Digital Raster Graphic (DRG), Barrow (A1-5, B3-4), Alaska

Metadata:

• Identification_Information
• Data_Quality_Information
• Spatial_Data_Organization_Information
• Spatial_Reference_Information
• Entity_and_Attribute_Information
• Distribution_Information
• Metadata_Reference_Information

Identification_Information:

Citation:

Citation_Information:

Originator: USGS

Publication_Date: 1955

Publication_Time: Unknown

Title: Digital Raster Graphic (DRG), Barrow (A1-5, B3-4), Alaska

Geospatial_Data_Presentation_Form: raster digital data

Series_Information:

Publication_Information:

Publication_Place: Reston, VA

Publisher: USGS

Online_Linkage: <http://agdc.usgs.gov/data/usgs/geodata/drg/temp/drglist_B.html>

Larger_Work_Citation:

Citation_Information:

Originator: USGS

Publication_Date: 1955

Title: Barrow A and B series Mosaic

Geospatial_Data_Presentation_Form: map

Online_Linkage: <ftp://agdcftp1.wr.usgs.gov/pub/usgs/drg/data/i71156c3.tif.gz>

Description:

Abstract:

The A and B series 1:63,360 Barrow USGS DRGs. The Digital Raster Graphic (DRG) is a raster image of a scanned USGS topographic map including the collar information, georeferenced to the UTM grid.

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. Seven of the USGS DRGs were mosaiced to create this dataset.

Supplemental_Information:

The DRGs were reprojected to UTM zone 4, WGS84, then merged using the arcgis "merge" command. Text coordinates in the collar on the DRG will not match with reprojected quad coordinates.

Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 1955

Currentness_Reference: publication date

Status:

Progress: Complete

Maintenance_and_Update_Frequency: None planned

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -157.5

East_Bounding_Coordinate: -154.5

North_Bounding_Coordinate: 71.5

South_Bounding_Coordinate: 71

Keywords:

Theme:

Theme_Keyword_Thesaurus: None

Theme_Keyword: DRG

Theme_Keyword: USGS

Theme_Keyword: digital raster graphic

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: Point Barrow

Place_Keyword: Alaska

Place_Keyword: North Slope

Place_Keyword: US

Access_Constraints: None

Use_Constraints:

It is not recommended that the data be used at a scale larger than 1 to 63,360. Use at your own risk. Acknowledgment of the USGS and the University of Colorado would be appreciated in products derived from these data.

Point_of_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Leanne R. Lestak

Contact_Organization:

University of Colorado, Cooperative Institute for Research in the Environmental Sciences (CIRES)

Contact_Position: GIS Specialist

Contact_Address:

Address_Type: mailing and physical address

Address: UCB 216

Address: CIRES Building, Room 318

City: Boulder

State_or_Province: CO

Postal_Code: 80309-0216

Country: USA

Contact_Voice_Telephone: 303-492-5802

Contact_Facsimile_Telephone: 303-492-1149

Contact_Electronic_Mail_Address: lestak@cires.colorado.edu

Data_Set_Credit:

Leanne R. Lestak, University of Colorado, CIRES This DRG was produced through an Innovative Partnership agreement between The Land Information Technology Company, Ltd., of Aurora, CO and the USGS.

Security_Information:

Security_Classification_System: None

Security_Classification: Unclassified

Native_Data_Set_Environment:

Microsoft Windows 2000 Version 5.0 (Build 2195) Service Pack 3; ESRI ArcCatalog 8.3.0.800

Cross_Reference:

Citation_Information:

Series_Information:

Publication_Information:

Larger_Work_Citation:

Citation_Information:

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 DRG's 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.

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: 1955

Publication_Time: Unknown

Title: Barrow A and B series

Geospatial_Data_Presentation_Form: map

Series_Information:

Publication_Information:

Publication_Place: Reston, VA

Publisher: USGS

Online_Linkage: <ftp://agdcftp1.wr.usgs.gov/pub/usgs/drg/data/i71156c3.tif.gz>

Source_Scale_Denominator: 63360

Type_of_Source_Media: paper

Source_Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 1955

Time_of_Day: unknown

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 (573)308-3500 Facsimile (573)308-3615 E-mail to mcmcesic@usgs.gov World Wide Web: <http://mcmcweb.er.usgs.gov/drg/>

Source_Used_Citation_Abbreviation: map1

Process_Date: 19970903

Process_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Leanne R. Lestak

Contact_Organization: University of Colorado - CIRES

Contact_Position: GIS Specialist

Contact_Address:

Address_Type: mailing and physical address

Address: UCB 216

Address: CIRES Building, Room 318

City: Boulder

State_or_Province: CO

Postal_Code: 80309-0216

Country: USA

Contact_Voice_Telephone: 303-492-5802

Contact_Facsimile_Telephone: 303-492-1149

Contact_Electronic_Mail_Address: lestak@cires.colorado.edu

Process_Step:

Process_Description: Metadata imported.

