Wyoming Water Resources Data System (WRDS) (comp.)
TriHydro Corporation (ed.)
Spring 2003
Wind/Bighorn River Basin Plan - Fourth Level Hydrologic Unit Code (HUC) Boundaries
vector digital data
Cheyenne, Wyoming
Wyoming Water Development Commission
The TriHydro Corporation located in Laramie, Wyoming altered the extent, coordinate system and data format of this dataset. Alterations were made to to meet the requirements set forth by the Wyoming Water Development Commission for the Wind/Bighorn Water Basin Plan. See Supplemental Information under the Description section or Process Description under the Process Step for details.
http://waterplan.state.wy.us
Steeves, Peter and Douglas Nebert; modified by Tom Kohley, Wyoming Water Resources Center
August 1994
wbhhuc4basins
Reston, Virginia; Laramie, Wyoming
U.S. Geological Survey; University of Wyoming Spatial Data and Visualization Center
<url: http://www.sdvc.uwyo.edu/clearinghouse/huc250.html>
wbh_huc4_basins
The Geographic Information Retrieval and Analysis System
(GIRAS) was developed in the mid 70s to put into digital
form a number of data layers which were of interest to the
USGS. One of these data layers was the Hydrologic Units. The
map is based on the Hydrologic Unit Maps published by the
U.S. Geological Survey Office of Water Data Coordination,
together with the list descriptions and name of region,
subregion, accounting units, and cataloging unit. The
hydrologic units are encoded with an eight- digit number
that indicates the hydrologic region (first two digits),
hydrologic subregion (second two digits), accounting unit
(third two digits), and cataloging unit (fourth two digits).
The data produced by GIRAS was originally collected at a
scale of 1:250,000.
This data set is a modification for Wyoming of the original
United States HUC data produced by the USGS. The primary
modifications made in this data set by the Wyoming Water Resources
Center include 1) removal of hydrologic units that do not drain
within Wyoming and 2) modification of the hydrologic unit boundaries
to better encompass streams and lakes represented in the 1:100,000 scale
Digital Line Graph (DLG) of surficial hydrography. The HUC
boundaries have not been "clipped" to the Wyoming border, in order
to maintain the natural boundaries of the units.
This metadata has also been altered from original USGS
metadata to be more specific for Wyoming.
The HUC dataset was compiled originally to provide the
National Water Quality Assessment (NAWQA) study units with
an intermediate- scale river basin boundary for extracting
other GIS data layers. The data can also be used for
illustration purposes at intermediate or small scales
(1:250,000 to 1:2 million).
This modified dataset was produced under contract with the
Wyoming Game and Fish Department for the purpose of wildlife
habitat prioritization in Wyoming.
The dataset's original extent, coordinate system, and data format have been altered. The dataset has been clipped to the extents of the Wind-Bighorn-Clark's Fork 4th level hydrologic unit code watershed boundaries. The coordinate system has been changed to Lat/Long NAD 1927, and the data format has been converted from an ESRI coverage to an ESRI shapefile. These data alterations occurred in the Spring of 2003 for use in the Wyoming Water Development Commission's Wind/Bighorn River Basin Plan.
en
1994
publication date
None planned
-111.054932
-107.060371
45.006821
42.466934
-111.054932-107.06037142.46693445.006821
None
HUC
GIRAS
hydrologic unit
watershed
Wind River
Bighorn River
water basin
None
Wyoming
Wind River Basin
Bighorn Water Basin
Clark's Fork
none
These data were digitized at a scale of 1:250,000 and use of these boundaries
with larger scale data (i.e. 1:24k hydrography) is not recommended as it would
be beyond the resolution capabilities of the data set.
Although the boundaries of the hydrologic units were modified to best match the
1:100,000 scale surficial hydrography DLG, these data should not be considered a
1:100,000 scale product.
Mark Negri
U.S. Geological Survey, Water Resources Div. (WRD)
Computer Specialist, Spatial Data Support Unit
mailing address
12201 Sunrise Valley Drive, MS-445
Reston
VA
20191
USA
703-648-5613
703-648-5295
mnegri@usgs.gov
6:30am-3:30pm EST
May contact thru email or telephone
USGS Water Resources Division; Tom Kohley, U. of Wyoming
Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 3; ESRI ArcCatalog 9.3.1.1850
Shapefile
Label point accuracy was checked by making a point cover
of polygon labels from the 1:2,000,000 HUC coverage and then
doing an identify of those points in the 1:250,000 scale HUC
polygon. This procedure looked for both new or missing
polygons, and was also used to check attribute values. Both coverages
were also dissolved by accounting unit and comparisons made of the number
and location of remaining polygons and corrections made.
See Explanation
Attribute accuracy is described, where present, with each attribute defined
in the Entity and Attribute Section.
