1. 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
NDIIPP Partners Meeting
July 26, 2007

2. State and Local Government Geospatial Data
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

3. 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

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

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

6. 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

7. Suburban Development 1993/2002
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

8. Value in Older Data: Cultural Heritage
Future uses of data are difficult to
anticipate (as with Sanborn Maps)

9. Stewardship: Repository as Catalyst for Conversation
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
NCGDAP survey of county and municipal geospatial data archiving practice
August 2006
57.6%
survey
response rate
Survey targeted all 100 counties and the 25 largest municipalities in NC

10. 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