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Building Footprint Data Collection and Processing Evolution

Learn about the history, standards, implementation, and lessons in building footprint data collection. Discover next steps and efficient data management techniques.

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Building Footprint Data Collection and Processing Evolution

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  1. Building Footprint Data Collection and Processing Allen Sparks Enterprise GIS Program Resource Information Management Division National Information Services Center Office of the Chief Information Officer 2008 GIS & Data Management Conference

  2. Presentation Outline • History of the Buildings Standard • Buildings Data Model Implementation • Initial Data Collection Efforts • Lessons learned • Next Steps 2008 GIS & Data Management Conference

  3. History of the Buildings Standard • Buildings chosen as “low-hanging fruit” • Standards team formed • Standard developed through multi-year process • Regional GIS programs agree to support effort • Implementation started FY2007 2008 GIS & Data Management Conference

  4. Buildings Data Model Original Model 2008 GIS & Data Management Conference

  5. Buildings Data Model Implemented Model 2008 GIS & Data Management Conference

  6. Initial Data Collection • Geodatabase & Shapefile templates • Rudimentary Upload/Download Workflow • Simple Summary Statistics • Documentation • Support (Contact Form) 2008 GIS & Data Management Conference

  7. Access to External Data • FMSS • Read-only Direct Access to Oracle DB • SQL Server Integration Services (SSIS) to Replicate Data. (Session 19) • Efficient & Easily Repeatable • LCS • Unable to Obtain Direct Access • Manual Extract/Transform/Load • Generate 3 Reports – Save as Access97 • Load from Access97 into SQL Server • Inefficient & Error-Prone 2008 GIS & Data Management Conference

  8. Creating Park Templates • Model Builder used to: • Query FMSS & LCS extracts • Create schema and relationships • VBScript generated • Command line wrapper • 4-6 hours to create templates for all parks 2008 GIS & Data Management Conference

  9. Download / Upload • Active Directory Organizational Unit • EGIS “OU” • Park Groups used for Access Control • Scripts for creation and management of groups • Read, or Edit (Upload) Access • Folder structure with Access Control Lists (ACLs) containing EGIS Groups 2008 GIS & Data Management Conference

  10. Download / Upload • Active Directory Organizational Unit 2008 GIS & Data Management Conference

  11. Download / Upload • http://egis.nps.gov • EGIS Contacts Table • Simple Table in SQL Server • Doesn’t Support 1:Many User:Park relationships • “Primary” users get Upload access • ‘Data Grabber” Web Page • Integrated Windows Authentication • User selects Park, then Dataset • Uploaded data placed in folder • Email sent to RIMD Staff • All transactions logged 2008 GIS & Data Management Conference

  12. EGIS Contacts Table 2008 GIS & Data Management Conference

  13. Download / Upload Overview 2008 GIS & Data Management Conference

  14. Download / Upload Overview 2008 GIS & Data Management Conference

  15. 2008 GIS & Data Management Conference

  16. NPS System Viewer http://insidemaps.nps.gov/npssystemviewer 2008 GIS & Data Management Conference

  17. Completion Statistics (20080401) 2008 GIS & Data Management Conference

  18. Lessons Learned • Database Model • Highly “Normalized” is good for data integrity, but increases complexity of data development; • Solutions: • Simplify the Model; • Develop Tools for Loading and Validating Data; • Tools would need to be Model-Specific • Generalize the Model and develop tools • ** Reusable Model and Tools ** 2008 GIS & Data Management Conference

  19. Lessons Learned • Database Model • Requests for minor revisions to standard • Polygon_Type, Point_Type • Map_Method • Position_Error • Opportunity to simplify model • Remove Subtypes • Move link fields to Buildings Table • Some re-coding of data required • Implications for data distribution • need to deliver transformed data back to the field 2008 GIS & Data Management Conference

  20. Lessons Learned Data Collection and Distribution • Download / Upload is labor intensive • ** Current process does not support delivery of existing Building Footprints to parks • Current Solution is Not Scalable / Sustainable for Multiple Simultaneous Theme Collection Efforts • Solutions: • Improve Download / Upload Process (Interim) • Use Distributed Geodatabase technology • Leverage Lessons Learned by Dave Best • Collaboration with Army Corps of Engineers 2008 GIS & Data Management Conference

  21. Lessons Learned • Data Display • Basemap Performance • It is not feasible to develop a service-wide basemap with reasonable performance • A commercial-service is required • Currently using ESRI ArcWebServices 2008 GIS & Data Management Conference

  22. Next Steps • Database Standard and Model • Publish comments and responses to proposed standard revision • Final revision to model • Publish on Data Store • Transform Existing Data into New Model 2008 GIS & Data Management Conference

  23. Evolution of the Model 2008 GIS & Data Management Conference

  24. Next Steps • Data Collection / Distribution • Revise Process for Generating GDBs • Generate New GDBs and Shapefiles • Update Documentation • Begin a new Data Collection Cycle 2008 GIS & Data Management Conference

  25. Next Steps • Data Display • Revisions to System Viewer • See Session 24 (Nate Irwin) • ArcGIS 9.3 Services • Microsoft Virtual Earth Basemap 2008 GIS & Data Management Conference

  26. Park Media Future “Generic” Standard 2008 GIS & Data Management Conference

  27. Questions? 2008 GIS & Data Management Conference

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