[Parameters: Topic='LAND SURFACE', Term='TOPOGRAPHY', Variable_Level_1='CONTOURS']
HYDRO1k Elevation Derivative DatabaseEntry ID: HYDRO1k
Abstract: HYDRO1k is a geographic database developed to provide comprehensive and consistent global coverage of topographically derived data sets, including streams, drainage basins and ancillary layers derived from the USGS' 30 arc-second digital elevation model of the world (GTOPO30). HYDRO1k provides a suite of geo-referenced data sets, both raster and vector, which will be of value for all users who ... need to organize, evaluate, or process hydrologic information on a continental scale.
Developed at the U.S. Geological Survey's Earth Resources Observation and Science (EROS) Center, the HYDRO1k project's goal is to provide to users, on a continent by continent basis, hydrologically correct DEMs along with ancillary data sets for use in continental and regional scale modeling and analyses. Detailed descriptions of the processing steps involved in development of the HYDRO1k data sets can be found in the Readme file.
This work was conducted by the U.S. Geological Survey in cooperation with UNEP/GRID Sioux Falls. Additional funding was provided by the Brazilian Water Resources Secretariat and the Food and Agriculture Organization/Inland Water Resources and Aquaculture Service.
[Summary provided by the U.S. Geological Survey.]
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Data Set Citation
Dataset Originator/Creator: U.S. Geological Survey Earth Resources Observation and Science (EROS) Center
Dataset Title: HYDRO1k Elevation Derivative Database
Dataset Release Place: Sioux Falls, South Dakota
Dataset Publisher: LP DAACOnline Resource: http://eros.usgs.gov/#/Find_Data/Products_and_Data_Available/gtopo3...
Latitude Resolution: 1 km
Longitude Resolution: 1 km
Horizontal Resolution Range: 1 km - < 10 km or approximately .01 degree - < .09 degree
TERRESTRIAL HYDROSPHERE > SURFACE WATER > DRAINAGE > DRAINAGE BASINS
TERRESTRIAL HYDROSPHERE > SURFACE WATER > RIVERS/STREAMS
LAND SURFACE > TOPOGRAPHY > CONTOURS
LAND SURFACE > TOPOGRAPHY > LANDFORMS
LAND SURFACE > TOPOGRAPHY > TOPOGRAPHICAL RELIEF
LAND SURFACE > TOPOGRAPHY > SURFACE ROUGHNESS
LAND SURFACE > TOPOGRAPHY > TERRAIN ELEVATION
LAND SURFACE > TOPOGRAPHY > TOPOGRAPHIC EFFECTS
Quality The accuracy varies by location according to the source data. Generally, the areas derived from the raster source data have higher accuracy than those data derived from the vector source data.
Access Constraints None
Use Constraints There is no guarantee of warranty concerning the accuracy of these data. Users should be aware that temporal changes may have occurred since the data was collected and that some parts of these data may no longer represent actual surface conditions. Users should not use these data for critical applications without a full awareness of their limitations. Acknowledgement of the originating agencies would be appreciated in products derived from these data. Any user who modifies the data set is obligated to describe the types of modifications they perform. User specifically agrees not to misrepresent the data set, nor to imply that changes made were approved or endorsed by the U.S. Geological Survey. Please refer to http://www.usgs.gov/privacy.html for the USGS disclaimer.
Data Set Progress
Distribution Media: Digital Download
Distribution Format: DEM or GeoTIFF
Fees: No fees
Role: DIF AUTHOR
Phone: (301) 614-6898
Email: Tyler.B.Stevens at nasa.gov
NASA Goddard Space Flight Center Global Change Master Directory
Province or State: MD
Postal Code: 20771
Danielson, J.J., 1996. Delineation of drainage basins from 1 km African digital
elevation data. In: Pecora Thirteen, Human Interactions with the Environment -
Perspectives from Space, Sioux Falls, South Dakota, August 20-22, 1996.
Danko, D.M., 1992. The digital chart of the world. GeoInfo Systems, 2:29-36.
Defense Mapping Agency, 1992, Development of the ... Digital Chart of the World:
Washington, D.C., U.S. Government Printing Office
ESRI, 1992, "Cell based modeling with GRID", ESRI, Inc., Redlands, California.
Moore, I.D., R.B. Grayson and A.R. Ladson, 1991, Digital Terrain Modelling: A
Review of Hydrological, Geomorphological and Biological Applications. In:
Hydrological Processes An International Journal, January - March, 1991, pp. 3 -
Steinwand, D.R., Hutchinson, J.A., and Snyder, J.P. ,1995, Map projections for
global and continental data sets and an analysis of pixel distortion caused by
reprojection: Photogrammetric Engineering and Remote Sensing, v. 61, p.
Verdin, K.L., and Greenlee, S.K., 1996. Development of continental scale
digital elevation models and extraction of hydrographic features. In:
Proceedings, Third International Conference/Workshop on Integrating GIS and
Environmental Modeling, Santa Fe, New Mexico, January 21-26, 1996. National
Center for Geographic Information and Analysis, Santa Barbara, California.
Verdin, K.L., A System for Topologically Coding Global Drainage Basins and
Stream Networks. In: Proceedings, 17th Annual ESRI Users Conference, San Diego,
California, July 1997.
Extended Metadata Properties
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Creation and Review Dates
DIF Creation Date: 2004-08-06
Last DIF Revision Date: 2013-05-13