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Preserved Digital Content: Collections, Value, and Stewardship 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.
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Preserved Digital Content: Collections, Value, and StewardshipNC 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 26, 2007
Collection Focus: State and Local Government Geospatial Data • 96 of 100 North Carolina Counties have GIS systems as do many municipalities • Over 30 state agency data producers • Exceptional value • Detailed, current, accurate • Exceptional risk • Inconsistent or nonexistent archiving practices • Complicated formats and complex objects Source: NC OneMap
Carrboro, NC : Population 17,797 (2005 est.) 22 downloadable GIS data layers 10 web mapping applications 3 OGC WMS services (web services) 9 downloadable PDF map layers
NCGDAP Data Types – Vector GIS • Detailed, accurate, current • Frequently updated • Cadastral (tax parcels) • Street centerlines • Zoning • Topographic contours • School, sheriff, fire • Voting precincts • More …
NCGDAP Data Types – Digital Orthophotography • All 100 NC counties with orthos • 1-5 flight years per county • 30-300 gb per flight
NCGDAP Data Types – Other (now and future) Digital cartographic products: web services Digital cartographic products: files Remote sensing: e.g. LIDAR data Place-based data
Value in Older Data: 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
Value in Older Data: Cultural Heritage Future uses of data are difficult to anticipate (as with Sanborn Maps)
Stewardship: Repository as Catalyst for Conversation NCGDAP survey of county and municipal geospatial data archiving practice August 2006 Repository Goal • Capture at-risk data • Explore technical and organizational challenges Project End Goal • Data Producers: Improved temporal data management practices • Archives: More efficient means of acquiring and preserving data 57.6% survey response rate Survey targeted all 100 counties and the 25 largest municipalities in NC
Stewardship: Informing Other Infrastructure • NC GIS Inventory • Efficient data identification • Adding preservation elements Orthophoto Data Distribution System Efficient transfer of large quantities of imagery • NC OneMap Data Download and Viewer • Public access • Data visualization Street Centerline Data Distribution System Efficient transfer of data from 100 counties, with metadata and clarified rights