Current Area Directly Influenced by the Lower Mississippi River

May 9, 2014 (Last modified May 8, 2017)
Uploaded by Yvonne Allen
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Description:
This data used HUC-12 boundary dataset (below) along with elevation, levee and inundation frequency datasets to define an area that is directly affected by changes in river level on the Lower Mississippi River.  Used in the GCPO CPA to determine habitat suitable for alligator gar spawning. 


This data set is a complete digital hydrologic unit boundary layer to the Subwatershed (12-digit) 6th level for the entire United States. This data set consists of geo-referenced digital data and associated attributes created in accordance with the "Federal Guidelines, Requirements, and Procedures for the National Watershed Boundary Dataset; Chapter 3 of Section A, Federal Standards, Book 11, Collection and Delineation of Spatial Data; Techniques and Methods 11-A3" (04/01/2009). http://www.ncgc.nrcs.usda.gov/products/datasets/watershed/index.html . Polygons are attributed with hydrologic unit codes for 4th level sub-basins, 5th level watersheds, 6th level subwatersheds, name, size, downstream hydrologic unit, type of watershed, non-contributing areas and flow modification.
Data Provided By:
US. Fish and Wildlife Service. 

U.S. Department of Agriculture, Natural Resources Conservation Service, National Cartography and Geospatial Center
Content date:
1980, unknown
Contact Organization:
US Fish and Wildlife Service.

U.S. Department of Agriculture, Natural Resources Conservation Service, National Cartography and Geospatial Center
Contact Person(s):
not specified
Use Constraints:
The distributor shall not be held liable for improper or incorrect use of this data, based on the description of appropriate/inappropriate uses described in this metadata document. It is strongly recommended that this data is directly acquired from the distributor and not indirectly through other sources which may have changed the data in some way. These data should not be used at scales greater than 1:24,000 for the purpose of identifying hydrographic watershed boundary feature locations in the U.S.A. The NRCS should be acknowledged as the data source in products derived from these data. The Watershed Boundary Dataset is public information and may be interpreted by all organizations, agencies, units of government, or others based on needs; however, they are responsible for the appropriate application of the data. Federal, State, or local regulatory bodies are not to reassign to the Natural Resources Conservation Service any authority for the decisions they make. The Natural Resources Conservation Service will not perform any evaluations of these maps or purposes related solely to State or local regulatory programs. Photographic or digital enlargement of these maps to scales greater than that at which they were originally delineated can result in misrepresentation of the data. If enlarged, the maps will not include the fine detail that would be appropriate for mapping at the small scale. Digital data files are periodically updated. Files are dated, and users are responsible for obtaining the latest version of the data from the source distributor.
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FGDC Standard Metadata XML
Click here to see the full FGDC XML file that was created in Data Basin for this layer.
Original Metadata XML
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Dataset Type:
Layer Package
Tags:
alligator, huc, hydrologic units, huc12, sub-region, watershed boundaries, hydrologic unit code, watershed boundary dataset, basin, subwatershed, mississippi, region, watershed, boundaries, wbd, sub-basin, gar, river
Downloaded by 11 Members
Bookmarked by 2 Members
Included in 3 Public Maps
Included in 4 Public Galleries

About the Uploader

Yvonne Allen
Spatial Ecologist with USFWS

Spatial Ecologist with a passion for remote sensing and floodplains