Steeves, Peter and Douglas Nebert
1994
huc250k
1
vector digital data
Open-File Report
94-0236
Reston, Virginia
U.S. Geological Survey
http://water.usgs.gov/lookup/getspatial?huc250k
huc250k
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
1:250K. Some areas, notably major cities in the west, were
recompiled at a scale of 1:100K. In order to join the data together
and use the data in a geographic information system (GIS) the data
were processed in the ARC/INFO GUS software package. Within the
GIS, the data were edgematched and the neatline boundaries between
maps were removed to create a single data set for the conterminous
United States.
NOTE: A version of this data theme that is more throughly
checked (though based on smaller-scale maps) is available here:
http://water.usgs.gov/lookup/getspatial?huc2m
HUC, GIRAS, Hydrologic Units, 1:250
This data set 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).
Procedures_Used:
The data was recieved 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, it was quickly discovered that many
of the quad names were to long for the program (i.e. sault_saint_marie)
and a generic naming system for files and coverages was incorporated. In
1 of 10 cases, the name of the quadrangle did not correspond with the name
of the file. These problems were traced down and corrected (after all four
sections were converted there were many files left over...these wound up be
all the 1:100k quads which did not have similar names to the 1:250k
files).
After the files for a given section were all converted into ARC/INFO
format, a loop aml was run which copied a coverage and its neatline
cover into temporary storage (there was not enough room in info to
deal with a large number of files in one directory), attached to
that directory, built line topology, and went into the editor, ARCEDIT.
In ARCEDIT, the outer edge (original neatline) was selected and deleted an
the mathematically-calculated neatline coverage from the GIRASNEAT AML
program was copied in using the ARCEDIT GET command. 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 gapes 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 within
a 500 meter tolerance as arguments to the CLEAN command into a separate
directory. Both the neatline and huc coverages were deleted from the
temporary space, and the program looped to the next coverage.
Another program was then run which added an item to the .aat called OUTER,
went into INFO, and populated the attribute for all arcs composing the
new neatline. This was done by reselecting for the identity of the polygon
to the left or right of each arc whose value was "1", the identity of the
outer "universe" polygon (reselect lpoly# = 1 or rpoly# = 1 in the .aat and
calculated outer to = 1). All coverages were checked for additional
dangles and then a MAPJOIN was run using NET as the feature option.
Finally, most map edge lines were removed from the MAPJOINed coverage
using the DISSOLVE to create a seamless basin coverage with polygons
(basins) and arcs (boundaries) with attributes.
Quality control methods were applied to the resulting coverage by detecting
and fixing node and label errors and remaining neat line arc problems
(i.e. long neat lines still in the coverage). Many more problems arose
in the western part of the country than in the east. Bordering HUC code
disagreements between quads caused a number of cases in which neatlines
did not dissolve. These were provisionally corrected for the most part,
however there were several cases that required external review and editing
to fix, and are now incorporated in the final data set. After all 1:250K
sections were completed, the same procedure was run for the handful of
1:100k quads. These were mapjoined with the 1:250k quads to provide more
detailed coverage where it was available.
Revisions:
Revision #1a.
Process_Date 05/2006
The total number of HUCs in the 1:250k, - there are 2111 cataloging units
in the lower 48 states. The following:
18 regions,
204 subregions
324 accounting units
2111 cataloging units
HUC 03100103 was added because it was missing. This HUC is on the Gulf coast near Tampa Fl.
and the 1:2mil version was used as a digitizing guide.
HUC 17100304 had to be split in 2; the northern part retained the existing HUC code of 17100304
and the southern portion was assigned 17100306.
Huc Code 14060001 was assigned to 2 HUCs, one was correct and the other was reassigned to 14060002.
I redefined the HUC codes to be character, so the leading zero of all regions less than 10 could
be assigned. I also redefined the datatype of the REG, SUB, ACC anc CAT fields to
all be character, so leading zeros could be assigned. I also redid the SUB, ACC and CAT assignments
to reflect what they really are; for example, a SUB region is suppose to consist of 4 characters
but the original version only allowed 2, the ACC (accounting units) are suppose to consist of 6 characters,
but the original version only allowed 2 and the CAT (cataloging units) are suppose to consists
of all 8 characters, but the original version only allowed 2.
The following is the link to the offical Alaska 1:250k HUC cover:
http://agdc.usgs.gov/data/projects/anwr/metadata/akhuc.html
Revision #1. See above for all the details
Process_Date 10/92
Revision #2. Seattle and Bakersfield quadrangles were missing
from the composite supplied by Pete Steeves. These were manually
pasted in using Arcedit with small tolerances. Labelerrors were
remedied and most dangles were removed using the Eliminate command.
Process_Date 1/93
Revision #3. The following changes were made to a
1:250,000-scale version derived from National Mapping Divisions
Geographic Information Retrieval and Analysis System (GIRAS) data.
The discrepancies in the hydrologic unit codes (HUCs) in California
were changed because the California State Hydrologic Unit Map (HUM)
was revised in 1978 but the 1:250,000-scale digital dataset was not.
This has been reviewed by Bill Battaglin, Doug Nebert, and Paul
Kapinos and is noted under Reviews (#6 below).
The areas in which the HUC labels were incorrect in California were
180701, 180702, 180703, 180600, 180300, and 180400. Boundaries were
added in 180702 and 180600 from the 1:2 million source. Along the
Oregon/California border, a boundary was added in 180102. In Wyoming,
a boundary was added in 100902 from the 1:2 million source. Labels
were corrected in these HUCs to reflect state updates, and where
necessary, to add new labels to the newly-drawn boundaries. Map edges
were manually removed in Arkansas, California, and along the
Oregon/California border.
