Identification_Information: Citation: Citation_Information: Originator: U.S. Geological Survey Originator: California Department of Fish and Game Title: 250K Digital Raster Graphic (DRG) Mosaics Geospatial_Data_Presentation_Form: raster digital data Online_Linkage: \\Molib01\GIS_Library\Maps\DRG_250K_Mosaics Description: Abstract: Mosaicked California Vicinity 1 Degree by 2 Degree 1:250,000 Digital Raster Graphic (DRG) USGS Quad Images. Purpose: Display seamless topographic map images. Supplemental_Information: -- BEGIN ORIGINAL DRG METADATA - THIS INFORMATION MAY NOT BE CURRENT -- CALIFORNIA DEPARTMENT OF FISH AND GAME (DFG) GIS METADATA California Vicinity 1 Degree by 2 Degree 1:250,000 Digital Raster Graphic (DRG) USGS Quad Images (Standard and Trimmed Versions) and Associated Quad Index Coverage DATA TYPES: images and associated coverage index METADATA DATE: 1999.05.21 RELATED DATA .tif = DRG image .tfw = DRG image world file .fgd = USGS-provided metadata for each DRG image drg250 = DFG-provided coverage-format DRG and quad index drg250.tif = DFG-provided statewide DRG image mosaic drg250.tfw = DRG image mosaic world file drg250r.tif = DFG-provided region DRG image mosaic drg250r.tfw = DRG image mosaic world file drg250.sid = DFG-provided statewide MrSID DRG image mosaic drg250.sdw = MrSID image world file drg250r.sid = DFG-provided region MrSID DRG image mosaic drg250r.sdw = MrSID image world file drg250.txt, drg50r.txt = DFG-provided metadata for DRG images and index IMAGERY DESCRIPTION Digital Raster Graphics are PackBit-compressed tiff images of USGS paper quadrangle maps. Two versions are available, standard (untrimmed) and trimmed. Trimmed versions have been clipped to the map neat line, or in the case of irregular DRGs, to their outer map extent, removing the collar that contains legends and descriptive text. This enables side by side display without areas being overlapped by adjacent map collars. IMAGE ACQUISITION NOTES Some of these DRG images were acquired indirectly from the United States Geological Survey (USGS) through the North Coast Geographic Information Cooperative (NCGIC). The remaining DRG images were acquired directly from the USGS EROS Data Center via FTP order. These images represent the topographic 1:250,000 series - the entire state of California is available with the exception of the Santa Rosa Island quad. This data is provided "as-is" - the California Department of Fish and Game makes no warranty as to the suitability of this data for any purpose. IMAGE PROCESSING NOTES Source images were in UTM projection, zone 10 or 11. All images were converted to ARC/INFO grids, reprojected to Albers conic equal-area (standard Teale parameters) while retaining source data resolution, and converted back to TIFF image format using PackBits compression. Some grid reclassification was performed to transform reprojected NODATA areas to white pixels in the output images. Two sets of statewide images are available, standard or trimmed. The standard DRG images include map collar information as displayed on a regular USGS paper map. Trimmed DRG images have been clipped to the neatline of the quad, allowing for easier image mosaicking and edgematching. Clipping was performed using an automated routine in ARC/INFO. INDEX COVERAGE DESCRIPTION The 'drg250' coverage is a map index and database of California vicinity USGS 1 degree by 2 degree 1:250,000-scale paper quadrangle maps and Digital Raster Graphic (DRG) images. The