South Dakota Statewide Geospatial Conference
October 15, 2014
Mitchell, SD
Online Sources of
Geospatial Data
Mary O’Neill
Water Resources Institute
• USGS Digital Line Graphs (DLGs)
• Created by digitizing contours on paper maps
• Vector data
• Can be used for analysis in a GIS
• USGS Digital Raster Graphics (DRGs)
• Created by scanning paper maps
• Raster data
• Useful in a GIS as a background image
A form of raster data in which each cell
contains a value that is most representative
of the elevation in that cell
• GTOPO30
• A cooperative effort involving several national and international agencies
• Shuttle Radar Topography Mission (SRTM)
• Interferometric Synthetic Aperture Radar (IFSAR) instrument aboard
Space Shuttle Endeavour
• 30-meter resolution
• ASTER
• Joint US-Japan satellite with stereoscopic imaging capability
• National Elevation Dataset (NED)
• LiDAR
• Standardized horizontal and vertical datums
• Matched edges
• Originally available at a resolution of 1 arc-second (30m)
• 60m in Alaska
• Since 2000, most of the country has been mapped as
1/3 arc-second (10m)
• Small areas are mapped as 1/9 arc-second (3m)
• Available from various websites
• National Map (USGS)
• USDA – NRCS Geospatial Data Gateway
New lidar data: The February, 2014 update of the National Elevation
Dataset (NED) 1, 1/3 and 1/9 arc-second collections was released on
February 4, 2014. This marks the 76th update of the 1 arc-second layer
since bi-monthly revisions began in June, 2000.
This update is the largest release of new light detection and ranging (lidar)
data into the NED 1/9 arc-second layer, incorporating 57,794 square miles
of new data.
The NED 1 and 1/3 arc-second layers also set high marks with 70,668
square miles of migrated high-resolution source data and 2265 square
miles of 5-meter Interferometric Synthetic Aperture Radar (IFSAR) source
data over Alaska.
All NED data are available via The National Map Viewer:
htp://viewer.nationalmap.gov/viewer/.
Bare earth digital elevation model (DEM) data from the NED, previously available
through the Seamless Server Viewer, is accessed in The National Map Viewer with
the 'Download Data' tool. Use the following procedures to download DEM data:
1. Zoom to your area of interest.
2. Click the Download Data tool near the top right corner of the viewer banner.
3. Use the current map extent, choose a reference area polygon from the Download
options dropdown menu, or create your own custom polygon.
4. Select the data theme of Elevation and product format.
5. Select available NED products, such as 2 arc-second (Alaska only), 1 arc-second
(conterminous U.S., Hawaii, Puerto Rico, portions of Alaska, western & southern
Canada along U.S. border, and all of Mexico), 1/3 arc-second (conterminous
U.S., Hawaii, and portions of Alaska), or 1/9 arc-second (in limited areas of U.S.
only).
6. Add selected products to the Cart.
7. Checkout and enter your e-mail address twice to place your order.
http://nationalmap.gov/viewer.html#download_ned
The USDA – NRCS
Geospatial Data
Gateway
Another source of NED data
…and many other
geospatial datasets
http://datagateway.nrcs.usda.gov/
Earth Explorer
http://www.csc.noaa.gov/inventory/#
 A national program managed by the USGS to acquire




high-resolution elevation data.
Backed by a comprehensive assessment of
requirements
In the early stages of implementation.
Will improve data accuracy and provide more current
data than is available in the National Elevation Dataset
(NED).
Has a goal of being operational by January 2015 and to
have complete coverage of the United States by the end
of 2022, depending on funding and partnerships.
South Dakota 3DEP Fact Sheet: The 3D Elevation
Program or 3DEP has added the "Mount Rushmore"
state to its growing selection of state-specific fact sheets
that feature the applications, benefits, and examples of
3DEP. This data is critical in such fields as agriculture,
precision farming, natural resources conservation, flood
risk management, infrastructure and construction
management, water supply and quality, and other
business uses. The South Dakota 3DEP Fact Sheet, along
with the preceding 12 state Fact Sheets, are available for
viewing and download from The National Map website.
ND Water Commission – James River
http://lidar.swc.nd.gov
USGS
http://lidar.cr.usgs.gov
International Water Institute – Red River
http://www.internationalwaterinstitute.org/lidar.htm
http://gis.rrbdin.org/lidardownload/index.html
Minnesota LiDAR Data
ftp://lidar.dnr.state.mn.us
About Landsat
http://landsat.usgs.gov/about_project_descriptions.php
GloVis
http://glovis.usgs.gov
Earth Explorer
http://earthexplorer.usgs.gov
Landsat Look
http://landsat.usgs.gov/LandsatLookImages.php
http://landsatlook.usgs.gov
About NAIP
http://www.fsa.usda.gov/FSA/apfoapp?area=home&subject=prog&topic=nai
SD Geological Survey
http://www.sdgs.usd.edu/digitaldata/index.html
Earth Explorer
http://earthexplorer.usgs.gov
About South Dakota GIS
http://arcgis.sd.gov/server/sdgis/
View and Download
http://arcgis.sd.gov/server/sdgis/Data.aspx
Questions:
Chris Marsh
State GIS Coordinator
South Dakota BIT
(605)773-6701
Phenology
http://phenology.cr.usgs.gov/get_data_250w.php
Vegetation Condition
http://eros.usgs.gov/vegetation-monitoring/vegetationcondition
National Land Cover
http://eros.usgs.gov/land-coverland-use/national-land-cover\
Topographic Research
http://eros.usgs.gov/topographic-research/rivers-and-streams
USGS Projects in Afghanistan
http://afghanistan.cr.usgs.gov/geospatial-reference-datasets
Emergency Response
http://eros.usgs.gov/hazards-disasters/emergency-response
USGS - Geospatial Datasets (by State)
http://www.usgs.gov/science/science.php?thcode=2&term=474&
n=113&order=alpha
South Dakota:
http://www.usgs.gov/science/science.php?thcode=1&term=fUS46
USGS - Science in Your Backyard: South Dakota
http://www.usgs.gov/state/state.asp?State=SD
GEOPLATFORM.gov
https://www.geoplatform.gov/node/201/%26fq%3Dmetadata_typ
e%3A%22geospatial%22%2BAND%2B
DATA.GOV
https://www.data.gov/geospatial/
** USGS - Long Term Archive
https://lta.cr.usgs.gov/products_overview
USGS - The National Map
http://nationalmap.gov/
USDA Cropland Data Layer (CDL)
About CDL
http://www.nass.usda.gov/research/Cropland/SARS1a.htm
CDL Visualization Tool - CropScape
http://nassgeodata.gmu.edu/CropScape/
USDA NRCS Geospatial Data Gateway
http://datagateway.nrcs.usda.gov/GDGOrder.aspx
USGS/NASA LP DAAC
Land Processes Distributed Active Archive Center
https://lpdaac.usgs.gov/products
USDA US Forest Service
About: http://www.fs.fed.us/visit/maps
FSGeodata Clearinghouse: http://data.fs.usda.gov/geodata/
USGS/Esri Historical Maps Cropland Data Layer (CDL)
http://historicalmaps.arcgis.com/usgs/
Sioux Falls
http://www.siouxfalls.org/gis
Rapid City
http://www.rcgov.org/GIS/
Various Counties – Beacon
http://beacon.schneidercorp.com/
The GIS Guide to Public Domain Data
Authors: Joseph J. Kerski and Jill Clark
Published by Esri Press