After the changes were made and saved in Arcedit, the build and clean
commands were executed, followed by labelerrors. Three polygons had
duplicate labels and were corrected. The labels were centered in the
polygons by the centroidlabels command. Verification of the coverage
was done by the describe command.
Process_Date 12/93.
Revision #4. The NAMES file was added to the data set and its
attributes were defined in the ATT file of the documentaton. This
table is a lookup table to correlate the 8-digit numbers with verbose
names officially assigned to the basins.
Process_Date 3/94.
Revision #5. The following corrections were made to the 1:250,000-scale
coverage of Hydrologic Unit Codes (HUC250):
Valid HUC code, 7140103, added to HUC250.NAM. Bourbeuse, Missouri.
HUC250.NAM was sorted on HUC.
HUC frequency >1, tiny polygons were deleted that were erroneous:
17010212 deleted small poly to NW of main poly
10130305 deleted small poly to S of main poly
10230005 deleted small poly to S of main poly
14020001 deleted small poly to N of main poly
15050201 deleted small poly to W of main poly
04080203 deleted small poly to N of main poly
03120001 deleted small poly to S of main poly
Invalid HUC codes, not in names file, were corrected:
18020023 HUC should be 18020111 (in N-central California)
18070010 HUC should be 18070303 (in so. California)
15010017 HUC should be 15010007, delete arc separating it
(in nw Arizona)
1870201 HUC should be 18070201 (in so. California, missing an 0)
1870204 HUC should be 18070204 (in so. California, missing an 0)
18060012 HUC should be 18060011 (in so. California,
improper polygon closure)
18060011 HUC label added after polygon closure of 18060011
HUC frequency >1, larger polys were checked and corrected:
18020126 western poly is 18020108 in HUC2M (CA)
18050005 southern poly is 18050006 in HUC2M (CA)
18060006 split into 2 polys, no apparent reason, delete arc
splitting polys (CA)
04110001 and 04100001 together are 04100001 in HUC2M (MI)
(MAPEDGE was deleted)
02080108 northwestern poly is 02080208 in HUC2M (VA)
The invalid HUC codes, and 7140103 were found by relating to the
HUC250.NAM file, and identifying polygons with no match in the names
file. The rest were found by looking at the 96 polygons which had
HUC codes with frequencies >1 in the PAT. Most of these seemed to
be correct, and were along the US-Canada boundary, or were islands
along the coasts.
These errors were found in the HUC250 coverage published as OFR 94-0326.
Process_Date 12/94 & 1/95
Reviews_Applied_to_Data:
Peer review, 10/18/93, Bill Battaglin, USGS-WRD, Lakewood, Co, memo to
Doug Nebert:
----------------------------------------------------------------------
"I have completed a review of the 1:250,000 scale hydrologic units coverage
(HUC) and found the digital data and metadata to be of high quality. I
have a few suggested improvements to the digital data and to the
documentation. Below is a summary of the methods I used to check feature
accuracy in the digital data base and the problems I found.
Digital Features:
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 inter-
sected steams at stream intersections. In some places (SE New Mexico,
SE California and NW Utah), the streams coverage does not match the HUC
coverage that well, but this could easily be because of the unusual nature
of streams in these areas or because of inaccuracies in the streams coverage.
(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).
Problems with Line work:
(1) There was a very large number of very short arcs in the coverage (3211
Lt 1000 meters long and 1729 Lt. 100 meters long). Most of these arcs were
internal (did not border on outside polygon) and coded as 250k edges(3)
(almost 3000) but some were 250k (2) lines and one was a 2m dlg (4). Arcs
with lengths of less than 100 meters (maybe even less than 1000 meters) are
difficult to deal with when editing subsets of the coverage, and they also
add to the overall size of the database. I know many of these lines were
created in the process of edgematching the quads, but I think the informa-
tion content of these very short arcs is less valuable than the hassle and
overhead involved in keeping them in the coverage.
(2) The edit distance for the coverage was set to a very small value.
This may have been required for earlier processing, however, it makes
the finished coverage difficult to work with. I had to reset the edit
distance to a larger value when I wanted to select arcs in ARCEDIT
interactively. This, of course, will be one of the things users will
want to do with the new HUC coverage.
Polygon labels/attributes:
(1) 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. I also dissolved both coverages by accounting unit and compared
the number and location of remaining polygons.
Problems with labels/attributes:
(1) I discovered a total of 649 places where the HUC codes from the label
point of the 1:2,000,000 coverage did not match the HUC code for the
1:250,000 HUC polygon that it fell within. As you had indicated in the
documentation, there were a lot of differences in California. The 2m HUC had
lots of label points resulting from islands, bays, and estuaries that are
not included in the 1:250,000 scale HUC coverages. In other places the
polygons seemed to be the same but the HUC codes were different. For example
HUC 18020111 in the 1:2,000,000 coverage is coded as HUC 18020023 in the
1:250,000 coverage. There were also many differences in the Great Lakes.
It seems odd that the 1:2,000,000 coverage should have more detail with
regard to coastal features than the 1:250,000 scale coverage has. There
were also internal polygon label differences in Minnesota (7100001 in 250k,
70200001 in 2m), Colorado (10090204 in 250k, 10180007 in 2m), Illinois
(mistake in the 2m HUC I think), and Louisiana (11140203 in 250k, 11140202
in 2m). Texas and Florida also have a few that look like they should be
checked.