Process_Step:

Process_Description: Dataset copied.

Source_Used_Citation_Abbreviation: D:\Bathymetry\noaachart\topocovs\bath_noaa

Process_Step:

Process_Description: Metadata imported.

Source_Used_Citation_Abbreviation:

D:\GIS_stuff\metadata_templates\anscia-template\bath_noaa\metadata.xml

Spatial_Data_Organization_Information:

Direct_Spatial_Reference_Method: Raster

Raster_Object_Information:

Raster_Object_Type: Pixel

Row_Count: 10253

Column_Count: 17736

Vertical_Count: 1

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Planar:

Grid_Coordinate_System:

Grid_Coordinate_System_Name: Universal Transverse Mercator

Universal_Transverse_Mercator:

UTM_Zone_Number: 4

Transverse_Mercator:

Scale_Factor_at_Central_Meridian: 0.9996

Longitude_of_Central_Meridian: -159

Latitude_of_Projection_Origin: 0

False_Easting: 500000

False_Northing: 0

Planar_Coordinate_Information:

Planar_Coordinate_Encoding_Method: row and column

Coordinate_Representation:

Abscissa_Resolution: 6.437376

Ordinate_Resolution: 6.437376

Geodetic_Model:

Horizontal_Datum_Name: World Geodetic Survey 1984

Ellipsoid_Name: WGS84

Vertical_Coordinate_System_Definition:

Depth_System_Definition:

Entity_and_Attribute_Information:

Detailed_Description:

Entity_Type:

Entity_Type_Label: Band_1

Attribute:

Attribute_Label: ObjectID

Attribute_Definition: Internal feature number.

Attribute_Definition_Source: ESRI

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: 999

Enumerated_Domain_Value_Definition: No known depth value

Unrepresentable_Domain:

Sequential unique whole numbers that are automatically generated.

Attribute:

Attribute_Label: Value

Attribute:

Attribute_Label: Red

Attribute:

Attribute_Label: Green

Attribute:

Attribute_Label: Blue

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

Entity_and_Attribute_Detail_Citation: Draft Standards for Digital Raster Graphic.

Distribution_Information:

Distributor:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Leanne R. Lestak

Contact_Organization: University of Colorado - CIRES

Contact_Position: GIS Specialist

Contact_Address:

Address_Type: mailing and physical address

Address: 216 UCB

Address: CIRES Building, Room 318

City: Boulder

State_or_Province: CO

Postal_Code: 80309-0216

Country: USA

Contact_Voice_Telephone: 303-492-5802

Contact_Facsimile_Telephone: 303-492-1149

Contact_Electronic_Mail_Address: lestak@cires.colorado.edu

Resource_Description: Contact Distributor

Distribution_Liability:

Users must assume responsibility to determine the usability of this data for their purposes. The University of Colorado makes no express or implied warranties - including warranties of merchantability or fitness - with respect to the character, function, or capabilities of the electronic services or products or their appropriateness for any user's purposes. In no event will the University of Colorado be liable for any incidental, indirect, special, consequential or other damages suffered by the user or any other person or entity whether from the use of the electronic services or products, any failure thereof or otherwise, and in no event will the University of Colorado's liability to the requestor or anyone else exceed the fee paid for the electronic service or product.

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.

Standard_Order_Process:

Digital_Form:

Digital_Transfer_Information:

Transfer_Size: 173.503

Fees: None

Ordering_Instructions: Contact Distributor

Custom_Order_Process: Contact Distributor

Metadata_Reference_Information:

Metadata_Date: 20030521

Metadata_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Leanne R. Lestak

Contact_Organization: University of Colorado - CIRES

Contact_Position: GIS Specialist

Contact_Address:

Address_Type: mailing and physical address

Address: UCB 216

Address: CIRES Building, Room 318

City: Boulder

State_or_Province: CO

Postal_Code: 80309-0216

Country: USA

Contact_Voice_Telephone: 303--492-5802

Contact_Facsimile_Telephone: 303-492-1149

Contact_Electronic_Mail_Address: lestak@cires.colorado.edu

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