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Elevation Derivatives for National Applications (EDNA)

Entry ID: USGS_EDNA

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Summary

Abstract: The Elevation Derivatives for National Applications (EDNA) is a multi-layered database derived from a version of the National Elevation Dataset (NED), which has been hydrologically conditioned for improved hydrologic flow representation. The seamless EDNA database provides 30 meters resolution raster and vector data layers including:

-Aspect
-Contours
-Filled DEM
-Flow Accumulation
-Flow ... Direction
-Reach Catchment Seedpoints
-Reach Catchments
-Shaded Relief
-Sinks
-Slope
-Synthetic Streamlines

The recent completion of the National Elevation Dataset (NED) and the National Hydrography Dataset (NHD) has provided an avenue for nation-wide development of topographically derived hydrologic data layers at a scale of 1:24,000. Some of the benefits of a nation-wide development of hydrologic derivatives can be summarized as:

-The development of the EDNA database would be responsive to the need for better drainage basin boundaries for the country. The new Watershed Boundaries Dataset (WBD) strives to identify the "best-available" watersheds boundaries available on a national level. The development of the WBD is a joint project of the Advisory Committee of Water Information and the Federal Geographic Data Committee. The existing 1:250,000-scale Cataloging Unit delineations, currently, the "best-available" watershed boundaries for the country, have proven inadequate for many regional or local-level studies. Development of the EDNA derived Cataloging Unit, Watershed and Subwatershed boundaries can be used to provide high-resolution boundaries for the WBD.

-Along with development of improved, although static, Cataloging Unit boundaries and subsequent subdivision of these units into Watershed and Subwatershed units, the EDNA database will provide the capability of developing drainage basin boundaries above any point within the U.S. All locations downstream from any point in the U.S. can also be readily determined using the EDNA derivative data layers. With this information available on a national scale, impacts of pollutant spills can be easily traced through the network, drainage areas above any point (not just terminal points of pre-defined watersheds) can be determined and watershed units downstream of a point-source discharge can be easily be identified.

-Development of the EDNA database will serve to integrate two of the USGS' key national database, the NED and the NHD. Enhancements to both databases will be expected as the quality control procedures used in the development of the EDNA provide feedback to both NED and NHD. The NHD will be further enhanced by consistency with the EDNA. Elevation-derived streamline and basin parameters can be transferred onto the NHD following conflation with the EDNA. This will provide valuable attributes useful in model parameterization.

[Summary provided by the USGS.]

Description: USGS National Elevation Dataset.

Description: The National Hydrography Dataset.

Geographic Coverage

(Click for Interactive Map)

Spatial coordinates

N: 31.0

S: 29.0

E: -83.0

W: -84.0

Data Set Citation

Dataset Originator/Creator: Thomas Doyle;National Wetlands Research Center;Biological Resources Division;U.S. Geological Survey;

Dataset Title: Pine Flatwood - Marsh Ecotone Boundary data for North Florida

Dataset Release Date: 1997

Temporal Coverage

Start Date: 1992-06-01

Stop Date: 1997-09-30

Location Keywords

CONTINENT > NORTH AMERICA

CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > FLORIDA

Science Keywords

ATMOSPHERE > ATMOSPHERIC ELECTRICITY > LIGHTNING

ATMOSPHERE > ATMOSPHERIC PHENOMENA > CYCLONES > TROPICAL CYCLONES

ISO Topic Category

CLIMATOLOGY/METEOROLOGY/ATMOSPHERE

Platform

AIRCRAFT

GROUND STATIONS

Ancillary Keywords

CARBON

CARBON-14

Data Set Progress

COMPLETE

Originating Center

CDIAC

Data Center

Carbon Dioxide Information Analysis Center, Environmental Sciences Division, Oak Ridge National Laboratory, U. S. Department of Energy

Data Center URL: http://cdiac.ornl.gov/
Dataset ID: ndp057

Data Center Personnel
Name: CARBON DIOXIDE INFORMATION ANALYSIS CENTER Fax: (865) 574-2232 Contact Address: Carbon Dioxide Information Analysis Center (CDIAC) Oak Ridge National Laboratory P.O.. Box 2008 City: OAK RIDGE Province or State: TENNESSEE Postal Code: 37831-6335 Country: USA

Distribution

Distribution Media: ftp

Distribution Size: 0.2MB

Distribution Format: ASCII

Fees: None

Personnel

KNUT LOVSETH

Role: INVESTIGATOR

Contact Address:

Radiological Dating Laboratory

The Norwegian Institute of Technology

City: Trondheim

Country: Norway

GENE R. MAJOR

Role: DIF AUTHOR

Email: gsfc-gcmduso at mail.nasa.gov

REIDAR NYDAL

Role: INVESTIGATOR

Contact Address:

Radiological Dating Laboratory

The Norwegian Institute of Technology

Province or State: TRONDHEIM

Country: NORWAY

Publications/References

Nydal, R., and K. Lovseth. 1983. Tracing bomb 14C in the atmosphere,
1962-1980. J. Geophys. Res., Vol. 88, pp. 3621-42.

Nydal, R., and K. Lovseth. 1996. Carbon-14 Measurements in Atmospheric
CO2 from Northern and Southern Hemisphere Sites, 1962-1993.
ORNL/CDIAC-93, NDP-057. Carbon Dioxide Information Analysis Center,
Oak Ridge National Laboratory, Oak Ridge, Tennessee. 67 pp.

Creation and Review Dates

Last DIF Revision Date: 1997-09-09

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