(2) The dissolved 1:2,000,000 coverage contained 350 accounting unit
polygons while the dissolved 1:250,000 HUC coverage only contained 177.
There were large differences in the way the Accounting unit polygons
looked in the Great Lakes Region, and in parts of California, Wyoming,
and Florida. Again, many of the differences result from the use of a
cruder coastline in the 1:250,000 scale HUC coverage.
Coverage Documentation:
The coverage documentation was reviewed both editorially and for overall
completeness. The documentation was editorially sound and did not need any
corrections.
Problems with the Documentation:
(1) The redefined items in the pat file were not defined in the data
dictionary portion of the documentation file.
(2) The complete reference to the source material for the data is not in the
documentation file."
Response to Peer review by Bill Battaglin, 1/5/93, Doug Nebert,USGS-WRD
Reston
----------------------------------------------------------------------
Data were reviewed for attribute accuracy against a 1:2million base through
random audit of polygon features. Line attributes were verified by symbol-
ization on the screen. Regions were shaded in to verify correct polygon
values for HUC at the Hydrologic Region level. Documentation was updated.
The short arcs along the quadrangle boundaries were kept in the data set
due to the importance of maintaining as much original information as
possible. Basin codes were updated and additional erroneous neatlines
removed.
Peer review, 11/10/93, Doug Nebert, USGS-WRD, Reston, memo to Paul Kapinos:
---------------------------------------------------------------------------
"As you are aware, we have several digital versions of the hydrologic unit
maps for the United States and I am in the process of verifying and publishi
a 1:250,000-scale version derived from National Mapping Division Geographic
Information Retrieval and Analysis System (GIRAS) data as part of their land
use mapping program of the 1970s and early 1980s.
In comparing the 1:250,000-scale data reviewers noticed differences in both
basin definition and hydrologic unit codes in Southern California and in the
San Joaquin valley. The 1974 state map, at 1:500,000-scale agrees with the
1:250,000-scale GIRAS data in boundaries and numbers, whereas the 1:2.5 mill
"wall map" of the U.S. agrees with the 1:2,000,000 digital data set. Both p
maps are authoritative sources of information, but apparently something chan
between the two maps.
On a related note, it is worthwhile to mention that the 1:2.5 million-scale
wall map for the western U.S. is being revised to include new Alaska hydrolo
unit codes before reprinting. It would be wise to be sure that the boundari
depicted there are also the authoritative ones.
I would appreciate your review and adjudication of the California hydrologic
unit definitions in order for us to publish this digital data set. Please
provide a written response (e-mail and paper copy) and marked-up maps as to
which basins and boundaries are current."
Peer review, 11/29/93, Paul Kapinos, USGS-WRD, memo to Doug Nebert:
-------------------------------------------------------------------
"The discrepancies in the hydrologic unit codes (and some boundaries)
in the State of California are due to the fact that the California
State Hydrologic Unit Map (HUM) was revised in 1978 but the 1:250,000-scale
digital data set was not. The events that most likely occurred can be
summarized as follows:
o The 1:500,000-scale HUMs were published by OWDC over a period of about
four years between 1974 and 1978.
o The National Mapping Division (NMD) overlaid the hydrologic unit
boundaries on their 1:250,000-scale land-use and land-cover map
series after each State HUM was completed, and later digitized these
boundaries and their respective codes.
o In 1978, the State of California asked OWDC to revise the hydrologic
unit boundaries and codes in the central valley.
o The 1:500,000-scale California HUM was revised and reprinted but NMD
was either not informed of the revisions or chose not to revise or
redigitize their 1:250,000-scale overlays.
o Once all the HUMs were printed (including the 1978 revisions of
California and South Dakota), the 1980 1:2.5 million-scale United
States wall map was published using the up-to-date (1978) boundaries
and codes.
Based on the above summary, I would recommend using the boundaries
and codes from the 1:2.5 million-scale map and the 1:2,000,000 digital
data set. Please be aware that other hydrologic unit boundaries and/or
codes may have been revised when individual State HUMs were reprinted
by OWDC. I doubt if there has been any attempt to update any of the
digital data sets with these changes."
Response to Peer Review by Paul Kapinos, Doug Nebert 2/14/94:
-------------------------------------------------------------
The areas in question in California were updated to reflect the more
current information as contained in the 1:2 million data set. Polygon
hydrologic unit codes were updated in the Central Valley and in coastal
Southern California. Where necessary, 1:2 million-scale linework was
substituted to define the correct basin boundaries where no corresponding
information was available at a different scale.
Related_Spatial_and_Tabular_Data_Sets:
Any data set which has hydrologic unit codes as part of their data may
be able to use this data.
-------------------------------------------------------------
Export format Update 10/20/2008
Curtis Price (cprice@usgs.gov) created a "zip" version of this
coverage as follows:
1. Downloaded huc250k.e00.gz, gunzip
2. arc import cover huc250k.e00 huc250k
3. copy huc250k huc250k2 double
4. build huc250k2 poly
5. createworkspace distr\huc250k
6. copy huc250k2 distr\huc250k\huc250k double
7. Used MS Windows XP (right click send to zip file) to create
file huc250k.zip from the distr folder
Other_References_Cited:
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.
Notes:
en
1994
(Here you put information defining how the time period of
content information, on the DOC file, was determined)
(Here you pick one of the following entries that describes
how often changes or additions are made to the data set.