majority of the index boundaries were automatically generated with the ARC/INFO 'GENERATE' command. Some boundaries were edited to better correspond to specific quad maps with non-standard sizes. The intended uses of the index include: updating quad and DRG information, generating custom indexes and product purchase lists, and similar applications. IMAGE VITAL STATISTICS Datum: NAD 27 Projection: Albers Units: Meters 1st Std. Parallel: 34 00 00 (34.0 degrees N) 2nd Std. Parallel: 40 30 00 (40.5 degrees N) Longitude of Origin: -120 00 00 (120.0 degrees W) Latitude of Origin: 00 00 00 (0.0 degrees) False Easting (x shift): 0 False Northing (Y shift): -4000000 Source: USGS - EROS Data Center (Some images provided by the North Coast Geographic Information Cooperative (NCGIC)) Data Scale: 1:250,000 Data Resolution: 25.4 Meters Conversion Software: ARC/INFO 7.1.1 Processing platform: HP Unix workstation INDEX COVERAGE VITAL STATISTICS Datum: NAD 27 Projection: Albers Units: Meters 1st Std. Parallel: 34 00 00 2nd Std. Parallel: 40 30 00 Longitude of Origin: -120 00 00 Latitude of Origin: 00 00 00 False Easting (X shift): 0 False Northing (Y shift): -4,000,000 Sources: ARC/INFO GENERATE; USGS quad names from Geographic Names Information System (GNIS) Source Projection: Geographic (latitude/longitude) Source Units: Decimal Degrees Source Scale: n/a Capture Method: n/a Conversion Software: ARC/INFO rev. 7.1.1; ArcView 3.1 Data Structure: Vector ARC/INFO Coverage Type: Polygon ARC/INFO Precision: Single ARC/INFO Tolerances: Fuzzy = 134.211 V; Dangle = 0.000 V Number of Features: 42 Layer Size: .114 MB (ARC/INFO uncompressed export) Data Updated: May 1999 INDEX COVERAGE DATA DICTIONARY Structure of table drg250.pat ITEM NAME WIDTH OUTPUT TYPE N.DEC DESCRIPTION AREA 4 12 F 5 Area of polygon, square meters PERIMETER 4 12 F 5 Polygon perimeter, meters DRG250# 4 5 B - ARC/INFO internal record number DRG250-ID 4 5 B - User-assignable identifier Q250NAME 21 21 C - USGS name for 250K quad Q250YEAR 4 4 C - Latest year shown on DRG quad image Q100SCAN 8 8 C - Name for DRG (scanned quad image) TRIMMB 5 5 F 2 Trimmed DRG file size, megabytes UNTRIMMB 5 5 F 2 Standard (untrimmed) DRG file size SOUTH 10 10 F 5 Southern limit of quad (DD) NORTH 10 10 F 5 Northern limit of quad (DD) EAST 10 10 F 5 Eastern limit of quad (DD) WEST 10 10 F 5 Western limit of quad (DD) SE_COR_LON 9 9 C - Longitude of southeast corner (DMS) SE_COR_LAT 9 9 C - Latitude of southeast corner (DMS) STOCKNO 8 8 C - USGS 250K topo quad stock number INDEX COVERAGE DATA QUALITY ASSESSMENT The following are subjective remarks on the quality of this data. Automatically generated quad boundaries were derived from latitude and longitude values in decimal degrees and projected with ARC/INFO into the Albers Conic Equal-Area coordinates. Precision limits are those of the software. Attribute completeness is good for all quads. Discrepencies may exist among coverage entries and published USGS map catalogs and hardcopy indexes. ACCESS LIMITATIONS None. Any datasets described above in the RELATED DATA section are in the public domain and may be freely redistributed. DATA CONTACTS USGS Quadrangle Maps: Department of Interior U.S. Geological Survey National Mapping Division http://mapping.usgs.gov 1-800-275-8747 Specific URL for Digital Raster Graphics: http://mcmcweb.er.usgs.gov/drg/ DFG SPATIAL DATA DISTRIBUTION: Information Technology Branch Spatial Data Coordination Paul Veisze, pveisze@dfg.ca.gov