J.L. Smith 2001 Version 1.0 remote-sensing image Carson City, Nev. U.S. Geological Survey http://water.usgs.gov/lookup/getspatial?cir92 Laczniak, Smith, Elliott, DeMeo, Chatigny, and Roemer 2001 Water-Resources Investigations Report 01-4195 Carson City, Nev. U.S. Geological Survey http://pubs.water.usgs.gov/wri0114195 The raster-based, color-infrared composite was derived from Landsat Thematic Mapper imagery data acquired during June 1992 for the Death Valley regional flow system. The image is a single-channel, parallelepiped classification that when displayed using a 256-color color table shows a simulation of a color-infrared composite. The data set was used in determining phreatophyte boundaries for a ground-water evapotranspiration study. This data set was created to determine phreatophyte boundaries for use in the report, "Ground-water discharge determined from estimates of evapotranspiration, Death Valley regional flow system, Nevada and California". The raster-based, color-infrared composite (CIR) was derived from Landsat Thematic Mapper (TM) imagery data acquired during June 1992 for the Death Valley ground-water flow system, Nevada and California. The image is a single-channel, parallelepiped classification that when displayed using a 256-color color table shows a simulation of a color-infrared composite (Beverley and Penton, 1989). TM channels 2, 3, and 4 are used in the classification process. The wavelengths of these channels correspond to those used for a CIR composite. The data range of each channel is divided into eight divisions. The 512 possible combinations are then reduced to 256. A color table of red, green, and blue values is created for display of the image. Sixteen possible color values exist for each color. These values are scaled between 0 and 255. The image is reduced from more than 16 million colors to 256 colors. Reviews The CIR image for 1992 was checked for consistency and accuracy during the data processing. Two external reviews were done. The reviewers were asked to check metadata and other documentation files for completeness and accuracy. Reviewers also were asked to check the topological consistency, tolerances, projections, and geographic extent. The Landsat Entity-identification numbers are LT5040034009216510 and LT5040035009216510. References Beverley, A.M., and Penton, P.G., eds., 1989, ELAS, Science and Technology Laboratory Applications Software--Vol. II, User Reference: National Aeronautics and Space Administration, Science and Technology Laboratory Report 183, [unpaginated]. U.S. Geological Survey, 1992, Landsat Thematic Mapper imagery: Sioux Falls, S.D., U.S. Geological Survey. Notes 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 data set has been used by the U.S. Geological Survey, 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. Although this Federal Geographic Data Committee-compliant metadata file is intended to document the data set in non-proprietary form, as well as in ArcInfo format, this metadata file may include some ArcInfo-specific terminology. Users should exercise caution and judgment in applying these data, and be aware that errors may be present in any or all of the digital image data. If errors are encountered in this data set, it will be appreciated if the user would pass this information to the Metadata_Contact. 19920613 The classification is only appropriate for the date of the imagery. Complete None planned -117.55038309 -115.25101413 37.65355519 35.3783235 None CIR color-infrared inlandWaters None Nevada southern Nevada eastern California Ash Meadows California Valley Chicago Valley China Ranch Death Valley Franklin Lake Franklin Well area Oasis Valley Resting Spring Sarcobatus Flat Shoshone Stewart Valley Tecopa None The data are derived from copyrighted data provided by EOSAT Corporation. No use constraints apply. Users should exercise caution when using these data. Use with similarly scaled data. Acknowledgment of the U.S. Geological Survey and the U.S. Department of Energy would be appreciated in any products derived from these data. J. L. Smith U.S. Geological Survey Hydrologist mailing and physical address

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Carson City NV 89706 USA 1-888-275-8747 (775) 887-7629 jlsmith@usgs.gov Compilation of this data set and the associated metadata was done in cooperation with the U.S. Department of Energy, Nevada Operations Office. IRIX64, 6.4, IP27 UNIX ArcInfo version 7.2.1 See Entity_Attribute_Information See explanation Where present, an explanation is used to describe each attribute defined in the Entity_and_Attribute section. Not applicable for raster data. Complete For geometric corrections, 72 control points evenly distributed throughout the image generally are collected. First order global polynomial models were used. During geocorrection model evaluation, some control points are dropped but others in the immediate area are collected as replacements. Maps at a scale of 1:24,000 were used for initial control point collection. These procedures produced acceptable models for TM data geocorrection. In some areas, more than a one- or two-pixel error has been observed as compared with Digital Line Graph (DLG) data. Distortions in the mountainous areas probably were greater than one pixel due to relief. 25.0 meters Overall root-mean-square (RMS) errors of geocorrection models used were less than one pixel and generally ranged from 15 to 25 meters in the x and y directions. Some individual control point may have RMS errors approaching 40 meters. U.S. Geological Survey (USGS) 19920613 remote-sensing image Sioux Falls, SD 57198 USGS CD-ROM 19920613 ground condition Landsat TM The Landsat TM was processed using the National Landsat Archive Production System (NLAPS) systematic correction. The TM data are converted to NASA ELAS format (Science and Technology Laboratory Application Software; Beverley and Penton, 1989). Data quality is assessed, statistics are collected, classification is produced, and geometric corrections are performed using ELAS. Preprocessing of the TM data included mosaicking the two scenes together. Since the scenes were the same date, a common point was found in the overlap area and the scenes were copied together into an output file. TM channels 2, 3, and 4 were used as input to the ELAS module CLPIPE (Beverley and Penton, 1989) producing a single channel with a color table. Geometric corrections were performed using first-order global polynomial models with nearest neighbor resampling. The single channel image was then converted to ArcInfo GRID (R) format. A color table was created from the ELAS system to an ArcInfo(R) format color table. Landsat TM 1997 Raster grid cell 13955 11270 Universal Transverse Mercator 11 coordinate pair 18.0 18.0 Meters North American Datum of 1927 Clarke 1866 6378206.4 294.98 grid cell grid cell used for class value ArcInfo(R) GIS software VALUE Classification value Beverley, A.M., and Penton, P.G., eds., 1989, ELAS, Science and Technology Laboratory Applications Software--Vol. II, User Reference: National Aeronautics and Space Administration, Science and Technology Laboratory Report 183, [unpaginated]. 0 255 The classification code in VALUE is an arbitrary, categorical number created by the ELAS CLPIPE module. The VAT file of the ArcInfo grid also contains the attribute COUNT which is the number of pixels having an assigned VALUE. The ArcInfo grid also includes a statistic file (CIR92.STA) which contains the attributes MIN, MAX, MEAN, and STDV, where MIN is the minimum of VALUE, MAX is the maximum of VALUE, MEAN is the mean of VALUE, and STDV is the standard deviation of VALUE. These attributes have limited relevance in that they summarize the statistics of categorical data, and therefore, are not included in any non-proprietary digital data sets. CIR92.VAT: COLUMN ITEM NAME WIDTH OUTPUT TYPE N.DEC ALTERNATE NAME 1 VALUE 4 10 B - 5 COUNT 4 10 B - CIR92.STA: COLUMN ITEM NAME WIDTH OUTPUT TYPE N.DEC ALTERNATE NAME 1 MIN 8 15 F 3 9 MAX 8 15 F 3 17 MEAN 8 15 F 3 25 STDV 8 15 F 3 none 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://water.usgs.gov/user_feedback_form.html 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/cir92_data.tgz Export Full coverage zipped 1 http://water.usgs.gov/GIS/dsdl/cir92_meta.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+cir92 FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998