Rose L. Medina 1999 map Carson City, NV U.S. Geological Survey http://water.usgs.gov/lookup/getspatial?ha24_hum This data set contains the topographic and administrative hydrographic area boundaries for the Humboldt River Basin at 1:24,000-scale. This data set was created to display the topographic and administrative hydrographic area boundaries for the Humboldt River Basin at 1:24,000-scale. Introduction The hydrographic area (HA) boundaries for the State of Nevada were delineated on 1:250,000-scale maps, in cooperation with the U.S. Geological Survey (USGS), and then redrawn and published at 1:500,000-scale (Cardinalli and others, 1968). This 1:500,000-scale map is the current reference for HAs in Nevada and is used as a guide in delineating the HAs at 1:24,000-scale. This data set contains the topographic and administrative HA boundaries for the Humboldt River Basin. The Humboldt River Basin HAs were delineated and digitized from 1993 to 1998 using 1:24,000-scale USGS topographic maps. Reviews The digital data in this data base has gone through a rigorous, multi-level, quality-control process that ensures the data set is a fair representation of the source map. If errors are encountered in this data set, it will be appreciated if the user would pass this information to the Metadata_Contact. Two reviews were done. The reviewers were asked to check metadata and other documentation files for completeness and accuracy. Reviewers were asked to check the topological consistency, tolerances, projections, and geographic extent. References Cardinalli, J.L., Roach, L.M., Rush, F.E., and Vasey, B.J., comps., 1968, State of Nevada hydrographic areas: Nevada Division of Water Resources map, scale 1:500,000. Cartier, K.D., Peltz, L.A., and Smith, J.L., 1994, Development and documentation of spatial data bases for the Lake Tahoe Basin, California and Nevada: U.S. Geological Survey Water-Resources Investigations Report 93-4182, 65 p. Environmental Systems Research Institute, Inc. (ESRI), 1998, ARC/INFO Version 7.2.1 Help: Redlands, CA, [on-line documentation]. Notes It should be noted that, although the boundary lines between hydrographic areas generally coincide with true topographic basin divides, some of the lines are arbitrary divisions that have no basis in topography, but are administrative and specified by Nevada Division of Water Resources. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Although this Federal Geographic Data Committee-compliant metadata file is intended to document the data set in non-proprietary form, as well as in ARC/INFO format, this metadata file may include some ARC/INFO-specific terminology. 19981130 ground condition Complete None Planned -119.04058081 -114.69446212 41.84853902 38.72094713 none hydrographic area boundary HA 1:24,000-scale hydrologic unit code HUC inlandWaters none Humboldt River Basin north-central Nevada Great Basin none Use with similarly scaled data. Acknowledgment of the U.S. Geological Survey and the State of Nevada Division of Water Resources (NDWR) would be appreciated in any products derived from this data. Rose L. Medina U.S. Geological Survey Physical Scientist mailing and physical address

333 W. Nye Ln.

Carson City NV 89706 USA 1-888-275-8747 (775) 887-7629 rlmedina@usgs.gov Compilation of this data set and the associated metadata was done in cooperation with the State of Nevada Division of Water Resources. IRIX64, 6.4, IP27 UNIX ARC/INFO version 7.2.1 Cardinalli, J.L., Roach, L.M., Rush, F.E., and Vasey, B.J. 1968 map Carson City, NV NDWR Obtain map from NDWR. Three visual checks were done to verify that the digital attribute data is a fair representation of the original source map. See Explanation. Where present, is described with each attribute defined in the Entity_and_Attribute Section. Polygon and chain-node topology present. This data set includes all the HA boundaries for the Humboldt River Basin that are present on the Cardinalli and others 1968 map. Verification plots were generated at 1:24,000-scale and overlaid on the original map. Corrections were made until there was no light between the original line and the digitized line (Cartier and others, 1994). Three visual checks were done to verify that the digital data was a fair representation of the original source map. 12 meters The HA boundaries were created from 1:24,000-scale maps. The error inherent from the scale is at least 12 meters on the x-y. Errors derived from the quality of the original map or encountered during the automation process also can impact the accuracy of this data. With an maximum RMS = 0.007, the maximum error is estimated at 19 meters on the x-y. Cardinalli, J.L., Roach, L.M., Rush, F.E., and Vasey, B.J. 1968 map Carson City, NV NDWR 500000 paper 1968 Publication date HA map The HA boundaries were delineated using this HA map. 1. The HA boundaries were delineated on 1:24,000-scale U.S. Geological Survey topographic maps using topographic contour lines and hydrographic features (Cartier and others, 1994). 