U.S. Geological Survey EROS Data Center 1996 1.0 remote-sensing image USGS Digital Raster Graphics Digital Raster Graphics (DRGs) are scanned color images of USGS topographic maps. Sioux Falls U.S. Geological Survey EROS Data Center Earth Science Information Centers (ESIC) offer nationwide information and sales service for USGS map products and earth science publications. For additional information, contact any USGS Earth Science Information Center (ESIC), or call 1-800-USA-MAPS. http://casil.ucdavis.edu/casil/gis.ca.gov/drg/ 24k_drg.txt A digital raster graphic (DRG) is a scanned image of a U.S. Geological Survey (USGS) topographic map. The scanned image includes all map collar information. The image inside the map neatline is georeferenced to the surface of the Earth. The DRG can be used to collect, review, and revise other digital data, especially digital line graphs (DLG). When the DRG is combined with other digital products, such as digital orthophoto quadrangles (DOQ) or digital elevation models (DEM), the resulting image provides additional visual information for the extract- ion and revision of base cartographic information. The USGS is producing DRG's of the 1:24,000-,1:24,000/1:25,000-, 1:63,360- (Alaska), 1:100,000-, and 1:250,000-scale topographic map series. The DRG is used for validating digital line graphs (DLG's) and for DLG data collection and revision. The DRG can help assess the completeness of digital data from other mapping agencies. It can also be used to produce "hybrid" products. These include combined DRG's and DOQ's for revising and collecting digital data, DRG's and DEM's for creating shaded-relief DRG's, and combinations of DRG, DOQ, and DLG data. Although a standard DRG is an effective mapping tool, its full potential for digital production is realized in combination with other digital data Digital raster graphic (DRG) data on CD-ROM are being produced by the U.S. Geological Survey (USGS) through an Innovative Partnership agreement with The Land Information Technology Company, Ltd., of Aurora, CO. This series includes DRG's of USGS standard series quadrangle maps of the United States, its Trusts, and Territories. en varies publication date In work As needed -119.500801 -119.373968 35.875604 35.749378 45096.30603356462.226118-251950.476886-237994.930894 None Contour line PLSS Hydrography Transportation Topographic map Digital raster graphic DRG USGS quadrangle Quad MEAR335 California1996 None Acknowledgement of the U.S. Geological Survey would be appreciated in products derived from these data. Summary: This disclaimer statement requires the data recipient to receive the data "as is" with no warranty, and to hold all data providers not liable for any losses or damages caused by use of the data. The statement also requires the data recipient to not distribute any portion of the data without a copy of this disclaimer statement. Whereas the Kern Geographic Information Network (Kern GEONET) and its members and other agencies have developed digital geographic data herein referred to as "the Data." Whereas the entity or entities acquiring a copy the Data are herein referred to as "the Recipient." Whereas the Kern Geographic Information Network and its members, Kern Council of Governments and its member agencies, and other agencies that have developed and contributed the Data which is being transmitted to the Recipient by these agencies are herein referred to as "the Data Providers." I. Disclaimer of Liability and Warranties A. The Recipient understands and agrees that it is possible that errors and omissions will occur in data input or programming done by the Data Providers to provide the data in the form desired. The Recipient further understands and agrees that it is probable that errors and omissions will occur in record keeping processes, especially when large numbers of records are developed and maintained, and that data may not meet the Recipient's standards as to accuracy or completeness. Notwithstanding, the Recipient agrees to take the data "as is", fully expecting that there may be errors and omissions associated with the data. B. The Recipient further understands and agrees that the Data Providers make absolutely no warranty whatsoever, whether expressed or implied, as to the accuracy, thoroughness, value, quality, validity, merchantability, suitability, condition or fitness for a particular purpose of the data or any programming used to obtain the data, nor as to whether the data are error-free, up-to-date, complete or based upon accurate or meaningful facts. C. The Recipient further understands and agrees that it will forever waive any and all rights, claims, causes of action or other recourse that it might otherwise have against the Data Providers for any injuries or damages of any type, whether direct, indirect, incidental, consequential or otherwise, resulting from any error or omission in the data or in any programming used to obtain the data, or in any manner arising out of or related to this agreement or the data provided hereunder. The Recipient agrees that the Data Providers shall not be liable to the Recipient for any liability, claim, loss, damage, injury or expense of any kind caused or alleged to be caused, directly or indirectly, by the inadequacy of data obtained from the Data Providers, by any deficiency of the Data Providers or the Recipient systems, by any delay or failure to provide any service, or by any other interruption, disruption or loss of the Recipient operations. II. Indemnification A. The Recipient agrees that it will provide no copy or partial copy of any data to any other party, including consultants under contract with The Recipient, without disclosing that the copy or partial copy was obtained from the Data Providers and without attaching the Disclaimer of Liability and Warranties paragraph. B. The Recipient hereby agrees to defend, save, hold harmless and indemnify the Data Providers and signatories to its data sharing agreements and its/their officers, employees and agents against claims by anyone for any loss, injury, damage, risk, cause of action, or liability of any type (including legal fees) incurred by the Recipient or any other person, relating to or arising out of the subject matter of this agreement, or which may be alleged to have been caused, either directly or indirectly, by the acts, conduct, omissions, negligence or lack of good faith of the Data Providers, their officers, agents or employees. U.S. Geological Survey EROS Data Center Customer Services Representative mailing and physical address