Pick one, and delete the rest)
Continually
Daily
Weekly
Monthly
Annually
Unknown
As Needed
Irregular
None planned
-127.906135
-65.321907
51.646272
22.875722
-2356125.000000
2258682.500000
269700.906250
3176995.000000
None
hydrologic unit
watersheds
inlandWaters
None
Conterminous United States
None
None
None
None
(describe any restrictions or legal prerequisites for accessing
the data set. Put "None" if there are no restrictions)
These data were digitized at a scale of 1:250,000 with some portions
of coverage at 1:100,000- and 1:2 million scale. Limitations of
the data strictly revolve around this scale input. 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.
(Here you acknowledge the agencies and organizations that gave
you money, resources, and encouragement to digitize the data and
to enter all this wonderful metadata.)
None
Unclassified
None
ESRI ArcCatalog 9.3.0.1770
Shapefile
See Entity_Attribute_Information
See Explanation
Attribute accuracy is described, where present, with each
attribute defined in the Entity and Attribute Section.
Polygon and chain-node topology present.
(Information in wordy narrative form describing omissions,
selection criteria, generalization, definitions used, and other
rules applied to derive the data set)
(An explanation of the accuracy of the horizontal coordinate
measurements and a description of tests used, if any, to
determine horizontal positional accuracy. This is different
from horizontal resolution as reported in the DOC file.
Positional accuracy defines how correctly the digital features
match real-world features and woiuld be related to the concept
of the National Map Accuracy Standard -- xx% of well-defined
point features fall within xx units of their true position.
The resolution is the smallest unit of measure the GIS can
reliably manage without truncation or rounding.)
(The same as above, but for vertical information that may
be encoded with the 2-D features such as cell or contour
estimates of a vertical dimension. A description of the
contour interval of input data and its basis could be described
here.)
Unspecified
0000
Unspecified
250,000 and 100,000
Unspecified
0000
Unspecified
Unspecified
Unspecified
ELIMINATE HUC250E HUC250F KEEPEDGE POLY
withheld
19930107
0959
withheld
BUILD HUC250F LINE
withheld
19930107
1000
withheld
RENAME HUC250F HUC250
withheld
19930107
1156
withheld
DOCUMENT HUC250 UPDATE DDNEBERT
withheld
19930107
1158
withheld
DOCUMENT HUC250 UPDATE DDNEBERT
withheld
19930107
1237
withheld
COPY /HOME2A/RESDGS1/DDNEBERT/HUC250/HUC250 HUC250
withheld
19930107
1245
withheld
COPY HUC250 /DSDL1/CUSA/TILES/CUSA/HUC250
withheld
19930111
0917
withheld
EXPORT COVER /DSDL1/CUSA/TILES/CUSA/HUC250 HUC250.E00
withheld
19930113
1030
withheld
DOCUMENT HUC250 UPDATE DDNEBERT
withheld
19930713
1210
withheld
DOCUMENT HUC250 UPDATE DDNEBERT
withheld
19930713
1211
withheld
DOCUMENT HUC250 UPDATE DDNEBERT
withheld
19930713
1213
withheld
DOCUMENT HUC250 UPDATE DDNEBERT
withheld
19930713
1219
withheld
DOCUMENT HUC250 UPDATE DDNEBERT
withheld
19930713
1225
withheld
DOCUMENT HUC250 UPDATE DDNEBERT
withheld
19930713
1228
withheld
DOCUMENT HUC250 UPDATE DDNEBERT
withheld
19930713
1238
withheld
DOCUMENT HUC250 UPDATE DDNEBERT
withheld
19930713
1240
withheld
COPY /DSDL1/CUSA/TILES/CUSA/HUC250 HUC250
withheld
19931102
1403
withheld
ARCEDIT /DSDL2/JPORTER/HUC250
withheld
19931129
1441
withheld
ARCEDIT /DSDL2/JPORTER/HUC250
withheld
19931130
1444
withheld
ARCEDIT /DSDL2/JPORTER/HUC250
withheld
19931130
1458
withheld
ARCEDIT /DSDL2/JPORTER/HUC250
withheld
19931201
0848
withheld
ARCEDIT /DSDL2/JPORTER/HUC250
withheld
19931201
0908
withheld
ARCEDIT /DSDL2/JPORTER/HUC250
withheld
19931201
1317
withheld
ARCEDIT /DSDL2/JPORTER/HUC250
withheld
19931206
0826
withheld
ARCEDIT /DSDL2/JPORTER/HUC250
withheld
19931206
1111
withheld
ARCEDIT /DSDL2/JPORTER/HUC250
withheld
19931206
1436
withheld
ARCEDIT /DSDL2/JPORTER/HUC250
withheld
19931206
1503
withheld
ARCEDIT /DSDL2/JPORTER/HUC250
withheld
19931207
0749
withheld
ARCEDIT /DSDL2/JPORTER/HUC250
withheld
19931207
0825
withheld
ARCEDIT /DSDL2/JPORTER/HUC250