Lora Konde, lkonde@dfg.ca.gov Will Patterson, wpatters@dfg.ca.gov METADATA CONTACT Will Patterson, DFG GIS Analyst (916) 323-1484; Email: wpatters@dfg.ca.gov UPDATES 1999.12.29 renamed index from quad250k to drg250 and consolidated metadata. SOURCE METADATA Attached below is a USGS-provided metadata file for an individual DRG image. This attachment has been edited by DFG to account for the entire California vicinity set. Please note that USGS-provided individual DRG image metadata files (*.fgd) DO NOT describe any data modifications performed by DFG (i.e. reprojection to Albers or trimming procedures). --- begin USGS-provided metadata modified by DFG for CA vicinity set --- Digital Raster Graphic - Metadata --Identification Information-- -Citation- 8.1 ORIGINATOR: USGS 8.2 PUBLICATION DATE: Varies by quad 8.4 TITLE: Varies by quad 8.6 GEOSPATIAL DATA PRESENTATION FORM: "map" -Publication Information- 8.8.1 PUBLICATION PLACE: Reston, VA 8.8.2 PUBLISHER: USGS -Description- 1.2.1 ABSTRACT: The Digital Raster Graphic (DRG) is a raster image of a scanned USGS topographic map including the collar information, georeferenced to the UTM grid. 1.2.2 PURPOSE: A DRG is useful as a source or background layer in a GIS, as a means to perform quality assurance on other digital products, and as a source for the collection and revision of DLG data. DRG's can also be merged with other digital data, e.g. DEM's or DOQ's, to produce a hybrid digital file. 1.2.3 SUPPLEMENTAL INFORMATION: Varies by quad -Time period of content- Single Date/Time 9.1.1 CALENDAR DATE: Varies by quad 1.3.1 CURRENTNESS REFERENCE: "Ground Condition" -Status- 1.4.1 PROGRESS: "Complete" 1.4.2 MAINTENANCE AND UPDATE FREQUENCY: "Irregular" -Spatial Domain- Bounding Coordinates 1.5.1.1 WEST BOUNDING COORDINATE: Varies by quad 1.5.1.2 EAST BOUNDING COORDINATE: Varies by quad 1.5.1.3 NORTH BOUNDING COORDINATE: Varies by quad 1.5.1.4 SOUTH BOUNDING COORDINATE: Varies by quad -Keywords- Theme 1.6.1.1 THEME KEYWORD THESAURUS: "None" 1.6.1.2 THEME KEYWORD: digital raster graphic 1.6.1.2 THEME KEYWORD: DRG 1.6.1.2 THEME KEYWORD: topographic map Place 1.6.2.1 PLACE KEYWORD THESAURUS: Department of Commerce, 1977, Countries, Dependencies, Areas of Special Sovereignty, and their Principal Administrative Divisions (Federal Information Processing Standard 10-3): Washington, Department of Commerce, National Institute of Standards and Technology. 1.6.2.2 PLACE KEYWORD: US 1.6.2.1 PLACE KEYWORD THESAURUS: Department of Commerce, 1987, Codes for the Identification of the States, The District of Columbia and the Outlying Areas Of The United States, and Associated Areas (Federal Information Processing Standard 5-2): Washington, Department of Commerce, National Institute of Standards and Technology. 1.6.2.2 PLACE KEYWORD: CA 1.6.2.2 PLACE KEYWORD: OR 1.6.2.2 PLACE KEYWORD: NV 1.6.2.2 PLACE KEYWORD: AZ 1.7 ACCESS CONSTRAINTS: "None" 1.8 USE CONSTRAINTS: Acknowledgment of the USGS would be appreciated in products derived from these data. 1.11 DATA SET CREDIT: This DRG was produced through an Innovative Partnership agreement between The Land Information Technology Company, Ltd., of Aurora, CO and the USGS. --Data Quality Information-- -Attribute Accuracy- 2.1 ATTRIBUTE ACCURACY REPORT: 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. 