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Advancing Geospatial Data Preservation in North Carolina: Insights from the NCGDAP Initiative

The North Carolina Geospatial Data Archiving Project (NCGDAP) aims to preserve state and local geospatial content, engaging spatial data infrastructure for effective archiving. Launched in October 2004, this collaboration between NCSU Libraries and the North Carolina Center for Geographic Information and Analysis focuses on improving data management practices and fostering industry discussions. The project emphasizes the importance of capturing at-risk data, utilizing technology for feature extraction, and enhancing accessibility to enable local agencies and data producers to manage and preserve geospatial resources efficiently.

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Advancing Geospatial Data Preservation in North Carolina: Insights from the NCGDAP Initiative

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  1. Collecting Digital Content Going Forward: Lessons Learned and New InitiativesNC Geospatial Data Archiving Project (NCGDAP)North Carolina State University LibrariesNorth Carolina Center for Geographic Information & AnalysisPresented by: Steve MorrisHead of Digital Library Initiatives NCSU Libraries NDIIPP Partners Meeting July 10, 2008

  2. NC Geospatial Data Archiving Project • Partnership between university library (NCSU) and state agency (NCCGIA), started Oct. 2004 • Focus on state and local geospatial content in North Carolina (statedemonstration) • Tied to NC OneMap initiative, which provides for seamless access to data, metadata, and inventories • Goal: Engage spatial data infrastructure (SDI) in data preservation and archiving Demonstration repository as catalyst for an industry conversation

  3. Who?

  4. Who? • NCSU Libraries • Capture at-risk data, demonstration repository • Explore technical and organizational challenges • Catalyze discussion, generate learning experience • State/Local agencies, State Archives • Data Producers: Improved temporal data management practices • Archives: More efficient means of acquiring and preserving data; progress towards best practices

  5. Who: Commercial Data Producers and Vendors Project Status Cultivating a commercial market for older data. Part of “permanent access” is marketing, advertising, and putting older data into the path of the user

  6. What?

  7. 2.) Feature Extraction 1.) GIS-ready Image Data 3.) GIS Layers Semi-automated Feature Extraction: Uses Spatial Context, Image Texture, Multiple layers of data, Existing GIS layers CountyOrthorectified Aerial Photography Impervious Surfaces, Landcover Tree Type, Urban Green Space, etc What: Traditional Geospatial Data Types Raster/Image Data Vector Data Focus on “Framework” Data Layers

  8. What: Cartographic Products and Other Outputs • GIS Software • Software project file (.mxd, .apr, …) • Data layer file (.avl, .lyr, …) • PDF, GeoPDF map exports • Web Services-based representations

  9. What: Place-based Data Street Views Oblique Imagery 3D Images Tax Dept. Photos • Present-day value in location-based services and mobile applications • Future value for cultural heritage, descriptions of places

  10. Why?

  11. Why: Solving Business Problems Land use change analysis Site location analysis Real estate trends analysis Disaster response Resolution of legal challenges Impervious surface maps Suburban Development 1993/2002 Near Mecklenburg-Cabarrus County border

  12. Why: Cultural Heritage and Emotional Connection Pronounced local agency interest in archiving, digitizing, and geo-referencing older analog products

  13. When? (and How Often?)

  14. When: Frequency of Capture Surveys • How often should continually changing vector datasets be captured? • Tap into data custodian understanding of production patterns and uses • Tap into local innovation • Learn about local business drivers for data archiving • Survey subjects: • 2006 and 2008 surveys of NC cities and counties • 2008 survey of archival practice in state agencies in NC • Planned survey of data users in NC

  15. When: Frequency of Capture Surveys • 2006 survey did more to socialize the problem of digital preservation within the data custodian community than any other project effort. • Four points of engagement in survey process: • Survey formulation in consultation with advisory bodies • Announcement of survey • Survey completion by data custodians/producers • Survey reports

  16. Where?

  17. Where: Data Archive Locations • In State • Data producers: Better temporal data management • State Archives: Selected authoritative records • Libraries: Derivatives and variants? • Out of State • GeoMAPP Project – Multi-state exchange • Participation in NDIIPP content exchanges • Role for federal government? National Map?

  18. How?

  19. How: Leveraging Spatial Data Infrastructure • Data inventories support content identification • Metadata standards support discoverability and use • Content standards support data interoperability over time and help eliminate semantic confusion • Data exchange networks: • Minimize need to make contact • Add technical, administrative, descriptive metadata • Establish rights and provenance

  20. How: Archiving as Part of Data Community Discussion • Recommendation: • “Establish archive and long term data access strategies” • Suggested best practices include: • “Establish a policy and procedure for the provision of access to historic data, especially for framework data layers.” Nov. 2007 NC Geographic Information Coordinating Council (GICC) released: Ten Recommendations in Support of Geospatial Data Sharing

  21. How: GICC Archival and Long Term Access Committee • Initiated in response to agency requests for guidance on temporal data management • County, municipal, state, federal, and regional representation • Key focus: Best practices for data snapshots and retention

  22. Moving Forward • GICC Archival and Long-Term Access Committee • GeoMAPP – NDIIPP Multi-state geospatial project (NC, KY, UT) • Open Geospatial Consortium (OGC) Data Preservation Working Group • Vendor engagement

  23. Thanks! Steve Morris Head, Digital Library Initiatives NCSU Libraries Steven_Morris@ncsu.edu NCGDAP: http://www.lib.ncsu.edu/ncgdap/

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