withheld
19931207
0840
withheld
ARCEDIT /DSDL2/JPORTER/HUC250
withheld
19931208
1119
withheld
ARCEDIT /DSDL2/JPORTER/HUC250
withheld
19931208
1123
withheld
ARCEDIT /DSDL2/JPORTER/HUC250
withheld
19931208
1138
withheld
TOLERANCE HUC250
withheld
19931208
1427
withheld
CLEAN HUC250 HUC250C 50 10
withheld
19931208
1509
withheld
LABELERRORS HUC250C
withheld
19931214
0753
withheld
ARCEDIT /DSDL2/JPORTER/HUC250C
withheld
19931214
0836
withheld
BUILD HUC250C
withheld
19931214
0843
withheld
LABELERRORS HUC250C
withheld
19931214
0843
withheld
CENTROIDLABELS HUC250C INSIDE
withheld
19931214
0850
withheld
RENAME HUC250C HUC250
withheld
19931220
1410
withheld
DOCUMENT HUC250 UPDATE JPORTER
withheld
19931221
0934
withheld
DOCUMENT HUC250 UPDATE JPORTER
withheld
19931221
1007
withheld
DOCUMENT HUC250 UPDATE JPORTER
withheld
19931221
1105
withheld
DOCUMENT HUC250 UPDATE JPORTER
withheld
19931221
1153
withheld
DOCUMENT HUC250 UPDATE JPORTER
withheld
19931221
1222
withheld
DOCUMENT HUC250 UPDATE JPORTER
withheld
19931221
1235
withheld
DOCUMENT HUC250 UPDATE JPORTER
withheld
19931221
1324
withheld
DOCUMENT HUC250 UPDATE JPORTER
withheld
19931221
1341
withheld
DOCUMENT HUC250 UPDATE JPORTER
withheld
19931221
1401
withheld
DOCUMENT HUC250 UPDATE JPORTER
withheld
19931221
1416
withheld
DOCUMENT HUC250 UPDATE JPORTER
withheld
19931221
1422
withheld
DOCUMENT HUC250 UPDATE JPORTER
withheld
19931221
1426
withheld
DOCUMENT HUC250 UPDATE JPORTER
withheld
19931221
1430
withheld
IMPORT COVER HUC250 HUC250
withheld
19940117
1651
withheld
DOCUMENT HUC250 UPDATE DDNEBERT
withheld
19940117
1716
withheld
DOCUMENT HUC250 UPDATE DDNEBERT
withheld
19940117
1744
withheld
DOCUMENT HUC250 UPDATE DDNEBERT
withheld
19940307
1259
withheld
EXPORT COVER HUC250 /DSDL1/CUSA/DATABASE/WAIS/HUC250.E00
withheld
19940411
1056
withheld
EXPORT COVER /DSDL1/CUSA/TILES/CUSA/HUC250 HUC250
withheld
19940411
1546
withheld
EXPORT COVER HUC250 HUC250_CUSA.E00
withheld
19941017
1112
withheld
JPORTER COPY /DSDL1/CUSA/TILES/CUSA/HUC250 /HOME/GIS/JPORTER/HUC/HUC250
withheld
19941220
1045
withheld
JPORTER ARCEDIT /HOME/GIS/JPORTER/HUC/HUC250
withheld
19941220
1242
withheld
JPORTER BUILD HUC250 POLY
withheld
19941220
1246
withheld
JPORTER ARCEDIT /HOME/GIS/JPORTER/HUC/HUC250
withheld
19941220
1300
withheld
JPORTER BUILD HUC250 POLY
withheld
19941220
1303
withheld
JPORTER ARCEDIT /HOME/GIS/JPORTER/HUC/HUC250
withheld
19941220
1308
withheld
JPORTER BUILD HUC250 POLY
withheld
19941220
1311
withheld
JPORTER ARCEDIT /HOME/GIS/JPORTER/HUC/HUC250
withheld
19941220
1408
withheld
JPORTER BUILD HUC250 POLY
withheld
19941220
1411
withheld
JPORTER DOCUMENT HUC250 UPDATE JPORTER
withheld
19941221
1043
withheld
JPORTER DOCUMENT HUC250 UPDATE JPORTER
withheld
19941221
1107
withheld
JPORTER ARCEDIT /HOME/GIS/JPORTER/HUC/HUC250
withheld
19941221
1245
withheld
JPORTER BUILD HUC250 POLY
withheld
19941221
1248
withheld
JPORTER ARCEDIT /HOME/GIS/JPORTER/HUC/HUC250
withheld
19941221
1441
withheld
JPORTER BUILD HUC250 POLY
withheld
19941221
1444
withheld
JPORTER EXPORT COVER /HOME/GIS/JPORTER/HUC/HUC250 HUC250.DEC
withheld
19941222
1203
withheld
JPORTER EXPORT COVER /HOME/GIS/JPORTER/HUC/HUC250 HUC250
withheld
19950120
0821
withheld
JPORTER ARCEDIT /HOME/GIS/JPORTER/HUC/HUC250
withheld
19950127
0910
withheld
JPORTER CLEAN HUC250
withheld
19950127
0930
withheld
JPORTER ARCEDIT /HOME/GIS/JPORTER/HUC/HUC250
withheld
19950127
1010
withheld
JPORTER ARCEDIT /HOME/GIS/JPORTER/HUC/HUC250
withheld
19950127
1012
withheld
JPORTER BUILD HUC250
withheld
19950127
1015
withheld
JPORTER ARCEDIT /HOME/GIS/JPORTER/HUC/HUC250
withheld
19950127
1033
withheld
JPORTER BUILD HUC250
withheld
19950127
1036
withheld
JPORTER ARCEDIT /HOME/GIS/JPORTER/HUC/HUC250
withheld
19950127
1050
withheld
JPORTER BUILD HUC250
withheld
19950127
1053
withheld
JPORTER ARCEDIT /HOME/GIS/JPORTER/HUC/HUC250
withheld
19950127
1115
withheld
JPORTER BUILD HUC250
withheld
19950127
1118
withheld
JPORTER ARCEDIT /HOME/GIS/JPORTER/HUC/HUC250
withheld
19950127
1356
withheld
JPORTER BUILD HUC250 POLY
withheld
19950127
1400
withheld
JPORTER ARCEDIT /HOME/GIS/JPORTER/HUC/HUC250