Polygon and chain-node topology present.
complete to USGS level four hydrologic unit code
The line work for the HUC coverage was checked against the line work
from:
(1) the 1:2,000,000 HUC coverage by plotting both data sets out on one
large graphic (about 1:3,000,000). No major discrepancies were found
except in coastal areas where the 1:2,000,000 scale coverage had more
detail than the 1:250,000 scale coverage.
(2) line work from 1:24,000 scale digitized drainage basins in Colorado,
Illinois, and New Jersey. The match was generally good with departures
generally less than 2500 meters. The biggest departures were in Colorado
and were as large as 4000 meters.
(3) line work from the 1:2,000,000 scale rivers coverage for the USA
by plotting both data sets out on one large graphic (about 1:3,000,000).
In general the nesting of streams in HUCs was good and HUC boundaries
intersected steams at stream intersections.
(4) line work from 1:100,000 scale streams from Colorado, Illinois, and
Kansas. The nesting of streams in HUCs was very good. Stream arcs for
the most part did not cross HUC arcs except at stream intersections.
The error (distance from intersection to HUC line) between HUC lines
and stream intersection was less than 500 meters at all intersections
checked (about 25).
US Geological Survey
unknown
GIRAS
250000
digital
unknown
publication date
GIRAS
main source
Procedures described in this section pertain to conterminous US data:
The data was recieived as compressed giras tar files representing either a
1:250,000-scale (1:250K) quadrangle or a 1:100,000-scale (1:100K) quadrangle. Each
file was named after its respective quadrangle. A coverage of 1:250k quadrangles was
used to divide the country up into four sections and get a list of names for each section.
Using GIRASARC2, an aml designed to create an ARC/INFO data-set (coverage)
from a GIRAS file and a corresponding neat line coverage.
After the files for a given section were all converted into ARC/INFO format,
the outer edge (original neatline) was selected and deleted and the
mathematically-calculated neatline coverage from the
GIRASNEAT AML program was copied in. The original neatline was replaced
with a calculated neatline because in all cases, the outline of the
coverage quad never quite conformed to a "true" neatline causing overlaps
and gaps between adjacent maps. The new neatline was connected to the internal
arcs where they intersected. Lines which did not quite join the new neatline
were extended to the edge with a maximum tolerance of 500 meters.
All extensions were made within this tolerance. All arcs which extended beyond
the new neatline were clipped off. All coverages were checked for additional
dangles and then a MAPJOIN was run using NET as the feature option.
Finally, most map edgelines were removed from the MAPJOINed coverage
to create a seamless basin coverage with polygons (basins) and arcs
(boundaries) with attributes.
Errors found in the HUC250 coverage published as OFR 94-0326.
Citation U.S. Geological Survey, 1990. Land Use and Land Cover
Digital Data from 1:250,000- and 1:100,000-Scale Maps. Data
Users Guide 4, 33 pp, Reston Virginia.
1995
Modifications made by the Wyoming Water Resources Center (WWRC):
The WWRC modified the original Hydrologic Unit database by first
removing all units that did not drain within the state of Wyoming.
For the # remaining units in the state, the boundaries of each unit
were modified to better represent the actual drainage area. The hydrologic
units for Wyoming were compiled at a scale of 1:250,000 and are often overlaid
with the 1:100,000 scale surficial hydrography DLG to produce maps of basin wide
hydrography. The overlay of these two layers within the GIS often identified
areas where a stream or lake intersected the boundary of the hydrologic unit due
(most likely) to the difference in map scale between the two GIS layers
To remove the intersections between hydrologic unit boundaries and streams/lakes
in the hydrography DLG, we first assumed that the 1:100,000 scale DLG
information was more spatially accurate than the 1:250,000 scale hydrologic unit
boundaries. Using this assumption, we modified only the hydrologic unit
boundaries in ArcEdit using the hydrography DLG as a background coverage for
reference. Elevation (e.g. DEM) was not used as a reference coverage. Changes
made to the unit boundaries consisted mostly of boundary extensions in order
encompass streams that were in the upper portions of each basin. No new
boundaries were added and none were removed.
1996
The dataset's original extent, coordinate system, and data format have been altered. The dataset has been clipped to the extents of the Wind-Bighorn-Clark's Fork 4th level hydrologic unit code watershed boundaries. The coordinate system has been changed to Lat/Long NAD 1927, and the data format has been converted from an ESRI coverage to an ESRI shapefile. These data alterations occurred in the Spring of 2003 for use in the Wyoming Water Development Commission's Wind/Bighorn River Basin Plan.
The TriHydro CorporationGIS Department307-745-7474307-745-7729GIS@trihydro.comMonday through Friday, 8:00a.m. to 5:00 p.m.
