationSeries were created from Control Points created from previous Routes used by the integrity group.• RAM was the primary legacy data set used to create data for the APDM.• Features were loaded along the StationSeries based upon their Route Identifier ("Location") and their Station Value(s).
  26. 26. Whats next?• Data Maintenance• Inspection Data Loading o Data Calibrator• Data Analysis o HCA / Class Location Calculator o Risk Calculator• Data Reporting o Alignment Sheet Generator o DOT Report Generator
  27. 27. Need more Information?• o••