withheld
19950127
1408
withheld
JPORTER BUILD HUC250 POLY
withheld
19950127
1411
withheld
JPORTER IDEDIT HUC250 POLY
withheld
19950127
1544
withheld
JPORTER BUILD HUC250 POLY
withheld
19950130
1022
withheld
JPORTER EXPORT COVER /HOME/GIS/JPORTER/HUC/HUC250 HUC250
withheld
19950131
1013
withheld
JPORTER ARCEDIT /HOME/GIS/JPORTER/HUC/HUC250
withheld
19950410
1033
withheld
JPORTER BUILD HUC250 POLY
withheld
19950410
1038
withheld
JPORTER DOCUMENT HUC250 UPDATE JPORTER
withheld
19950410
1048
withheld
JPORTER DOCUMENT HUC250 DELETE JPORTER
withheld
19950410
1049
withheld
JPORTER DOCUMENT HUC250 COPY /DSDL1/CUSA/TILES/CUSA/HUC250 JPORTER
withheld
19950410
1051
withheld
MNEGRI COPY ~JPORTER/HUC/HUC250 HUC250
withheld
19950411
1310
withheld
MNEGRI ARCSDTS HUC250 HUC250SDTS.TGZ PREF
withheld
19950411
1424
withheld
MNEGRI ARCSDTS HUC250 HUC250.SDTS.TGZ PREF
withheld
19950412
0920
withheld
MNEGRI EXPORT COVER HUC250 HUC250.E00
withheld
19950412
0932
withheld
MNEGRI EXPORT COVER HUC250 HUC250.E00
withheld
19950428
0832
withheld
MNEGRI ARCSDTS HUC250 HUC250.SDTS.TGZ PREF
withheld
19950428
0951
withheld
MNEGRI EXPORT COVER HUC250 /SCRATCH_AREA1/MNEGRI/HUC250.E00 NONE
withheld
19950919
1725
withheld
cprice converted .e00 file to .zip archive (see Supplementary Information)
withheld
20081020
1725
withheld
Metadata imported.
withheld
20081020
16593300
Vector
Simple
FALSE
0
TRUE
FALSE
coordinate pair
0.000000
0.000000
meters
North American Datum of 1927
Clarke 1866
6378206.400000
294.978698
GCS_North_American_1927
NAD_1927_Albers
Selection3
HUC POLYGONS
GIRAS DATA
Feature Class
0
OBJECTID
OBJECTID
OID
4
0
0
Internal feature number.
Esri
Sequential unique whole numbers that are automatically generated.
Shape
Shape
Geometry
0
0
0
Feature geometry.
ESRI
Coordinates defining the features.
AREA
AREA
Double
8
0
0
PERIMETER
PERIMETER
Double
8
0
0
HUC250K_
HUC250K_
Integer
4
0
0
HUC250K_ID
HUC250K_ID
Integer
4
0
0
HUC_CODE
HUC_CODE
String
8
0
0
HUC_NAME
HUC_NAME
String
39
0
0
REG
REG
String
2
0
0
SUB
SUB
String
4
0
0
ACC
ACC
String
6
0
0
CAT
CAT
String
8
0
0
Shape_Length
Shape_Length
Double
8
0
0
Length of feature in internal units.
Esri
Positive real numbers that are automatically generated.
Shape_Area
Shape_Area
Double
8
0
0
Area of feature in internal units squared.
Esri
Positive real numbers that are automatically generated.
HUC250.AAT
HYDROLOGIC UNIT LINEWORK
GIRAS DATA
' FNODE#'
Internal number of from-node
Computed
Sequential unique positive integer
unspecified
unspecified
' TNODE#'
Internal number of to-node
Computed
Sequential unique positive integer
unspecified
unspecified
' LPOLY#'
Internal number of polygon to left of arc
Computed
Sequential unique positive integer
unspecified
unspecified
11
RPOLY#
Internal number of polygon to right of arc
Computed
Sequential unique positive integer
unspecified
unspecified
11
LENGTH
Length of arc in coverage units
Computed
Positive real numbers
unspecified
unspecified
HUC250#
Internal feature number
Computed
Sequential unique positive integer
unspecified
unspecified
HUC250-ID
User-assigned feature number
User-defined
Integer
unspecified
unspecified
SOURCE
LINE CODING FOR UNIQUE CASES
GIRAS AND 1:2M DLG DATA
1=100K 2=250K 3=250K EDGE 4=2MILLION DLG
unspecified
unspecified
HUC250.LEFTRIGHT
Names of Hydrologic Cataloging Units (HUC)
U.S. Geological Survey, Office of Water Data Coordination
HUC
Hydrologic Unit Code
U.S. Geological Survey as FIPS standard
Integer 8-digit codes defined uniquely for each basin
unspecified
unspecified
NAME
Hydrologic Unit Name
U.S. Geological Survey as FIPS standard
Integer 8-digit codes defined uniquely for each basin
unspecified
unspecified
11
11
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 second item,
"SOURCE", is an attribute of each bounding line segment (arc) and
incorporates a code to define the source and scale of the source
linework. Because this data set includes linework from different
scale sources, it is important to recognize the presence and use
of this item in quality evaluation.
The SOURCE item has four special codes to describe the source linework.