2. The topographic HA boundaries were verified by two Hydrologists and the administrative HA boundaries were verified by the NDWR. 3. The HA boundaries were digitized directly into UTM, Zone 11 from the topographic maps with an RMS of at the most 0.007. 4. Positional and attribute accuracy were verified. 5. Polygon topology was built using the Arc/INFO(R) CLEAN command with the fuzzy tolerance = 0.001 and dangle = 0.01. 1993-1998 1. Using the Arc/INFO(R) CLIP command, the Humboldt River Basin HA boundary and its internal HA boundaries were clipped from the larger HA data set. 2. Polygon topology was built using the Arc/INFO(R) CLEAN command with the fuzzy tolerance = 0.001 and dangle = 0.01 (ESRI, 1998). 3. Positional and attribute accuracy were verified. 199812 Vector Point 41 String 923 GT-polygon composed of chains 42 Universal Transverse Mercator 11 0.9996 -117.0 0.0 500000.0 0.0 coordinate pair 0.001 0.001 Meters North American Datum of 1927 Clarke 1866 6378206.4 294.98 HA24_HUM.PAT Polygon Attribute Table ARC/INFO(R) GIS Software AREA Area of poly/region in square coverage units Computed Positive real numbers n/a n/a PERIMETER Perimeter of polygon/region in coverage units Computed Positive real numbers n/a n/a HA24_HUM# Internal feature number Computed Sequential unique positive integer n/a n/a HA24_HUM-ID User-assigned feature number User-defined Integer n/a n/a HUC-CODE 14 digit Hydrologic Unit Code U.S. Geological Survey Character See Overview_Description. n/a HYD-AREA Hydrographic Area number HA map Characters See Overview_Description. n/a ADMIN-HYD-AREA Hydrographic area with respect to NDWR administrative boundaries. HA map Characters See Overview_Description. n/a STATION-ID Not populated n/a n/a n/a n/a BASIN-OTHER Not populated n/a n/a n/a n/a HYD-AREA-C Hydrographic Area name HA map Characters See Overview_Description. n/a STATION-NAME Not populated n/a n/a n/a n/a BASIN-OTHER-C Not populated n/a n/a n/a n/a BASIN-MAJ-NAME Major basin name HA map Characters See Overview_Description. HA map ADMIN-BMAJ-NAME Major basin name with respect to NDWR administrative boundaries. HA map Characters See Overview_Description. n/a AREA-MI Area in square miles calculated using ARC/INFO ADDAREA.AML Positive real numbers n/a n/a VERIF Status of verification process User-defined Y Positional and attribute accuracy has been verified. n/a COMMENT Document noteworthy items. User-defined Characters n/a n/a AREA-AC Area in acres calculated using ARC/INFO ADDAREA.aml Positive real numbers n/a n/a REGION-CODE First two digits of HUC-CODE U.S. Geological Survey 16 Great Basin n/a SUBREGION-CODE 3rd and 4th digits of HUC-CODE U.S. Geological Survey Characters See Entity_and_Attribute_Overview n/a ACCOUNT-CODE 5th and 6th digits of HUC-CODE U.S. Geological Survey Characters See Overview_Description. n/a CATALOG-CODE 7th and 8th digits of HUC-CODE U.S. Geological Survey Characters See Overview_Description. n/a HA24_HUM.AAT Arc Attribute Table ARC/INFO(R) GIS Software FNODE# Internal number of from-node Computed Sequential unique positive integer n/a n/a TNODE# Internal number of to-node Computed Sequential unique positive integer n/a n/a LPOLY# Internal number of polygon to left of arc Computed Sequential unique positive integer n/a n/a RPOLY# Internal number of polygon to right of arc Computed Sequential unique positive integer n/a n/a LENGTH Length of arc in coverage units Computed Positive real numbers n/a n/a HA24_HUM# Internal feature number Computed Sequential unique positive integer n/a n/a HA24_HUM-ID User-assigned feature number User-defined Integer n/a n/a COMMENT-DIG Digitizer comments about the line. User-defined Alphanumeric characters n/a n/a DIGER Login ID of digitizer User-defined Nevada District login IDs. Nevada District Computer Services Unit RMS Root mean square error for digitized line generated Positive