U.S. Geological Survey EROS Data Center

Sioux Falls SD 57198-0001 USA (605) 594-6151 (605) 594-6933 (605) 594-6589 custserv@edcmail.cr.usgs.gov 0730 - 1615 CST URL: http://edcwww.cr.usgs.gov/eros-home.html Microsoft Windows 2000 Version 5.1 (Build 2600) Service Pack 1; ESRI ArcCatalog 8.3.0.800 Text File The DRG uses a standard palette to ensure uniform color throughout a particular map series. The RGB values for a particular color, therefore, will remain consistent throughout that DRG series. Although the color values of the DRG may sometimes match those of the paper source map, a user will usually notice small differences between the colors on the digital image and on the paper map. Also, the quality of the user's monitor affects the DRG color displayed. Although the DRG generally contains the complete content of the source map, features may occasionally be blurred because of substandard source materials. The DRG also may contain misclassified pixels (color noise). The DRG is an 8-bit color image that employs a color palette to ensure uniform colors throughout a particular DRG series. All DRG's within a series must have the same RGB value. 00 DRG's are examined to ensure color consistency within a series. Inspections are performed on selected DRG's to ensure that both the order of digital numbers (see table 2-2) and digital number values are correct. Colors will be checked for color compliance to map series and for major color differences between features on the DRG and similar features on the source map. Color consistency throughout each series is checked by comparing a DRG to its neighboring quadrangles whenever possible. The USGS DRG is produced with the intention of replicating as close as possible the original source map. Users of the DRG will note, however, that a certain amount of "noise" can be discerned when small areas are blown up or viewed under zoomed-in conditions. This noise is in the form of random specks or pixels of color and halos due to any number of factors, such as, the quality of the source, the use of screens and patterns on the litho, and the unevenness of ink due to saturation and absorption. Discontinuities or breaks in linear features may also be present and are due to improper calibration or usage of the scanner, the condition of the source, and resampling. Descreening, quantizing, and noise filtering are methods used to reduce noise, which, besides creating a more aesthetically pleasing image, have the added benefit of reducing the size of the image file. Removal of lithographic screen patterns is preferred but not required. Image completeness is checked by visually inspecting a sampling of DRG's. Each selected DRG will be examined for gaps (missing data) in the main body of the map, the map collar, the overedge areas, and any insets A random sampling of DRG's will be accuracy tested. The accuracy test will be performed by comparing the positions of UTM grid intersections on the source graphic against the corresponding location on the digital image. A visual inspection will determine whether those coordinates fall within the pixels that define a grid tick. DRG's duplicate the horizontal accuracy of its source. 0 DRG's will retain the horizontal accuracy of the source maps. Most USGS printed maps contain the National Map Accuracy Standards (NMAS) note in the collar area. The NMAS states that for maps on publication scales of 1:20,000 or smaller, not more than 10 percent of the points tested shall be in error by more than 1/50 inch measured on the publication scale. Test points must be "well-defined", that is, easily visible or recoverable on the ground. For DRG's this accuracy statement applies only to that area of the DRG that falls within the neatline of the source map (excluding inset areas). Overedge areas falling outside the transformation boundary area (the map neatline), can exhibit anomalies or discrepancies. These anomalies also will appear in the map inset areas and in the map collar. For maps without the NMAS note, the horizontal accuracy is unknown. However, the DRG will retain the accuracy of the source map. In the DRG the vertical positional accuracy is referenced in the DRG collar. U.S. Geological Survey varies map The source for DRG's are the standard quadrangle format USGS topographic maps as described in the Federal Geographic Data Committee "Manual of Federal Geographic Data Products." They include 1:20,000-, 1:24,000-, 1:25,000-, 1:30,000-, 1:63,360-, 1:100,000- and 1:250,000-scale topographic maps. Included in the 1:24,000- and 1:25,000-scale series are provisional (P) maps and color orthophotomaps. paper unknown publication date USGS Topo The standard area of coverage of a DRG is the entire area printed on a USGS standard series topographic map including the map collar, any overedge areas, and insets. These standard series maps include: 7.5-minute map series: Conterminous United States, Hawaii, and limited areas of Alaska at 1:24,000 and 1:25,000 scale. 7.5- by 15-minute map series: Covers limited areas of the conterminous United States at 1:25,000 scale. 30- by 60-minute map series: Conterminous United States 24000 Production of a DRG begins with the scanning of a paper 7.5-minute topographic map (map1) on a high-resolution scanner. Scanning resolutions range from 500-1,000 dpi with an output file of 160-300 Mb in size. Removal of screens (descreening) and color quantization to reduce the number of colors also takes place during the scanning phase. The raw scan file is then transformed and georeferenced using UTM coordinates of the sixteen 2.5-minute grid ticks, which are obtained using the in-house produced program COORDAT and stored in a ground control file. Those sixteen 2.5-minute ticks are interactively visited and assigned their respective UTM coordinates. The USGS program XSHAPES4 then performs a piecewise linear rubber sheet transformation. An output resolution of 2.4 meters (8.2 feet) is chosen to resample the file to 250 dpi. The image file is converted to a TIFF 6.0 image and further reduced by converting the file to a run length encoded PackBits compression (type 32773). The color palette of the compressed DRG is then standardized by replacing the original RGB values assigned during the scanning process with standard RGB value combinations using the in-house produced TIFFREMAP program. map1 0000 Rolla-ESIC U.S. Geological Survey Customer Services Representative mailing and physical address