Code 1 stands for all arcs that were from 1:100,000 scale GIRAS files
and were internal to the quadrangle (no neatlines). Code 2 stands for
all arcs from the 1:250,000-scale GIRAS files which were internal to
the quadrangle. Code 3 is for lines from either GIRAS source scale but
were part of the neatline which may be used to connect arcs that
dont join cleanly between quads. Code 4 is for linework in the southern
Central Valley and southern Coastal California where the GIRAS data
were replaced with 1:2 million scale basin boundaries.
A companion NAMES file (HUC250.NAMES) is provided with this data set
to allow a user to perform a temporary join between the basin polygons
and display or query basins based on their assigned text names rather
than just the basin number (HUC).
Not Available
U.S. Geological Survey
Ask USGS - Water Webserver Team
mailing
445 National Center
Reston
VA
20192
1-888-275-8747 (1-888-ASK-USGS)
http://answers.usgs.gov/cgi-bin/gsanswers?pemail=h2oteam&subject=GIS+Dataset+huc250k
Although this data set has been used by the U.S. Geological
Survey, U.S. Department of the Interior, no warranty expressed or
implied is made by the U.S. Geological Survey as to the accuracy
of the data and related materials. The act of distribution shall not
constitute any such warranty, and no responsibility is assumed by
the U.S. Geological Survey in the use of this data, software, or
related materials.
Any use of trade, product, or firm names is for descriptive
purposes only and does not imply endorsement by the U.S.
Government.
ESRI shapefile
folder of binary data files
zip
20.6
50.856
http://water.usgs.gov/GIS/dsdl/huc250k_shp.zip
ArcInfo Workspace (folder)
ArcInfo Coverage (binary data files)
zip
12.2
50.856
http://water.usgs.gov/GIS/dsdl/huc250k.zip
ArcInfo Interchange File (EXPORT, .e00)
ArcInfo Coverage
zip
16.5
50.856
http://water.usgs.gov/GIS/dsdl/huc250k.e00.zip
Spatial Data Transfer Standard
tar archive containing SDTS binary files
GNU zip
11.4
50.856
http://water.usgs.gov/GIS/dsdl/huc250k.sdts.tgz
ArcInfo Interchange File (EXPORT, .e00)
Region 01 New England
GNU zip
443
50.856
http://water.usgs.gov/GIS/dsdl/huc01_250k.e00.gz
Spatial Data Transfer Standard
Region 01 New England (tar archive of SDTS/TVP files)
GNU zip
443
50.856
http://water.usgs.gov/GIS/dsdl/huc01_250k.sdts.tgz
ArcInfo Interchange File (EXPORT, .e00)
Region 02 Mid-Atlantic
GNU zip
675
50.856
http://water.usgs.gov/GIS/dsdl/huc02_250k.e00.gz
Spatial Data Transfer Standard
Region 02 Mid-Atlantic (tar archive of SDTS/TVP files)
GNU zip
675
50.856
http://water.usgs.gov/GIS/dsdl/huc02_250k.sdts.tgz
ArcInfo Interchange File (EXPORT, .e00)
Region 03 South Atlantic-Gulf
GNU zip
1150
50.856
http://water.usgs.gov/GIS/dsdl/huc03_250k.e00.gz
Spatial Data Transfer Standard
Region 03 South Atlantic-Gulf (tar archive of SDTS/TVP files)
GNU zip
1150
50.856
http://water.usgs.gov/GIS/dsdl/huc03_250k.sdts.tgz
ArcInfo Interchange File (EXPORT, .e00)
Region 04 Great Lakes
GNU zip
968
50.856
http://water.usgs.gov/GIS/dsdl/huc04_250k.e00.gz
Spatial Data Transfer Standard
Region 04 Great Lakes (tar archive of SDTS/TVP files)
GNU zip
968
50.856
http://water.usgs.gov/GIS/dsdl/huc04_250k.sdts.tgz
ArcInfo Interchange File (EXPORT, .e00)
Region 05 Ohio
GNU zip
954
50.856
http://water.usgs.gov/GIS/dsdl/huc05_250k.e00.gz
Spatial Data Transfer Standard
Region 05 Ohio (tar archive of SDTS/TVP files)
GNU zip
954
50.856
http://water.usgs.gov/GIS/dsdl/huc05_250k.sdts.tgz
ArcInfo Interchange File (EXPORT, .e00)
Region 06 Tennessee
GNU zip
327
50.856
http://water.usgs.gov/GIS/dsdl/huc06_250k.e00.gz
Spatial Data Transfer Standard
Region 06 Tennessee (tar archive of SDTS/TVP files)
GNU zip
327
50.856
http://water.usgs.gov/GIS/dsdl/huc06_250k.sdts.tgz
ArcInfo Interchange File (EXPORT, .e00)
Region 07 Upper Mississippi
GNU zip
1050
50.856
http://water.usgs.gov/GIS/dsdl/huc07_250k.e00.gz
Spatial Data Transfer Standard
Region 07 Upper Mississippi (tar archive of SDTS/TVP files)
GNU zip
1050
50.856
http://water.usgs.gov/GIS/dsdl/huc07_250k.sdts.tgz
ArcInfo Interchange File (EXPORT, .e00)
Region 08 Lower Mississippi
GNU zip
570
50.856
http://water.usgs.gov/GIS/dsdl/huc08_250k.e00.gz
Spatial Data Transfer Standard
Region 08 Lower Mississippi (tar archive of SDTS/TVP files)
GNU zip
570
50.856
