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Digital Raster Graphic - Quad 140 - BAXTER LAKE, NH

Digital Raster Graphic - Quad 140 - BAXTER LAKE, NH

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Metadata:


Identification_Information:
Citation:
Citation_Information:
Originator: Complex Systems Research Center, University of New Hampshire
Publication_Date: 19980201
Title: Digital Raster Graphic - Quad 140 - BAXTER LAKE, NH
Edition: One
Geospatial_Data_Presentation_Form: Map
Publication_Information:
Publication_Place: Durham, New Hampshire
Publisher: Complex Systems Research Center, University of New Hampshire
Other_Citation_Details: None
Online_Linkage:
<URL:http://www.granit.sr.unh.edu/cgi-bin/nhsearch?dset=drg/drg140>
Larger_Work_Citation:
Citation_Information:
Originator: Complex Systems Research Center, University of New Hampshire
Publication_Date: 19860101
Title: NH GRANIT Database
Publication_Information:
Publication_Place: Durham, New Hampshire
Publisher: Complex Systems Research Center, University of New Hampshire
Online_Linkage: <URL:http://www.granit.sr.unh.edu>
Description:
Abstract:
A DRG is a scanned image of a USGS topographic map. The scanned images distributed through GRANIT include only the map body, and exclude any of the map collar information printed on the paper quads. (For those interested in the complete map as printed, they may be acquired from USGS (<URL:http://edcwww.cr.usgs.gov/webglis>.)

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, such as DLG data. When the DRG is combined with other digital products, such as DOQ or DEM, the resulting image provides additional visual information for the extraction and revision of base cartographic information.

Purpose:
Because the DRG's are georeferenced to the surface of the Earth, they mey be readily used as a layer in a geographic information system. They are commonly used as background layers, and as a means to perform quality assurance on other digital products. The DRGs can also be merged with other digital data (e.g. digital elevation models or digital orhophotoquads) to produce a hybrid digital file.
Supplemental_Information: Data distribution tile: 7.5-minute quadrangle.
Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 1987
Currentness_Reference: Ground Condition
Status:
Progress: In work
Maintenance_and_Update_Frequency: Irregular
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -71.125
East_Bounding_Coordinate: -71.000
North_Bounding_Coordinate: 43.375
South_Bounding_Coordinate: 43.250
Keywords:
Theme:
Theme_Keyword_Thesaurus: None
Theme_Keyword: DRG
Theme_Keyword: Digital Raster Graphic
Theme_Keyword: Topographic Map
Theme_Keyword: Contour Line
Theme_Keyword: Digital Contours
Place:
Place_Keyword_Thesaurus: None
Place_Keyword: United States
Place_Keyword: Northeast
Place_Keyword: New England
Place_Keyword: New Hampshire
Place_Keyword: BAXTER LAKE, NH
Access_Constraints:
Acknowledgement of GRANIT and the US Geological Survey would be appreciated in products derived from these data.
Use_Constraints: Not for legal use
Point_of_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Complex Systems Research Center
Contact_Person: GRANIT Database Manager
Contact_Position: GRANIT Database Manager
Contact_Address:
Address_Type: mailing and physical address
Address: Morse Hall, University of New Hampshire
City: Durham
State_or_Province: NH
Postal_Code: 03824
Country: US
Contact_Voice_Telephone: 603-862-1792
Contact_Facsimile_Telephone: 603-862-0188
Contact_Electronic_Mail_Address: granit@unh.edu
Hours_of_Service: 8:30AM-5PM, EST
Browse_Graphic:
Browse_Graphic_File_Name:
<URL:http://www.granit.sr.unh.edu/cgi-bin/load_file?PATH=/data/database/d-webdata/drg/browse.gif>
Browse_Graphic_File_Description: gif image file
Browse_Graphic_File_Type: gif
Data_Set_Credit: GRANIT database
Native_Data_Set_Environment:
Tif image


Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
The DRG is an 8-bit color image which employs a color palette to ensure uniform colors throughout a particular DRG series. The 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 output device (e.g. monitor or printer) affects the DRG color displayed.
Logical_Consistency_Report: Not Applicable
Completeness_Report:
The Digital Raster Graphic (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 digital raster graphic 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/inclusion criteria, see USGS National Mapping Division Product Standards for DLG and Quadrangle Maps, published as the Technical Instructions.
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
Refer to the published map series for information about horizontal positional accuracy. However, note that the GRANIT image is re-cast onto the NH State Plane coordinate system.
Vertical_Positional_Accuracy:
Vertical_Positional_Accuracy_Report:
Refer to the published map series for information about vertical positional accuracy. However, note that the GRANIT image is re-cast onto the NH State Plane coordinate system.
Lineage:
Source_Information:
Source_Citation:
Citation_Information:
Originator:
US Geological Survey or another mapping agency in cooperation with USGS
Publication_Date: 1987
Title: Digital Raster Graphics
Edition: 1
Geospatial_Data_Presentation_Form: map
Publication_Information:
Publication_Place: Reston, VA
Publisher: US Geological Survey
Other_Citation_Details: None
Online_Linkage: <URL:http://edcwww.cr.usgs.gov/webglis>
Larger_Work_Citation:
Citation_Information:
Originator: US Geological Survey
Publication_Date: Unknown
Title: National Cartographic Database
Publication_Information:
Publication_Place: Reston, VA
Publisher: US Geological Survey
Online_Linkage: <URL:http://www.usgs.gov>
Source_Scale_Denominator: 24000
Type_of_Source_Media: Digital file
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 1987
Source_Currentness_Reference: Publication Date
Source_Citation_Abbreviation: DRG-2
Source_Contribution:
The USGS DRG files provided the basic information for the GRANIT DRG's. They were then re-processed as described below.
Source_Information:
Source_Citation:
Citation_Information:
Originator: US Geological Survey
Publication_Date: 1987
Title: 7.5-minute Topographic Quadrangle Series
Edition: 1
Geospatial_Data_Presentation_Form: map
Publication_Information:
Publication_Place: Reston, VA
Publisher: US Geological Survey
Other_Citation_Details: None
Online_Linkage: <URL:http://edcwww.cr.usgs.gov/webglis>
Larger_Work_Citation:
Citation_Information:
Originator: US Geological Survey
Publication_Date: Unknown
Title: National Cartographic Database
Publication_Information:
Publication_Place: Reston, VA
Publisher: US Geological Survey
Online_Linkage: <URL:http://www.usgs.gov>
Source_Scale_Denominator: 24000
Type_of_Source_Media: paper
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 1987
Source_Currentness_Reference: Publication Date
Source_Citation_Abbreviation: MAP-1
Source_Contribution:
The source map is scanned to produce the Digital Raster Graphic.
Process_Step:
Process_Description:
The source DRG files were reprocessed to conform to GRANIT database standards. Key elements of the processing included:

- reprojecting the spatial data from UTM meters (Zone 18/19), NAD27 to NH State Plane feet, Zone 4676, NAD83. - clipping out the map body from the full image (to allow for mosaicing of adjacent quadrangles)

The specific steps applied to each data file included the following:

1. Data for each quad was retrieved from the USGS as a tif image (with associated tfw, or tif world file) 2. In Arc/Info: a. Convert the TIFFs to GRIDS (using IMAGEGRID)

b. Reproject the GRID to NH State Plane feet, NAD83

c. Clip out only the map body using the GRANIT 7.5-minute quadrangle overlay coverage

d. Run GRIDIMAGE to convert the GRID back into a tiff format

e. MrSIDs - Convert TIFF image to geo-referenced MrSID with 1:20 encoding ratio

Source_Used_Citation_Abbreviation: DRG-2
Process_Date: 19980321
Source_Produced_Citation_Abbreviation: Version 1
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Organization: Complex Systems Research Center
Contact_Person: GRANIT Database Manager
Contact_Position: GRANIT Database Manager
Contact_Address:
Address_Type: mailing and physical address
Address: Morse Hall, University of New Hampshire
City: Durham
State_or_Province: NH
Postal_Code: 03824
Country: US
Contact_Voice_Telephone: 603-862-1792
Contact_Facsimile_Telephone: 603-862-0188
Contact_Electronic_Mail_Address: granit@unh.edu
Hours_of_Service: 8:30AM-5PM, EST
Process_Step:
Process_Description:
All preliminary process steps were performed by USGS in the development of the source DRG's, as described below.