2.2 LOGICAL CONSISTENCY REPORT: Not Applicable 2.3 COMPLETENESS REPORT: The DRG is a faithfully reproduced digital image of the original source map. Some differences may be detected between the source graphic used and the DRG due to the RGB values assigned that particular color. The intent is to recreate those colors as near as possible. Data completeness for DRG files reflect content of the source graphic. Features may have been eliminated or generalized on the source graphic due to scale and legibility constraints. For information on collection and inclusion criteria, see U.S. Geological Survey, 1994, Standards for 1:24,000-Scale Digital Line Graphs and Quadrangle Maps: National Mapping Program Technical Instructions and U.S. Geological Survey, 1994, Standards for Digital Line Graphs: National Mapping Program Technical Instructions. -Positional Accuracy- Horizontal Positional Accuracy 2.4.1.1 HORIZONTAL POSITIONAL ACCURACY REPORT: While the datum of the published map is retained to be consistent with other USGS digital data, this image is cast on the UTM and may be INCONSISTENT with the credit note on the image collar. Vertical Positional Accuracy 2.4.2.2 VERTICAL POSITIONAL ACCURACY REPORT: Refer to the DRG collar for information about vertical positional accuracy. -Lineage- Source Information Source Citation 2.5.1.5 SOURCE CITATION ABBREVIATION: map1 8.1 ORIGINATOR: USGS 8.1 ORIGINATOR: Other ORIGINATORS - varies by quad 8.2 PUBLICATION DATE: Varies by quad 8.4 TITLE: Varies by quad 8.6 GEOSPATIAL DATA PRESENTATION FORM: "map" --Publication Information-- 8.8.1 PUBLICATION PLACE: Reston, VA 8.8.2 PUBLISHER: USGS 2.5.1.2 SOURCE SCALE DENOMINATOR: 250000 2.5.1.3 TYPE OF SOURCE MEDIA: "paper" -Source Time Period of Content- Single Date/Time 9.1.1 CALENDAR_DATE: Varies by quad 2.5.1.4.1 SOURCE CURRENTNESS REFERENCE: "ground condition" 2.5.1.6 SOURCE CONTRIBUTION: The source map is scanned to produce the DRG. -Process Step- 2.5.2.1 PROCESS DESCRIPTION: The production procedures, instrumentation, hardware, and software used in the collection of standard DRG products vary depending on systems used at the contract, cooperator or USGS production sites. The majority of DRG data sets are acquired through government contract. The process step describes, in general, the process used in the production of standard DRG data sets. 1. 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 - 1000 dpi with the output file running between 160-300 mb. 2. Removal of screens (descreening) and color quantization to reduce the number of colors also takes place during the scanning phase. 3. 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. USGS program XSHAPES4 then performs a piecewise linear rubber sheet transformation. 4. An output resolution of 2.4 meters (8.2 feet) is chosen in order to resample the file to 250 dpi. 5. The image file is converted to a TIFF and further reduced by converting the file to a run length encoding Packbits compression(type 32773). 6. 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. 7. Prior to archiving the DRG undergoes the following quality assurance procedures: a. The color index values of each DRG are checked to ensure the RGB combinations are consistent with the standardized color palette. b. All DRG files are inspected to ensure that they are geometrically consistent with normal map presentation. c. Selected DRG's are checked to ensure that data elements in the DRG metadata file correspond to the map collar information and to the information in the associated image file. d. Selected DRG's are checked for georeferencing accuracy by comparing the book value of latitude