http://water.usgs.gov/GIS/dsdl/huc08_250k.sdts.tgz
ArcInfo Interchange File (EXPORT, .e00)
Region 09 Souris-Red-Rainy
GNU zip
571
50.856
http://water.usgs.gov/GIS/dsdl/huc09_250k.e00.gz
Spatial Data Transfer Standard
Region 09 Souris-Red-Rainy (tar archive of SDTS/TVP files)
GNU zip
571
50.856
http://water.usgs.gov/GIS/dsdl/huc09_250k.sdts.tgz
ArcInfo Interchange File (EXPORT, .e00)
Region 10 Missouri
GNU zip
2520
50.856
http://water.usgs.gov/GIS/dsdl/huc10_250k.e00.gz
Spatial Data Transfer Standard
Region 10 Missouri (tar archive of SDTS/TVP files)
GNU zip
2520
50.856
http://water.usgs.gov/GIS/dsdl/huc10_250k.sdts.tgz
ArcInfo Interchange File (EXPORT, .e00)
Region 11 Arkansas-White-Red
GNU zip
1180
50.856
http://water.usgs.gov/GIS/dsdl/huc11_250k.e00.gz
Spatial Data Transfer Standard
Region 11 Arkansas-White-Red (tar archive of SDTS/TVP files)
GNU zip
1180
50.856
http://water.usgs.gov/GIS/dsdl/huc11_250k.sdts.tgz
ArcInfo Interchange File (EXPORT, .e00)
Region 12 Texas-Gulf
GNU zip
861
50.856
http://water.usgs.gov/GIS/dsdl/huc12_250k.e00.gz
Spatial Data Transfer Standard
Region 12 Texas-Gulf (tar archive of SDTS/TVP files)
GNU zip
861
50.856
http://water.usgs.gov/GIS/dsdl/huc12_250k.sdts.tgz
ArcInfo Interchange File (EXPORT, .e00)
Region 13 Rio Grande
GNU zip
660
50.856
http://water.usgs.gov/GIS/dsdl/huc13_250k.e00.gz
Spatial Data Transfer Standard
Region 13 Rio Grande (tar archive of SDTS/TVP files)
GNU zip
660
50.856
http://water.usgs.gov/GIS/dsdl/huc13_250k.sdts.tgz
ArcInfo Interchange File (EXPORT, .e00)
Region 14 Upper Colorado
GNU zip
555
50.856
http://water.usgs.gov/GIS/dsdl/huc14_250k.e00.gz
Spatial Data Transfer Standard
Region 14 Upper Colorado (tar archive of SDTS/TVP files)
GNU zip
555
50.856
http://water.usgs.gov/GIS/dsdl/huc14_250k.sdts.tgz
ArcInfo Interchange File (EXPORT, .e00)
Region 15 Lower Colorado
GNU zip
639
50.856
http://water.usgs.gov/GIS/dsdl/huc15_250k.e00.gz
Spatial Data Transfer Standard
Region 15 Lower Colorado (tar archive of SDTS/TVP files)
GNU zip
639
50.856
http://water.usgs.gov/GIS/dsdl/huc15_250k.sdts.tgz
ArcInfo Interchange File (EXPORT, .e00)
Region 16 Great Basin
GNU zip
701
50.856
http://water.usgs.gov/GIS/dsdl/huc16_250k.e00.gz
Spatial Data Transfer Standard
Region 16 Great Basin (tar archive of SDTS/TVP files)
GNU zip
701
50.856
http://water.usgs.gov/GIS/dsdl/huc16_250k.sdts.tgz
ArcInfo Interchange File (EXPORT, .e00)
Region 17 Pacific Northwest
GNU zip
1810
50.856
http://water.usgs.gov/GIS/dsdl/huc17_250k.e00.gz
Spatial Data Transfer Standard
Region 17 Pacific Northwest (tar archive of SDTS/TVP files)
GNU zip
1810
50.856
http://water.usgs.gov/GIS/dsdl/huc17_250k.sdts.tgz
ArcInfo Interchange File (EXPORT, .e00)
Region 18 California
GNU zip
949
50.856
http://water.usgs.gov/GIS/dsdl/huc18_250k.e00.gz
Spatial Data Transfer Standard
Region 18 California (tar archive of SDTS/TVP files)
GNU zip
949
50.856
http://water.usgs.gov/GIS/dsdl/huc18_250k.sdts.tgz
None. This dataset is provided by USGS as a public service.
Downloadable Data
20081020
U.S. Geological Survey
REQUIRED: The person responsible for the metadata information.
Ask USGS -- Water Webserver Team
mailing
445 National Center
Reston
VA
20192
1-888-275-8747 (1-888-ASK-USGS)
http://answers.usgs.gov/cgi-bin/gsanswers?pemail=h2oteam&subject=GIS+Dataset+huc250k
FGDC Content Standards for Digital Geospatial Metadata
FGDC-STD-001-1998
en
local time
20110828
18550400
FALSE
20200115
18560300
20200115
18560300
Selection3
002
-128730.297600
4366570.523700
3009771.740400
6069110.160900
1
50.856
Projected
GCS_WGS_1984
WGS_1984_UTM_Zone_11N
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Linear Unit: Meter (1.000000)
1.0
ISO 19139 Metadata Implementation Specification
Esri ArcGIS 12.4.2.19948
Selection3
-126.694874
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54.769213
22.586489
1
-127.906135
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51.646272
22.875722
1
002
Las Vegas
classification
Supervised landsat classification of landscape habitat near Las Vegas, NV.
ISO 19115 Geographic Information - Metadata
DIS_ESRI1.0
dataset
002
withheld
Local Area Network
50.856
Shapefile
File Geodatabase Feature Class
50.856
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EPSG
2.1(3.0.1)
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