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Identification_Information:
Citation:
Citation_Information:
Originator: USGS
Publication_Date: 19980228
Title: Digital Raster Graphic (WiDNR WTM83/91 Version)
Geospatial_Data_Presentation_Form: map
Publication_Information:
Publication_Place: Madison, WI
Publisher: Wisconsin Department of Natural Resources (WiDNR)
Online_Linkage:
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. DRGs can also be merged with other digital data, e.g. DEMs or DOQs, to produce a hybrid digital file. Supplemental_Information: 405810.702335, 4664797.365277 [The preceding is from the original USGS DRG metadata.] Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: VARIES; refer to the original USGS DRG metadata or to the DRG 'map collars' for specific information. Currentness_Reference: Ground condition Status: Progress: Complete Maintenance_and_Update_Frequency: Irregular Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -92.75 East_Bounding_Coordinate: -87.08 North_Bounding_Coordinate: 47.08 South_Bounding_Coordinate: 42.50 Keywords: Theme: Theme_Keyword_Thesaurus: none Theme_Keyword: digital raster graphic Theme_Keyword: DRG Theme_Keyword: topographic map Place: 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. Place_Keyword: WI Access_Constraints: None Use_Constraints: Acknowledgment of the USGS would be appreciated in products derived from these data. Point_of_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: Wisconsin Department of Natural Resources (WiDNR), Bureau of Enterprise Information Technology and Applications (BEITA), Geographic Services Section (GEO), ET/8 Contact_Person: Lance Perry Contact_Address: Address_Type: mailing address Address: Mailcode: ET/8 101 South Webster Street P.O. Box 7921 City: Madison State_or_Province: Wisconsin (WI) Postal_Code: 53707-7921 Country: United States of America (USA) Contact_Voice_Telephone: (608) 267-5181 Contact_Facsimile_Telephone: (608) 266-0870 Contact_Electronic_Mail_Address: perryl@dnr.state.wi.us 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. Native_Data_Set_Environment: TIFF; Data Format Version Number - 6.0; Resident Computer Operating System - DEC (Digital Equipment Corporation) Alpha 2100 server running Pathworks and OSF version 4.0a (Digital Unix); Resident Size of Dataset - Approx. 5-12 MB per DRG Data_Quality_Information: Attribute_Accuracy: 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 DRGs within a series must have the same RGB value. Logical_Consistency_Report: Not Applicable 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: 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. [NOTE: The preceding is from the original USGS DRG metadata. Refer to the Lineage section of this metadata report for information about subsequent DRG processing by WiDNR.] Vertical_Positional_Accuracy: Vertical_Positional_Accuracy_Report: Refer to the DRG collar for information about vertical positional accuracy. Lineage: Source_Information: Source_Citation: Citation_Information: Originator: USGS Publication_Date: Varies Title: Varies Geospatial_Data_Presentation_Form: Map Publication_Information: Publication_Place: Reston, VA Publisher: USGS Source_Scale_Denominator: 24000 Type_of_Source_Media: Paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: Varies Source_Currentness_Reference: Ground condition Source_Citation_Abbreviation: map1 Source_Contribution: The source map is scanned to produce the DRG. Process_Step: 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/ [The preceding Lineage information is from the original USGS metadata. The following paragraphs describe subsequent processing carried out by the WiDNR Geographic Services Section after receiving copies of the USGS DRG product described above.] 8. The 'collar' surrounding the map portion of each DRG containing ancillary information about the printed map, such as scale bars, legend and attribution, was reclassified by WiDNR to a distinct range of pixel values in the scanned image (values 20 through 32). This enables ArcView users to optionally 'turn off' the DRG map collar for display purposes. 