and longitude tick marks with corresponding tick intersections in the DRG image. e. Transformations are checked on selected DRG's by comparing the positions of well defined points, such as UTM grid intersections in the graphic product, with the corresponding image points in the DRG. USGS DRG production specifications are available on request from the National Mapping Division and Mid-Continent Mapping Center by contacting: Rolla-ESIC U.S. Geological Survey 1400 Independence Rd., MS231 Rolla, MO 65401-2602 Phone (314)341-0851 Facsimile (314)341-9375 E-mail to esic@mcdgs91.cr.usgs.gov World Wide Web: http://mcmcweb.cr.usgs.gov/gdc/ 2.5.2.2 SOURCE USED CITATION ABBREVIATION: map1 2.5.2.3 PROCESS DATE: Varies by quad --Spatial Data Organization Information-- 3.2 DIRECT SPATIAL REFERENCE METHOD: "Raster" -Raster Object Information- 3.4.1 RASTER OBJECT TYPE: "Pixel" 3.4.2 ROW COUNT: Varies by quad 3.4.3 COLUMN COUNT: Varies by quad --Spatial Reference Information-- -Horizontal Coordinate System Definition- Planar 4.1.2.2.1 GRID COORDINATE SYSTEM NAME: "Universal Transverse Mercator" Universal Transverse Mercator (UTM) 4.1.2.2.2.1 UTM ZONE NUMBER: 10 or 11 (Varies by quad) Transverse Mercator 4.1.2.1.2.17 SCALE FACTOR AT CENTRAL MERIDIAN: 0.9996 4.1.2.1.2.2 LONGITUDE AT CENTRAL MERIDIAN: -123.000 (Zone 10) -117.000 (Zone 11) 4.1.2.1.2.3 LATITUDE OF PROJECTION ORIGIN: 0.0 4.1.2.1.2.4 FALSE EASTING: 500000. 4.1.2.1.2.5 FALSE NORTHING: 0.0 --Planar Coordinate Information-- 4.1.2.4.1 PLANAR COORDINATE ENCODING METHOD: "row and column" -Coordinate Representation- 4.1.2.4.2.1 ABSCISSA RESOLUTION: 25.40000078 4.1.2.4.2.2 ORDINATE RESOLUTION: -25.40000078 4.1.2.4.4 PLANAR DISTANCE UNITS: "meters" -Geodetic Model- 4.1.4.1 HORIZONTAL DATUM NAME: North American Datum 1927 4.1.4.2 ELLIPSOID NAME: Clarke 1866 4.1.4.3 SEMI-MAJOR AXIS: 6378206.4 4.1.4.4 DENOMINATOR OF FLATTENING RATIO: 294.98 --Entity and Attribute Information-- -Overview Description- 5.2.1 Each raster entity or pixel contains a color index 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. USGS DRG Color Palette Digital Number Color Red Green Blue 0 Black 0 0 0 1 White 255 255 255 2 Blue 0 151 164 3 Red 203 0 23 4 Brown 131 66 37 5 Green 201 234 157 6 Purple 137 51 128 7 Yellow 255 234 0 8 Light Blue 167 226 226 9 Light Red 255 184 184 10 Light Purple 218 179 214 11 Light Grey 209 209 209 12 Light Brown 207 164 142 5.2.2 ENTITY AND ATTRIBUTE DETAIL CITATION: Draft Standards for Digital Raster Graphic. --Distribution Information-- -Distributor- Contact Organization Primary 10.1.2 CONTACT ORGANIZATION: Earth Science Information Center, U.S. Geological Survey Contact Address 10.4.1 ADDRESS TYPE: "mailing address" 10.4.2 ADDRESS: 507 National Center 10.4.3 CITY: Reston 10.4.4 STATE OR PROVINCE: Virginia 10.4.5 POSTAL CODE: 22092 10.5 CONTACT VOICE TELEPHONE: 1 800 USA MAPS 10.5 CONTACT VOICE TELEPHONE: 1 703 648 6045 6.3 DISTRIBUTION LIABILITY: 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. -Standard Order Process- Digital Form Digital Transfer Information 6.4.2.1.1 FORMAT NAME: TIFF 6.4.2.1.2 FORMAT VERSION NUMBER: 6.0 6.4.2.1.6 FILE DECOMPRESSION TECHNIQUE: Packbits Digital Transfer Option Offline Options 6.4.2.2.2.1 OFFLINE MEDIA: "CD-ROM" 6.4.2.2.2.3 RECORDING FORMAT: "ISO 9660"; DRG image files with corresponding metadata files. 