Global Change Master Directory (GCMD)

Data Sets

Services / Tools

Ancillary Descriptions

Are you using a browser that doesn't support JavaScript or have you disabled JavaScript?

If you have disabled JavaScript, you must re-enable JavaScript to use this page.
Or you can view this record using the Text Only Format.

Elevation Derivatives for National Applications (EDNA)

Entry ID: USGS_EDNA

[ Update this Record ]

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.

Multimedia Sample

View full image

Geographic Coverage

(Click for Interactive Map)

Spatial coordinates

N: 76.63

S: 13.71

E: -61.48

W: -177.1

Data Set Citation

Dataset Originator/Creator: U.S. Geological Survey (USGS), EROS Center

Dataset Title: Elevation Derivatives for National Applications (EDNA)

Dataset Release Place: Sioux Falls, SD

Dataset Publisher: U.S. Geological Survey

Data Presentation Form: raster and vector digital data

Online Resource: http://edna.usgs.gov/

Location Keywords

CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA

Science Keywords

AGRICULTURE > SOILS > CALCIUM

AGRICULTURE > SOILS > CARBON

ISO Topic Category

CLIMATOLOGY/METEOROLOGY/ATMOSPHERE

Data Center

Atmospheric Chemistry and Dynamics Branch, Laboratory for Atmospheres, Earth Sciences Division, Science and Exploration Directorate, Goddard Space Flight Center, NASA

Data Center URL: http://atmospheres.gsfc.nasa.gov/acd/
Dataset ID: SHADOZ

Data Center Personnel
Name: PAWAN BHARTIA, PH. D Phone: 301-614-5731 Fax: 301-614-5903 Email: Pawan.K.Bhartia at nasa.gov Contact Address: NASA Goddard Space Flight Center Code 613.3, Bldg 33 City: Greenbelt Province or State: MD Postal Code: 20771 Country: USA

Creation and Review Dates

DIF Creation Date: 2009-06-03

Last DIF Revision Date: 2009-06-09

Reformat as FGDC document

View Text Only Format

[ Update this Record ]