Matthew S. Forrest Susan G. Buto Rose L. Medina 2005 vector digital data Reston, VA U.S. Geological Survey http://water.usgs.gov/lookup/getspatial?wrir84-4119c_ds500nv T.H. Thompson R. Chappell 1984 map U.S. Geological Survey Water-Resources Investigations Report 84-4119-C Reston, VA U.S. Geological Survey 1:500,000-scale, 4 sheets This data set consists of 1:500,000-scale areas of dissolved solids in the Basin and Range Province of Nevada. The sources of this data set are sheets 3 and 4 of a 1984 U.S. Geological Survey Water-Resources Investigation Report (Thompson and Chapell, 1984.) Reference Cited Thompson, T.H., and Chappell, R., 1984, Maps showing distribution of dissolved solids and dominant chemical type in ground water, Basin and Range Province, Nevada: U.S. Geological Survey Water-Resources Investigations Report 84-4119-C, scale 1:500,000, 4 sheets. This data set was created as part of a U.S. Geological Survey study, done in cooperation with the Nevada Division of Environmental Protection, to evaluate the susceptibility and vulnerability of ground water to anthropogenic contamination. The intended uses of this data set include, but are not limited to, natural resource modeling, mapping, and visualization applications. "Dissolved-solids concentration of major anions and cations was calculated from analyses using the following equation: Dissolved solids = Ca + Ma+ Na+ (0.4917)(HCO_3) + SO_4,+ Cl + K + Sr, where the concentration of each component, calcium, Ca; magnesium, Mg; sodium, Na; bicarbonate, HCO_3; sulfate, SO_4; chloride, Cl; potassium, K; and strontium, Sr; is in milligrams per liter (mg/L)" (Thompson and Chapell, 1984). Underscore preceding the letter denotes subscript. Reference Cited Thompson, T.H., and Chappell, R., 1984, Maps showing distribution of dissolved solids and dominant chemical type in ground water, Basin and Range Province, Nevada: U.S. Geological Survey Water-Resources Investigations Report 84-4119-C, scale 1:500,000, 4 sheets. 1984 publication date Complete None planned -120.111551 -113.795581 42.035358 34.989873 none dissolved solids water quality QW inlandWaters none Nevada Great Basin none These data are not intended to be used as a survey product and are for reference purposes only. Although this Federal Geographic Data Committee (FGDC) compliant metadata file is intended to document the data set in nonproprietary form, as well as ArcGIS format, this metadata file may include some ArcGIS-specific terminology. Acknowledgment of the U.S. Geological Survey and the Nevada Division of Environmental Protection would be appreciated in products derived from these data. U.S. Geological Survey Public Information Assistant mailing and physical address

