1. Preserved Digital Content: Value to Public Policy Decision Making Now and in the Future NC Geospatial Data Archiving Project (NCGDAP) North Carolina State University Libraries North Carolina Center for Geographic Information & Analysis Presented by:Steve Morris Head of Digital Library Initiatives NCSU Libraries NSDAB MeetingJuly 24, 2007

2. 96 of 100 North Carolina Counties have GIS systems as do many municipalities Over 30 state agency data producers Collection Focus: State and Local Government Geospatial Data Exceptional value –Detailed, current, accurate Exceptional risk –Inconsistent or nonexistent archiving practices –Complicated formats and complex objects Source: NC OneMap

3. Carrboro, NC : Population 17,797 (2005 est.) 22 downloadable GIS data layers 3 OGC WMS services (web services) 10 web mapping applications 9 downloadable PDF map layers

4. NCGDAP Data Types – Digital Orthophotography All 100 NC counties with orthos 1-5 flight years per county 30-300 gb per flight

5. NCGDAP Data Types – Raster to Vector 1.) GIS-ready Image Data County Orthorectified Aerial Photography 3.) GIS Layers Impervious Surfaces, Landcover Tree Type, Urban Green Space, etc 2.) Feature Extraction Semi-automated Feature Extraction: Uses Spatial Context, Image Texture, Multiple layers of data, Existing GIS layers

6. NCGDAP Data Types – Vector GIS Cadastral (tax parcels) Street centerlines Zoning Topographic contours School, sheriff, fire Voting precincts More … Detailed, accurate, current Frequently updated

7. NCGDAP Data Types – Other (now and future) Remote sensing: e.g. LIDAR data Digital cartographic products: files Digital cartographic products: web services Place-based data

8. Value in Older Data: Solving Business Problems Suburban Development 1993/2002 Near Mecklenburg-Cabarrus County border Land use change analysis Real estate trends analysis Site location analysis Disaster response Resolution of legal challengesImpervious surface maps

9. Problem: Flood and Hurricane Preparedness

10. Application: Impervious Surface Change Mapping A.B. C. D. 2002 Impervious 2004 Aerial Photography 2004 Impervious using 2002 Mask 2004 Impervious Update

11. Problem: Beach Erosion and Shoreline Change

12. Application: Shoreline Change Mapping

13. Problem: Tracking Land Use Change

14. Application: Land Use Change Mapping Input Data Output GIS Data Using Mecklenburg County 2002 true color orthorectified aerial photography Developing Areas

15. NC Geospatial Data Archiving Project (NCGDAP) Partnering with Spatial Data Infrastructure (SDI) to temporally enable geospatial work http://www.lib.ncsu.edu/ncgdap http://www.nconemap.net