Transcript NCSU Libraries Geospatial Data Services Jeff Essic 515-5698

NCSU Libraries
Geospatial Data Services
Jeff Essic
Data Services Librarian
DH Hill Library
[email protected]
515-5698
Libraries GIS Services
• Data Resources
– Networked
– In Library
• Assistance
– Finding & Getting Data
– Using Data & Software
• Workstations & Software
• Virtual Campus Courses
• http://www.lib.ncsu.edu/
data/gis/
Virtual Campus
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Free to NCSU faculty, staff, students
80+ courses and workshops
15-25 hours per course
Includes exercises with provided data & software
Certificate for course completion
http://www.lib.ncsu.edu/stacks/gis/virtcamp.html
Popular Virtual Campus Courses
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Learning ArcGIS 8.x, Part I and Part II
Learning ArcGIS Spatial Analyst
Creating, Editing, and Managing Geodatabases
Introduction to Visual Basic 6
Exploring Marine Science with
ArcGIS
• Introduction to ArcView 3.x
• Understanding Map Projections and Coordinate
Systems
Networked Data Access at NCSU
• Geodata Server
– Mapped drive from Windows, Mac
map to roanoke.lib.ad.ncsu.edu
– FTP
(ftp://gisdata.lib.ncsu.edu)
– HTTP (Web)
for off campus access, requires authentication
http://www.lib.ncsu.edu/stacks/gis/geodata.html
Data Distribution
• Federally produced unclassified data is publicdomain
• State, local, and commercial data are held by
NCSU under distribution agreements that limit
their use to NCSU affiliated users for educational
purposes only.
• Distribution of data for “un-seeable” features
(underground infrastructure) is being stopped for
homeland security.
Factors in Choosing Geospatial Data
1. Source - Fed, state, local, international, other
2. Extent - watershed, Census tract, county, state, etc.
3. Age - 1-2 years old vs. 3-7 vs. 8 or more
4. Data accuracy and scale - positional and Attribute
5. File size - How much free space do you have?
6. Attribute availability
7. Metadata availability
8. File/Image Format
9. Projection and Datum
10. Use Restrictions
Federal Data Sources
• Federal data is public-domain and easily
downloaded from numerous websites.
• http://www.geodata.gov - Federal data portal
linked to agency data sources
• http://nationalatlas.gov - Interactive mapping and
download
• http://nationalmap.usgs.gov - Cascading Map
Server
State Data Sources
• NC Center for Geographic Info. & Analysis
– Wide range of data, over 100 different layers
– Scale: mostly 1:24,000 to 1:100,000
– Available to NCSU via geodata server
• NC DOT
– http://www.ncdot.org/planning/statewide/gis
– DOT data, contours, FEMA flood, ’93 aerial photos,
USGS DRG’s,
• NCSU PrecisionAg (Soil Science)
- http://www.precisionag.ncsu.edu/
- Census, DLG, NRCS soils, ’98 Color IR Orthophotos
Local Data Layers and Sources
• Typical layers include parcels, street centerlines,
digital orthophotos, miscellaneous districts,
zones, infrastructure, and cultural features.
• Sources:
– Download from the Web
– Available from the library
– Acquire directly from the city/county.
http://www.lib.ncsu.edu/stacks/gis/counties.html
Feature Data Acquisition Status
Other Data Sources
• Council of Governments, Ex/ Regional open
space
• Utilities
• University Faculty and Peers
• Commercial data products, usually originate from
govt. sources, but are value added
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Maptech
Delorme
National Geographic
Geolytics
Digital
Orthophotos
Census Data Resources-Web
• Download TIGER shapefiles from
http://www.esri.com/data/download/census2000_
tigerline/index.html
- Some basic tables can be downloaded here too
• Generate tables from
- American Factfinder: (http://factfinder.census.gov/) or
- NC State Data Center (http://census.state.nc.us/)
- Be sure to get a geographic ID field to join your tables to
the shapefiles.
Recent Acquisitions
• Delorme’s Xmap 4.5
– Complete US coverage of DRGs
on an external hard drive, plus
3-D viewing available at DH Hill GIS workstation
• Maptech’s DigitalCharts
– NOAA digitized Nautical
Charts and photos
- Norfolk VA to Florida plus
Intracoastal Waterway
LIDAR
• LIght Detection And Ranging.
• Measure distance, speed, rotation, chemical
composition/concentration of a remote object
• Airborne LIDAR for the flood mapping program
has been collected for 2/3 of NC.
• This data can be processed for many different
applications
• Symposium being planned
for May 14
NC OneMap
NCFloodmaps.com
• Web Data Viewer
• Property/Flood Zone
Lookup Tool
• Data Download Tool
– flood zones
– state govt. data
– local govt. data
– 20 and 50ft. ASCII
digital elevation data
National Digital Information Infrastructure
Program Proposal (NDIIPP)
• NDIIPP is a Library of Congress effort focused on
preservation of digital resources.
• Our proposal focuses on NC state/local geospatial
data partnering with CGIA.
• Try to acquire data, document it with preservation
metadata, and ingest it into digital repository for long
term maintenance, investigate new protocols.
• Content: feature data, imagery, digital maps, tabular
• 3 year grant--$1 million+ project, 4-6 total awards. Slim
chance of us receiving, but we’re still in the running
Contact
Jeff Essic
Data Services Librarian
[email protected]
515-5698
DH Hill Library, Research & Information Services
http://www.lib.ncsu.edu/data/gis