333 W. Nye Lane

Carson City NV 89706 USA (775) 887-7600 (775) 887-7629 GS-W-NVpublic-info@usgs.gov Compilation of this data set and the associated metadata was done in cooperation with the Nevada Division of Environmental Protection. Technical review of this data set and metadata was provided by Douglas O. Shipley and Toby L. Welborn of the U.S. Geological Survey. Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 1; ESRI ArcCatalog 9.0.0.580 All attempts were made to compare 100 percent of the digital attribute data to the original source map. Verification was done by visual and manual comparison, combined with on-screen review, of the source with hard copy plots. Frequency tests were run on the arc and polygon attributes to check that no features were unlabeled, misspelled, or inconsistent. Corrections were made until two visual and manual comparisons, combined with on-screen review, determined 100 percent of the digital attribute data matched the original source map. The logical consistency topologically is clean. Polygon and chain-node topology are present. Using ArcGIS Workstation commands and routines, all polygons were checked for closure, missing label points, multiple label points, sliver polygons, and duplicate features; all arcs were checked for node errors, overshoots, undershoots, dangles, intersections, and duplicate features. Complete at 1:500,000-scale resolution for the Basin and Range Province of Nevada. All attempts were made to compare 100 percent of the digital spatial data to the original source map. Verification was done by visual and manual comparison, combined with on-screen review, of the source with hard copy plots. Corrections were made until two comparisons determined 100 percent of the digital spatial data matched the original source map. 300 meters Errors resulting from the quality of the source map, the automation process, and the scale resolution can impact the accuracy of the data. The errors resulting from the quality of the source map are unknown. The source map was a folded paper map in good condition. The source map was allowed to flatten out before being digitized. The root mean square (RMS) errors encountered during the automation process were no greater than 0.004. The inherent error of a 1:500,000-scale map is approximately 253 meters according to the National Map Accuracy Standards of 1947. The horizontal positional accuracy was verified by visual and manual comparison as described in the Horizontal_Positional_Accuracy_Report and the Process_Steps and matches the positional accuracy of the original source map. The horizontal positional error is deductively estimated at 300 meters. T.H. Thompson R. Chappell 1984 map U.S. Geological Survey Water-Resources Investigations Report 84-4119-C Reston, VA U.S. Geological Survey 1:500,000-scale, 4 sheets 500,000 paper 1984 publication date dissolved solids (DS) map spatial and attribute information from sheets 3 and 4 of 4 1. The DS map was securely taped to a digitizing table and registered to Lambert, North American Datum of 1927 (NAD27), parameters as follows: >Projection LAMBERT >Datum NAD27 >Zunits NO >Units METERS >Spheroid CLARKE1866 >Xshift 0.0000000000 >Yshift 0.0000000000 >Parameters > 33 0 0.000 /* 1st standard parallel > 45 0 0.000 /* 2nd standard parallel >-117 0 0.000 /* central meridian > 35 0 0.000 /* latitude of projection's origin >0.00000 /* false easting (meters) >0.00000 /* false northing (meters) The DS areas were digitized directly into the coordinate system with a maximum RMS = 0.004. The attributes RMS-I, RMS-O, DATE-DIG, ARC-TYPE were added to the arc attribute table and populated. The attribute SOLIDCON was added to the polygon attribute table and populated. 2. 1:500,000-scale hard copy plots of the digital data were generated. Using a light table, these plots were visually and manually compared with the source. Corrections were made to the spatial data until two visual and manual comparisons, combined with on-screen review, determined there was no light between the plot and the source data, and the attribute data matched the source data. 200307 1. The data were projected from Lambert to UTM zone 11, NAD27. 2. The attribute SOLIDCON was renamed DS-CODE. The attribute DS-DESC was added and populated. 20030804 1. Using ArcGIS Workstation, including the command LABELERRORS and the node error, arc dangle, and intersect environment, polygons were checked for closure, missing or multiple labels, sliver polygons, and duplicates. Arcs were checked for node errors, overshoots, undershoots, dangles, intersections, and duplicates. 2. Using the ArcGIS Workstation command CENTROIDLABEL, labels were centered within the respective polygon. 3. For polygons, the attribute DS500NV-ID was calculated to be a unique sequential integer equal to DS500NV# - 1. For arcs, the attribute DS500NV-ID was calculated to be a unique sequential integer equal to DS500NV#. The attributes were checked for unlabeled, misspelled, or inconsistent feature labels. 4. Polygon topology was built using the ArcGIS Workstation command CLEAN with the fuzzy tolerance = 0.001 and dangle = 0.01. 20041027 Metadata structured and validated using metadata tools, MP and CNS, developed by Peter Schweitzer, U.S. Geological Survey. 