The production procedures, instrumentation, hardware and software used in the collection of standard U.S. Geological Survey (USGS) Digital Raster Graphic (DRG) products vary depending on systems used at the contract, cooperator or National Mapping Division (NMD) production sites. The majority of DRG datasets are acquired through government contract. The process step below describes, in general, the process used in the production of standard USGS DRG datasets.

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. An output resolution of 2.4 meters (7.9 feet) is chosen in order to resample the file to 250 dots per inch (dpi). 3. 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.

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 to 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 to the corresponding image points in the DRG.

Source_Used_Citation_Abbreviation: MAP-1
Process_Date: unknown


Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method: Raster
Raster_Object_Information:
Raster_Object_Type: Pixel


Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Planar:
Grid_Coordinate_System:
Grid_Coordinate_System_Name: State Plane Coordinate System 1983
State_Plane_Coordinate_System:
SPCS_Zone_Identifier: New Hampshire
Transverse_Mercator:
Scale_Factor_at_Central_Meridian: 0.999967
Longitude_of_Central_Meridian: -71.666667
Latitude_of_Projection_Origin: 42.500000
False_Easting: 984249.999900
False_Northing: 0.000000
Planar_Coordinate_Information:
Planar_Coordinate_Encoding_Method: Row and column
Coordinate_Representation:
Abscissa_Resolution: 2.4
Ordinate_Resolution: 2.4
Planar_Distance_Units: feet
Geodetic_Model:
Horizontal_Datum_Name: North American Datum of 1983
Ellipsoid_Name: GRS 80
Semi-major_Axis: 20925604.4720406
Denominator_of_Flattening_Ratio: 298.26


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 standard colors used in the DRG are defined. Value 15 is reserved for "no data".

COLOR INDEX COLOR R G B

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 Light 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 Gray 209 209 209 12 Light Brown 207 164 142

15 "No Data"

For those using these files in ArcView or ArcGIS, set color 15 to "no color".

Entity_and_Attribute_Detail_Citation:
See Draft Standards for Digital Raster Graphic from USGS.


Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Complex Systems Research Center
Contact_Person: GRANIT Database Manager
Contact_Position: GRANIT Database Manager
Contact_Address:
Address_Type: mailing and physical address
Address: Morse Hall, University of New Hampshire
City: Durham
State_or_Province: NH
Postal_Code: 03824
Country: US
Contact_Voice_Telephone: 603-862-1792
Contact_Facsimile_Telephone: 603-862-0188
Contact_Electronic_Mail_Address: granit@unh.edu
Hours_of_Service: 8:30AM-5PM, EST
Resource_Description: DRG140 - Digital Raster Graphic for Quad 140
Distribution_Liability:
Digital data in NH GRANIT represent the efforts of the contributing agencies to record information from the cited source materials. Complex Systems Research Center, under contract to the NH Office of State Planning, and in consultation with cooperating agencies, maintains a continuing program to identify and correct errors in these data. OSP, CSRC, and the cooperating agencies make no claim as to the validity or reliability or to any implied uses of these data.
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: TIFF, MrSID
Transfer_Size: 6 Mb (TIFF), 3 Mb (MrSID)
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name: <URL:http://www.granit.sr.unh.edu>
Fees:
No charge when downloaded from the internet. Cost of reproduction for provision on CD/ROM or other media.
Ordering_Instructions:
Mail or fax a copy of the GRANIT "Data Request Form" from the GRANIT Data Catalog. Delivery Time: Two weeks
Technical_Prerequisites:
None


Metadata_Reference_Information:
Metadata_Date: 20000621
Metadata_Review_Date: 20000621
Metadata_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Complex Systems Research Center
Contact_Person: GRANIT Database Manager
Contact_Position: GRANIT Database Manager
Contact_Address:
Address_Type: Mailing and physical address
Address: Morse Hall, University of New Hampshire
City: Durham
State_or_Province: NH
Postal_Code: 03824
Country: US
Contact_Voice_Telephone: 603-862-1792
Contact_Facsimile_Telephone: 603-862-0188
Contact_Electronic_Mail_Address: granit@unh.edu
Hours_of_Service: 8:30AM-5PM, EST
Metadata_Standard_Name: FGDC CSDGM
Metadata_Standard_Version: FGDC-STD-001-1998

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