6.4.3 FEES: For delivery on CD-ROM, the charge is $32 per CD-ROM --Metadata Reference Information-- 7.1 METADATA DATE: Varies by quad Metadata Contact Contact Organization Primary 10.1.2 CONTACT ORGANIZATION: U.S. Geological Survey Contact Address 10.4.1 ADDRESS TYPE: "mailing address" 10.4.2 ADDRESS: 590 National Center 10.4.3 CITY: Reston 10.4.4 STATE OR PROVINCE: Virginia 10.4.5 POSTAL CODE: 22092 10.5 CONTACT VOICE TELEPHONE: 1 703 648 4533 10.8 CONTACT ELECTRONIC MAIL ADDRESS: Copies of this publication are available from anonymous File Transfer Protocol (anonymous FTP); ftp://fgdc.er.usgs.gov/ 7.5 METADATA STANDARD NAME: "Content Standards for Digital Geospatial Metadata" 7.6 METADATA STANDARD VERSION: 19940608 --- end USGS-provided metadata modified by DFG for CA vicinity set --- -- END ORIGINAL DRG METADATA -- Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: various Currentness_Reference: publication date Status: Progress: Complete Maintenance_and_Update_Frequency: As needed Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -130.057912 East_Bounding_Coordinate: -109.942098 North_Bounding_Coordinate: 45.234827 South_Bounding_Coordinate: 30.485414 Keywords: Theme: Theme_Keyword_Thesaurus: none Theme_Keyword: maps Theme_Keyword: DRG Theme_Keyword: topo Theme_Keyword: topos Theme_Keyword: quads Theme_Keyword: quad Theme_Keyword: quadrangles Theme_Keyword: quadrangle Theme_Keyword: topographic map Theme_Keyword: boundaries Theme_Keyword: farming Theme_Keyword: biota Theme_Keyword: economy Theme_Keyword: planningCadastre Theme_Keyword: society Theme_Keyword: elevation Theme_Keyword: environment Theme_Keyword: structure Theme_Keyword: geoscientificInformation Theme_Keyword: health Theme_Keyword: imageryBaseMapsEarthCover Theme_Keyword: inlandWaters Theme_Keyword: location Theme_Keyword: intelligenceMilitary Theme_Keyword: oceans Theme_Keyword: transportation Theme_Keyword: utilitiesCommunication Place: Place_Keyword_Thesaurus: none Place_Keyword: California Access_Constraints: none Use_Constraints: none Native_Data_Set_Environment: Microsoft Windows 2000 Version 5.0 (Build 2195) Service Pack 2; ESRI ArcCatalog 8.2.0.700 Data_Quality_Information: Lineage: Process_Step: Process_Description: Metadata imported. Source_Used_Citation_Abbreviation: S:\Maps\DRG_250K_Mosaics\drg_250k_mosaics.xml Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Raster Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Planar: Map_Projection: Map_Projection_Name: Albers Conical Equal Area Albers_Conical_Equal_Area: Standard_Parallel: 34.000000 Standard_Parallel: 40.500000 Longitude_of_Central_Meridian: -120.000000 Latitude_of_Projection_Origin: 0.000000 False_Easting: 0.000000 False_Northing: -4000000.000000 Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: coordinate pair Coordinate_Representation: Planar_Distance_Units: meters Geodetic_Model: Horizontal_Datum_Name: North American Datum of 1983 Ellipsoid_Name: Geodetic Reference System 80 Semi-major_Axis: 6378137.000000 Denominator_of_Flattening_Ratio: 298.257222 Entity_and_Attribute_Information: Distribution_Information: Resource_Description: Downloadable Data Metadata_Reference_Information: Metadata_Date: 20031022 Metadata_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: California Department of Fish and Game Contact_Person: GIS Service Center Contact_Address: Contact_Electronic_Mail_Address: geodata@dfg.ca.gov Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998 Metadata_Time_Convention: local time Metadata_Extensions: Online_Linkage: http://www.esri.com/metadata/esriprof80.html Profile_Name: ESRI Metadata Profile