1400 Independence Rd., MS231

Rolla MO 65401-2602 USA 573-308-3577 573-308-3652 esic@mcmcmail.er.usgs.gov URL: http://mcmcweb.er.usgs.gov/drg/ Raster Pixel 9128 7435 1 1.5287051.5288728Upper LeftFALSEWavelet3pixel codesTRUEECW (Enhanced Compressed Wavelet) row and column 1.528705 1.528872 meters Albers Conical Equal Area34.00000040.500000-120.0000000.0000000.000000-4000000.000000 North American Datum of 1927 Clarke 1866 6378206.400000 294.978698 GCS_North_American_1927Albers Conical Equal Area Each raster entity or pixel contains a digital number from 0 through 12 referencing a color palette of RGB values from 0 through 255 in which the standard colors used in the DRG are defined. Standards for Digital Raster Graphic. U.S. Geological Survey EROS Data Center Customer Services Customer Services Representative mailing and physical address

Customer Services U.S. Geological Survey EROS Data Center

Sioux Falls SD 57198 USA 605-594-6151 605-594-6933 605-594-6589 custserv@edcmail.cr.usgs.gov 7:30 am to 4:00 pm CT Automated Ordering. Your order is forwarded to Customer Services at the U.S. Geological Survey's EROS Data Center. A Customer Services Representative contacts you to discuss your order and your mode of payment. Manual Ordering. Write down the ordering ID(s) for your item(s). Contact Customer Services between the hours of 8:00 a.m. and 4:00 p.m. CST. DRG CD-R Although these data have been processed successfully on a computer system at the USGS, no warranty expressed or implied is made by the USGS regarding the use of the data on any other system, nor does the act of distribution constitute any such warranty. The USGS will warrant the delivery of this product in computer-readable format and will offer appropriate adjustment of credit when the product is determined unreadable by correctly adjusted computer input peripherals, or when the physical medium is delivered in damaged condition. Requests for adjustment of credit must be made within 90 days from the date of this shipment from the ordering site. Tagged Image File Format (TIFF) version 6.0 Download WinCATS USGS DRG and DLG-O & DRG viewing software available from USGS. To facilitate file manipulation by the widest possible range of potential users, data and text files on the CD-ROM conform to the DOS "eight plus three" (8.3) file naming convention. The associated DRG image (.TIF), world (.TFW), and metadata (.FGD) files incorporate an intelligent data set name (DSN) consisting of descriptive metadata wrapped around a standardized kernel that describes the spatial location of the file. The intent of this file naming protocol is to positively identify the spatial identity of the file and describe its categoric identity. The DSN is designed to geographically locate DRG's of quadrangles using the 7.5-minute grid, clearly identifying those that fall exactly on the grid. DRG's that are not aligned with the 7.5-minute grid can be named with this convention but additional consideration is required to relate these undersize, oversize, or offset quadrangles to their most logical and unique 7.5-minute grid location. PackBits 4.963 4.963 CD-ROM 650 megabytes ISO 9660 None The current costs are available at: URL: http://edcwww.cr.usgs.gov/glis/hyper/order_info/prices#DRG_CD DRG File size may necessitate distribution on multiple CD-ROMs Dataset searching and ordering capabilities are available through the Global Land Information System (GLIS) at: URL: http://edcwww.cr.usgs.gov/webglis ASAP Adobe Acrobat Reader 2., CD-ROM drive 1997 20040917 19970904 19971230 U.S. Geological Survey EROS Data Center Customer Services Representative mailing and physical address

Customer Services U.S. Geological Survey EROS Data Center

Sioux Falls SD 57198-0001 USA (605) 594-6151 (605) 594-6933 (605) 594-658 custserv@edcmail.cr.usgs.gov 0700 - 1615 CST FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998 local time enhttp://www.esri.com/metadata/esriprof80.htmlESRI Metadata Profile 2003091510134900FALSE20040121125358002004091714264800{C2BE83FC-73B6-4871-BBFA-8FC5D3BD2836}Microsoft Windows 2000 Version 5.1 (Build 2600) Service Pack 1; ESRI ArcCatalog 8.3.0.80024k_drg.txt-119.500801-119.37396835.87560435.749378145096.30603356462.226118-237994.930894-251950.4768861ISO 19115 Geographic Information - MetadataDIS_ESRI1.0dataset002file://\\KERNCOG02\SYS\RASTER\DRG\24K\allensworth.ecwLocal Area Network4.963Text FileAlbers Conical Equal Area274351.52870591281.528872120040917