20041027 Vector Complete chain 1480 Label point 522 GT-polygon composed of chains 522 Point 105 Universal Transverse Mercator 11 0.999600 -117.000000 0.000000 500000.000000 0.000000 coordinate pair 0.005660 0.005660 meters North American Datum of 1927 Clarke 1866 6378206.400000 294.978698 ds500nv.aat Arc attribute table ESRI FID Internal feature number. ESRI Sequential unique whole numbers that are automatically generated. Shape Feature geometry. ESRI Coordinates defining the features. FNODE# Internal node number for the beginning of an arc (from-node). ESRI Whole numbers that are automatically generated. TNODE# Internal node number for the end of an arc (to-node). ESRI Whole numbers that are automatically generated. LPOLY# Internal node number for the left polygon. ESRI Whole numbers that are automatically generated. RPOLY# Internal node number for the right polygon. ESRI Whole numbers that are automatically generated. LENGTH Length of feature in internal units. ESRI Positive real numbers that are automatically generated. DS500NV# Internal feature number. ESRI Sequential unique whole numbers that are automatically generated. DS500NV-ID User-defined feature number. ESRI Whole numbers that are automatically generated. RMS-I The root mean square error calculated during registration of the map to a digitizer, in digitizer units (inches). Multiple values due to multiple digitizing sessions and multiple source sheets. ESRI Positive real number computed during the automation process. RMS-O The root mean square error calculated during registration of the map to a digitizer, in map units (meters) ESRI Positive real number computed during the automation process. DATE-DIG The calendar date the arc was digitized User-defined Calendar date in the form yyyymmdd ARC-TYPE A numeric code describing the boundary type User-defined 1 Basin-fill boundary DS map 2 Consolidated-rock boundary DS map 3 State-line boundary DS map 4 Study-area boundary DS map SHEET The sheet from which the arc was digitized User-defined 3 Sheet 3 of 4 DS Map 4 Sheet 4 of 4 DS map ds500nv.pat Polygon attribute table ESRI FID Internal feature number. ESRI Sequential unique whole numbers that are automatically generated. Shape Feature geometry. ESRI Coordinates defining the features. AREA Area of feature in internal units squared. ESRI Positive real numbers that are automatically generated. PERIMETER Perimeter of feature in internal units. ESRI Positive real numbers that are automatically generated. DS500NV# Internal feature number. ESRI Sequential unique whole numbers that are automatically generated. DS500NV-ID User-defined feature number. ESRI Whole numbers that are automatically generated. DS-CODE A numeric code identifying the range of DS concentration User-defined 1 0-500 mg/L DS map 2 501-1,000 mg/L DS map 3 1,001-3,000 mg/L DS map 4 3,001-10,000 mg/L DS map 5 Greater than 10,000 mg/L DS map DS-DESC The range of DS concentration User-defined 0-500 mg/L 0 <= DS concentration <= 500 milligrams per liter DS map 501-1,000 mg/L 501 <= DS concentration <= 1,000 milligrams per liter DS map 1,001-3,000 mg/L 1,001 <= DS concentration <= 3,000 milligrams per liter DS map 3,001-10,000 mg/L 3,001 <= DS concentration <= 10,000 milligrams per liter DS map Greater than 10,000 mg/L DS concentration > 10,000 milligrams per liter DS map >DS500NV.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 DS500NV# 4 5 B - > 29 DS500NV-ID 4 5 B - > 33 RMS-I 4 8 F 3 > 37 RMS-O 4 8 F 3 > 41 DATE-DIG 8 8 I - > 49 ARC-TYPE 2 2 I - > 51 SHEET 1 1 I - RMS-I is the root mean square error of registration to the digitizer in input coverage units (inches). Multiple values due to multiple digitizing sessions and multiple source sheets. RMS-O is the root mean square error of registration to the digitizer in output coverage units (meters). DATE-DIG is the calendar date the arc was digitized (yyyymmdd). ARC-TYPE is a numeric code describing the boundary type: >1 = Basin-fill boundary >2 = Conolidated-rock boundary >3 = State-line boundary >4 = Study-area boundary SHEET is the sheet from which the arc was digitized: >3 = Sheet 3 of 4 >4 = Sheet 4 of 4 > >DS500NV.PAT > >COLUMN ITEM NAME WIDTH OUTPUT TYPE N.DEC ALTERNATE NAME > 1 AREA 8 18 F 5 > 9 PERIMETER 8 18 F 5 > 17 DS500NV# 4 5 B - > 21 DS500NV-ID 4 5 B - > 25 DS-CODE 5 5 I - > 30 DS-DESC 20 20 C - DS-CODE is a numeric code identifying the range of DS concentration. DS-DESC is the range of DS concentration. >Table correlating the attributes DS-CODE and DS-DESC >====================================================== >DS-CODE DS-DESC >------------------------------------------------------ >1 0-500 mg/L >2 501-1,000 mg/L >3 1,001-3,000 mg/L >4 3,001-10,000 mg/L >5 Greater than 10,000 mg/L >====================================================== provided above U.S. Geological Survey Ask USGS -- Water Webserver Team mailing address

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Reston VA 20192 USA 1-888-275-8747 (1-888-ASK-USGS) http://answers.usgs.gov/cgi-bin/gsanswers?pemail=h2oteam&subject=GIS+Dataset+wrir84-4119c_ds500nv Downloadable Data 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 these data, software, or related materials. The use of firm, trade, or brand names in this report is for identification purposes only and does not constitute endorsement by the U.S. Geological Survey. The names mentioned in this document may be trademarks or registered trademarks of their respective trademark owners. WinZipped ARCE spatial and attribute information WinZip 0.849 http://water.usgs.gov/GIS/dsdl/wrir84-4119c_ds500nv.e00.zip None. This data set is provided by USGS as a public service. 20050419 U.S. Geological Survey Ask USGS -- Water Webserver Team mailing address

445 National Center

Reston VA 20192 USA 1-888-275-8747 (1-888-ASK-USGS) http://answers.usgs.gov/cgi-bin/gsanswers?pemail=h2oteam&subject=GIS+Dataset+wrir84-4119c_ds500nv FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998