9. The DRGs were converted to the Wisconsin Transverse Mercator (WTM) coordinate system, based on the 1991 adjustment to the North American Datum of 1983 (NAD83/91). Source_Used_Citation_Abbreviation: map1 Process_Date: 19980228 Spatial_Data_Organization_Information: Indirect_Spatial_Reference: None Direct_Spatial_Reference_Method: Raster Raster_Object_Information: Raster_Object_Type: Pixel Row_Count: Varies Column_Count: Varies Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Planar: Grid_Coordinate_System: Grid_Coordinate_System_Name: Wisconsin Transverse Mercator (WTM) Other_Grid_System's_Definition: Name: WTM 83 (Wisconsin Transverse Mercator, NAD83/91) Projection: Transverse Mercator Scale_Factor_at_Central_Meridian 0.9996 Longitude_of_Central_Meridian -90.000 Latitude_of_Projection_Origin 0.0 False_Easting 520000.0 False_Northing -4480000.0 Citation 'Wisconsin Coordinate Systems', published by the Wisconsin State Cartographer's Office, 1995, Madison, Wisconsin Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: row and column Coordinate_Representation: Abscissa_Resolution: 2.438400 Ordinate_Resolution: 2.438400 Planar_Distance_Units: meters Geodetic_Model: Horizontal_Datum_Name: NAD83/91 Ellipsoid_Name: GEODETIC REFERENCE SYSTEM 80 (GRS80) Semi-major_Axis: 6378137 Denominator_of_Flattening_Ratio: 298.25722210088 Entity_and_Attribute_Information: Overview_Description: Entity_and_Attribute_Overview: 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 The above color palette information applies for the map portion of the DRGs. Following WiDNR processing of the DRG "map collars", the following color palette applies for the map collar potion of the DRGs: DRG Map Collar Color Palette Digital Number Color Red Green Blue 20 Black 0 0 0 21 White 255 255 255 22 Blue 0 151 164 23 Red 203 0 23 24 Brown 131 66 37 25 Green 201 234 157 26 Purple 137 51 128 27 Yellow 255 234 0 28 Light Blue 167 226 226 29 Light Red 255 184 184 30 Light Purple 218 179 214 31 Light Grey 209 209 209 32 Light Brown 207 164 142 Entity_and_Attribute_Detail_Citation: Draft Standards for Digital Raster Graphic. Distribution_Information: Distributor: Contact_Information: Contact_Person_Primary: Contact_Person: Brad Duncan Contact_Organization: WiDNR/Geographic Services Section Contact_Address: Address_Type: mailing address Address: 101 S. Webster St., P.O. Box 7921 City: Madison State_or_Province: Wisconsin (WI) Postal_Code: 53707-7921 Country: United States of America (USA) Contact_Voice_Telephone: (608) 267-5182 Contact_Electronic_Mail_Address: duncab@dnr.state.wi.us Distribution_Liability: WiDNR and its GIS database cooperators will not be liable in any way for the accuracy of these data, and assume no responsibility whatsoever for direct, indirect, special, consequential, exemplary, or other damages. The burden for determining fitness for use rests entirely upon the data requester. For more information, refer to the DNR 'Legal Notices, Disclaimers, and Terms of Use' page at the following URL: < http://www.dnr.state.wi.us/org/legal/WebSiteLegalInformation.html> Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: TIFF Format_Version_Number: 6.0 File_Decompression_Technique: Packbits Transfer_Size: Approx. 5-12 MB per DRG Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: Data and accompanying documentation can be downloaded by web browser at the following URL: Fees: Fees for obtaining copies of WiDNR data sets are intended to cover the cost of reproduction and vary depending on the particular data set and the requested type of transfer media. The fees for standard data requests generally include a $50 order processing fee, a data layer handling fee of $50 per data layer, and a transfer media fee of $40 per CD or magnetic tape cartridge. There is no transfer media fee when data are obtained via the internet. Refer to the 'WiDNR GIS Datasharing Policy' at Metadata_Reference_Information: Metadata_Date: 199902 Metadata_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: John Laedlein Contact_Organization: WiDNR/Geographic Services Section Contact_Address: Address_Type: mailing address Address: 101 South Webster St., P.O. Box 7921, City: Madison State_or_Province: WI Postal_Code: 53707-7921 Contact_Voice_Telephone: (608) 264-8916 Contact_Electronic_Mail_Address: |
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