Dataset copied.2010070116264000
Vector
G-polygon
19
SimplePolygonFALSE19FALSEFALSE
0.000000
0.000000
Decimal degrees
North American Datum of 1927
Clarke 1866
6378206.400000
294.978698
GCS_North_American_1927
wbh_huc4_basins
Feature Class19
FID
Internal feature number.
ESRI
Sequential unique whole numbers that are automatically generated.
FIDOID400
Shape
Feature geometry.
ESRI
Coordinates defining the features.
ShapeGeometry000
HUC
HUCNumber8
REG_NAME
REG_NAMEString50
SUB_NAME
SUB_NAMEString50
ACC_NAME
ACC_NAMEString50
CAT_NAME
CAT_NAMEString50
ACRES
ACRESNumber16
REGION
REGIONString2
SUBREGION
SUBREGIONString2
ACCTUNIT
ACCTUNITString2
CATUNIT
CATUNITString2
For definition of drainage basins, there are two principal
tabular data elements of interest. The first, "HUC", stands
for the Hydrologic Unit Code and includes the 8-digit
cataloging unit as assigned to the basin polygon by the U.S.
Geological Survey. The original dataset also contained an
attribute, "SOURCE", an attribute of each bounding line segment
(arc), incorporating a code to define the source and scale of the
source linework. However, in the modifications made specifically
to Wyoming, these arc attributes were lost. Reference should be
made to the original HUC data available from USGS for this
information.
Names for regional units, subregion units, accounting units and
cataloging units were added for each of the polygons encompassing
Wyoming, as well as the acreage associated with each unit. These
attributes are called REG_NAME, SUB_NAME, ACC_NAME, CAT_NAME
and ACRES, respectively.
Not Available
Wyoming Water Resource Data System (WRDS)
Coordinator
mailing address
University of Wyoming
P.O. Box 3943
Laramie
Wyoming
82071
USA
307-766-6651
307-766-3785
wrds@uwyo.edu
Monday through Friday,8 a.m. to 5 p.m., Mountain Standard Time
Fourth level hydrologic unit code (HUC) boundaries in the Wind/Bighorn River Basin Planning Area
These data were generated for use in conjunction with the Wind/Bighorn River Basin Plan. The Wyoming Water Development Commission (WWDC) and the Water Resources Data System (WRDS) do not warrant, endorse, or recommend the use of these data for any other purpose. The user assumes the entire risk related to the use of these data. WWDC and WRDS are providing these data "as is," and WWDC and WRDS disclaims any and all warranties, whether expressed or implied, including (without limitation) any implied warranties of merchantability or fitness for a particular purpose.
ESRI Shapefile (SHP)
Spring 2003
no compression applied
0.243
0.149
http://waterplan.state.wy.us
Instructions are provided on-line for downloading and importing this data
CD-ROM
ESRI Shapefile (SHP) format
No fees are required for downloading the data that is on-line. Minimal fees may be required to cover the costs of a CD-ROM.
20101005
mailing address
P.O. Box 4008 University Station
Laramie
Wyoming
82071
USA
307-766-2735
meh@uwyo.edu
Monday through Friday, 8 a.m. to 5 p.m., Mountain Standard Time
Margo BerendsenWyoming Geographic Information Science Center
FGDC Content Standards for Digital Geospatial Metadata
FGDC-STD-001-1998
local time
enhttp://www.esri.com/metadata/esriprof80.htmlESRI Metadata Profile
2010070116264000FALSE20101005155408002010100515540800{13EB695C-35FE-4058-A27F-4C2AFDD7D84F}DefineProjection K:\WWDC\WindBighornUpdate\6-0_Studies_and_Reports\WWDC_GIS_Final\Shapefiles\wbh_huc4_basins.shp GEOGCS['GCS_North_American_1927',DATUM['D_North_American_1927',SPHEROID['Clarke_1866',6378206.4,294.9786982]],PRIMEM['Greenwich',0.0],UNIT['Degree',0.0174532925199433]] K:\WWDC\WindBighornUpdate\6-0_Studies_and_Reports\WWDC_GIS_Final\Shapefiles\wbh_huc4_basins.shpMicrosoft Windows XP Version 5.1 (Build 2600) Service Pack 3; ESRI ArcCatalog 9.3.1.1850wbh_huc4_basins-111.054932-107.06037145.00682142.4669341-111.054932-107.06037145.00682142.4669341ISO 19115 Geographic Information - MetadataDIS_ESRI1.0dataset002file://\\WRDS-SHELLFISH\C\Documents and Settings\cnichol5\Desktop\2010_WB_GIS\Shapefiles\wbh_huc4_basins.shpLocal Area Network0.149ShapefileGCS_North_American_19271920101005