real numbers n/a n/a VERIF Status of verification process User-defined Y Positional and attribute accuracy has been verified. n/a DATE-DIG Date line was digitized User-defined 19930614 19980000 BASIN-MAJ Major basin name HA map Characters n/a n/a YYYY Year field redefined from DATE-DIG User-defined 1993 1998 MM month field redefined from DATE-DIG User-defined 0 7 DD day field redefined from DATE-DIG User-defined 0 27 >HA24-HUM.PAT >COLUMN ITEM NAME WIDTH OUTPUT TYPE N.DEC ALTERNATE NAME > 1 AREA 8 18 F 5 > 9 PERIMETER 8 18 F 5 > 17 HA24_HUM# 4 5 B - > 21 HA24_HUM-ID 4 5 B - > 25 HUC-CODE 14 14 C - HUC > 39 HYD-AREA 4 4 C - > 43 ADMIN-HYD-AREA 4 4 C - > 47 STATION-ID 15 15 C - SID > 62 BASIN-OTHER 8 8 C - > 70 HYD-AREA-C 60 60 C - > 130 ADMIN-HYD-AREA-C 60 60 C - > 190 STATION-NAME 50 50 C - SNAME > 240 BASIN-OTHER-C 60 60 C - > 300 BASIN-MAJ-NAME 60 60 C - BMAJ > 360 ADMIN-BMAJ-NAME 60 60 C - > 420 AREA-MI 4 9 F 2 > 424 VERIF 1 1 C - V > 425 COMMENT 60 60 C - C > 485 AREA-AC 4 12 F 2 > **REDEFINED ITEMS ** > 25 REGION-CODE 2 2 C - REG > 27 SUBREG-CODE 2 2 C - SUBREG > 29 ACCOUNT-CODE 2 2 C - ACCT > 31 CATALOG-CODE 2 2 C - CAT HUC-CODE See values for REGION-CODE, SUBREG-CODE, ACCOUNT-CODE, and CATALOG-CODE for details. Values for: >HYD-AREA HYD-AREA-C >42 Marys River Area >43 Starr Valley Area >44 North Fork Area >45 Lamoille Valley >46 South Fork Area >47 Huntington Valley >48 Dixie Creek-Tenmile Creek Area >49 Elko Segment >50 Susie Creek Area >51 Maggie Creek Area >52 Marys Creek Area >53 Pine Valley >54 Crescent Valley >55 Carico Lake Valley >56 Upper Reese River Valley >57 Antelope Valley >58 Middle Reese River Valley >59 Lower Reese River Valley >60 Whirlwind Valley >61 Boulder Flat >62 Rock Creek Valley >63 Willow Creek Valley >64 Clovers Area >65 Pumpernickel Valley >66 Kelley Creek Area >67 Little Humboldt Valley >68 Hardscrabble Area >69 Paradise Valley >70 Winnemucca Segment >71 Grass Valley >72 Imlay Area >73 Lovelock Valley >73A Lovelock Valley Oreana Subarea >74 White Plains >189A Thousand Springs Valley Herrell Siding-Brush Creek Area Values for: >ADMIN-HYD-AREA ADMIN-HYD-AREA-C >42 Marys River Area >57 Antelope Valley >58 Middle Reese River Valley >65 Pumpernickel Valley >101 Carson Desert >131 Buffalo Valley Values for BASIN-MAJ-NAME: Humboldt River Basin Great Salt Lake Basin Values for ADMIN-BMAJ-NAME: Central Region Humboldt River Basin Carson River Basin Values for SUBREG-CODE: 04 is Humboldt River Basin 05 is Carson River Basin 06 is Central Region Values for ACCOUNT-CODE: 00 is Escalante Desert-Sevier Lake: Nevada, Utah. 01 is Humboldt: The Humboldt River Basin, Nevada. 02 is Black Rock Desert: The Black Rock Desert and other closed basins that discharge into Northwestern Nevada, California, Nevada, Oregon. Values for CATALOG-CODE: for ACCOUNTING CODE = 00: 01 is Upper Sevier. Utah. for ACCOUNTING CODE = 01: 01 is Upper Humboldt, Nevada. 02 is North Fork Humboldt, Nevada. 03 is South Fork Humboldt, Nevada. 04 is Pine, Nevada. 05 is Middle Humboldt, Nevada. 06 is Rock, Nevada. 07 is Reese, Nevada. 08 is Lower Humboldt, Nevada. 09 is Little Humboldt, Nevada. for ACCOUNTING CODE = 02: 03 is Smoke Creek Desert, California, Nevada. >HA24_HUM.AAT: > >COLUMN ITEM NAME WIDTH OUTPUT TYPE N.DEC ALTERNATE NAME > 1 FNODE# 4 5 B - > 5 TNODE# 4 5 B - > 9 LPOLY# 4 5 B - > 13 RPOLY# 4 5 B - > 17 LENGTH 8 18 F 5 > 25 HA24_HUM# 4 5 B - > 29 HA24_HUM-ID 4 5 B - > 33 COMMENT-DIG 60 60 C - C > 93 DIGER 15 15 C - DI > 108 RMS 4 4 F 3 ROOT-MEAN-SQ > 112 VERIF 1 1 C - V > 113 DATE-DIG 8 8 I - YYYYMMDD > 121 BASIN-MAJ 60 60 C - BMAJ > ** REDEFINED ITEMS ** > 113 YYYY 4 4 I - > 117 MM 2 2 I - > 119 DD 2 2 I - Values for BASIN-MAJ: Humboldt Snake Great Salt Lake Humboldt Blackrock Humboldt Central Humboldt Humboldt West Central Carson Humboldt none 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+ha24_hum 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. Export Full coverage zipped 1 http://water.usgs.gov/GIS/dsdl/ha24_hum.e00.gz SDTS Full coverage zipped 1 http://water.usgs.gov/GIS/dsdl/ha24_hum.tgz None. This dataset is provided by USGS as a public service. 20041108 U.S. Geological Survey Ask USGS -- Water Webserver Team mailing

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Reston VA 20192 1-888-275-8747 (1-888-ASK-USGS) http://answers.usgs.gov/cgi-bin/gsanswers?pemail=h2oteam&subject=GIS+Dataset+ha24_hum FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998