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1992 Digital Orthophoto Quadrangle - 1:12,000-Scale - Quad 157SW - WALPOLE

1992 Digital Orthophoto Quadrangle - 1:12,000-Scale - Quad 157SW - WALPOLE

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Metadata:


Identification_Information:
Citation:
Citation_Information:
Originator: Complex Systems Research Center, University of New Hampshire
Publication_Date: 19980101
Title:
1992 Digital Orthophoto Quadrangle - 1:12,000-Scale - Quad 157SW - WALPOLE
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=92doq/92doq157sw>
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:
The data set contains 1:12,000-scale, 1-meter resolution, black & white orthophotoquads, compressed from TIFFs to MrSID format.

Orthophotos combine the image characteristics of a photograph with the geometric qualities of a map. The primary digital orthophotoquad (DOQ) is a 1-meter ground resolution, quarter-quadrangle (3.75-minutes of latitude by 3.75-minutes of longitude) image. The geographic extent of the DOQ is equivalent to a standard quarter-quadrangle. The normal orientation of data is by lines (rows) and samples (columns). Each line contains a series of pixels ordered from west to east with the order of the lines from north to south. The radiometric image brightness values are stored as 256 gray levels ranging from 0 to 255. While the original USGS format for distribution of DOQs is TIFF images, GRANIT distributes the data in both MrSID and the original TIFF formats.

The metadata record provided with the DOQ contains a wide range of descriptive information including format source information, production instrumentation and dates, and data to assist with displaying and georeferencing the image. In addition to this file, the original USGS header file, including source and coordination information, is available upon request. However, please note that it will not reflect processing completed at Complex Systems Research Center (see DATA_QUALITY_INFORMATION below).

Purpose:
DOQ's serve a variety of purposes, from interim maps to field references for earth science investigations and analysis. The DOQ is useful as a layer of a geographic information system and as a tool for revision of digital line graphs and topographic maps.
Supplemental_Information:
Data distribution tile: quarter of a 7.5-minute quadrangle (e.g. 3.75 x 3.75 minutes) or full 7.5-minute quadrangle
Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 051292
Currentness_Reference: ground condition
Status:
Progress: In work
Maintenance_and_Update_Frequency: Irregular
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -72.500
East_Bounding_Coordinate: -72.437
North_Bounding_Coordinate: 43.063
South_Bounding_Coordinate: 43.000
Keywords:
Theme:
Theme_Keyword_Thesaurus: None
Theme_Keyword: DOQ
Theme_Keyword: DOQQ
Theme_Keyword: digital orthophoto
Theme_Keyword: digital orthophotoquad
Theme_Keyword: digital image map
Theme_Keyword: aerial photograph
Theme_Keyword: rectified photograph
Theme_Keyword: rectified image
Theme_Keyword: orthophoto
Theme_Keyword: quarter-quadrangle orthophoto
Theme_Keyword: 1-meter orthophoto
Theme_Keyword: 3.75- x 3.75-minute orthophoto
Theme_Keyword: 7.5- x 7.5-minute orthophoto
Place:
Place_Keyword_Thesaurus: None
Place_Keyword: United States
Place_Keyword: Northeast
Place_Keyword: New England
Place_Keyword: New Hampshire
Place_Keyword: WALPOLE
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/92doq/browse.gif>
Browse_Graphic_File_Description: gif image file
Browse_Graphic_File_Type: gif
Native_Data_Set_Environment:
TIFF image compressed into MrSID image


Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
During photographic reproduction of the source photography, limited analog dodging is performed to improve image quality. Analog dodging consists of holding back light from certain areas of the sensitized photographic material to avoid overexposure. The diapositive is inspected to insure clarity and radiometric uniformity. Diapositive image brightness values are collected with a minimum of image quality manipulation. Image brightness values may deviate from brightness values of the original imagery due to image value interpolation during the scanning and rectification processes. Radiometry is verified by visual inspection of the digital orthophoto quadrangle with the original unrectified image to determine if the digital orthophoto has the same or better image quality as the original unrectified input image. Slight systematic radiometric differences can be detected between adjacent DOQ files due primarily to differences in source photography capture dates and sun angles of aerial photography along flight lines. These differences can be observed in an image's general lightness or darkness when compared to adjacent DOQ file coverages
Logical_Consistency_Report: Not Applicable
Completeness_Report:
All DOQ imagery is visually inspected for completeness to ensure that no gaps or image misplacement exist in the 3.75' image area. DOQ images may be derived by mosaicking multiple source images, in order to insure complete coverage. All DOQ's are cloud free within the 3.75' image area. Source photography is leaf-off in deciduous vegetation regions.
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
Refer to the USGS website <URL:http://www.usgs.gov> for information about horizontal positional accuracy. 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 USGS website <URL:http://www.usgs.gov> for information about vertical positional accuracy. 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
Publication_Date: Unknown
Title: Digital Elevation Model
Geospatial_Data_Presentation_Form: map
Publication_Information:
Publication_Place: Reston, VA
Publisher: US Geological Survey
Type_of_Source_Media: cartridge tape
Source_Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 19880805
Ending_Date: Present
Source_Currentness_Reference: ground condition
Source_Citation_Abbreviation: DEM1
Source_Contribution:
Elevation data in the form of an ortho-DEM regridded to user-specified intervals and bounds.
Source_Information:
Source_Citation:
Citation_Information:
Originator: US Geological Survey
Publication_Date: Unknown
Title: Photo ID number
Geospatial_Data_Presentation_Form: remote-sensing image
Publication_Information:
Publication_Place: Reston, VA
Publisher: US Geological Survey
Source_Scale_Denominator: 40000
Type_of_Source_Media: cartridge tape
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 051292
Source_Currentness_Reference: ground condition
Source_Citation_Abbreviation: PHOTO1
Source_Contribution:
Panchromatic black and white (or color infrared) NAPP or NAPP-like photograph. NAPP photographs are centered on the DOQ coverage area.
Source_Information:
Source_Citation:
Citation_Information:
Originator: US Geological Survey
Publication_Date: Unpublished material
Title: project ground and photo control
Geospatial_Data_Presentation_Form: remote-sensing image
Publication_Information:
Publication_Place: Reston, VA
Publisher: US Geological Survey
Type_of_Source_Media: various media
Source_Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: Unknown
Ending_Date: Present
Source_Currentness_Reference: ground condition
Source_Citation_Abbreviation: CONTROL_INPUT
Source_Contribution:
Horizontal and vertical control used to establish positions and elevations for reference and correlation purposes.
Source_Information:
Source_Citation:
Citation_Information:
Originator: US Geological Survey
Publication_Date: Unpublished material
Title: Report of Calibration
Geospatial_Data_Presentation_Form: remote-sensing image
Publication_Information:
Publication_Place: Reston, VA
Publisher: US Geological Survey
Type_of_Source_Media: disc, paper
Source_Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: Unknown
Ending_Date: Present
Source_Currentness_Reference:
Date of the camera calibration associated with the source photography.
Source_Citation_Abbreviation: CAMERA_INPUT
Source_Contribution: Camera calibration parameters.
Source_Information:
Source_Citation:
Citation_Information:
Originator: US Geological Survey
Publication_Date: Unknown
Title: Digital Orthophoto Quarterquads
Edition: 1
Geospatial_Data_Presentation_Form: map
Publication_Information:
Publication_Place: Reston, VA
Publisher: US Geological Survey
Source_Scale_Denominator: 12000
Type_of_Source_Media: CD-ROM
Source_Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: Unknown
Ending_Date: Present
Source_Currentness_Reference: Publication Date
Source_Citation_Abbreviation: USGSDOQ
Source_Contribution: DOQ's in standard USGS referencing system in TIFF format.
Source_Information:
Source_Citation:
Citation_Information:
Originator: Complex Systems Research Center
Publication_Date: Unknown
Title: Quarter Quad Boundaries
Edition: 1
Geospatial_Data_Presentation_Form: map
Publication_Information:
Publication_Place: Durham, NH
Publisher: Complex Systems Research Center, UNH
Source_Scale_Denominator: 12000
Type_of_Source_Media: digital
Source_Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: Unknown
Ending_Date: Present
Source_Currentness_Reference: Publication Date
Source_Citation_Abbreviation: QQBOUNDS
Source_Contribution: USGS quarter-quad boundaries
Process_Step:
Process_Description:
The production procedures, instrumentation, hardware and software used in the collection of standard USGS DOQ's vary depending on systems used at the contract, cooperator or USGS production sites. The majority of DOQ datasets are acquired through government contract. The process step describes, in general, the process used in the production of standard USGS DOQ data sets.

The rectification process requires, as input, a user parameter file to control the rectification process, a digital elevation model (DEM1) gridded to user specified bounds, projection, zone, datum and X-Y units, a scanned digital image file (PHOTO1) covering the same area as the DEM, ground X-Y-Z point values (CONTROL_INPUT) and their conjugate photo coordinates in the camera coordinate system, and measurements of the fiducial marks (CAMERA_INPUT) in the digitized image.

The camera calibration report (CAMERA_INPUT) provides the focal length of the camera and the distances in millimeters from the camera's optical center to the camera's 8 fiducial marks. These marks define the frame of reference for spatial measurements made from the photograph. Ground control points (CONTROL_INPUT) acquired from ground surveys or developed in aerotriangulation, are third order class 1 or better, and meet National Map Accuracy Standard (NMAS) for 1:12,000-scale. Ground control points are in the Universal Transverse Mercator or the State Plane Coordinate System on NAD83. Horizontal and vertical residuals of aerotriangulated tie-points are equal to or less than 2.5 meters. Standard aerotriangulation passpoint configuration consists of 9 ground control points, one near each corner, one at the center near each side and 1 near the center of the photograph, are used. The conjugate positions of the ground control points on the photograph are measured and recorded in camera coordinates.

The raster image file (PHOTO_1) is created by scanning an aerial photograph film diapositive with a precision image scanner. An aperture of approximately 25 to 32 microns is used, with an aperture no greater than 32 microns permitted. Using 1:40,000-scale photographs, a 25-micron scan aperture equates to a ground resolution of 1-meter. The scanner converts the photographic image densities to gray scale values ranging from 0 to 255 for black and white photographs. Scan files with ground resolution less than 1 meter or greater than 1 meter but less than 1.28 meters are resampled to 1 meter.

The principal elevation data source (DEM1) are standard DEM datasets from the National Digital Cartographic Data Base (NDCDB). DEM's that meet USGS standards are also produced by contractors to fulfill DOQ production requirements and are subsequently archived in the NDCDB. All DEM data is equivalent to or better than USGS DEM standard level 1. The DEM used in the production of DOQ's generally has a 30-meter grid post spacing and possesses a vertical RMSE of 7-meters or less. A DEM covering the extent of the photograph is used for the rectification. The DEM is traversed from user-selected minimum to maximum X-Y values and the DEM X-Y-Z values are used to find pixel coordinates in the digitized photograph using transformations mentioned above. For each raster image cell subdivision, a brightness or gray-scale value is obtained using nearest neighbor, bilinear, or cubic convolution resampling of the scanned image. The pixel processing algorithm is indicated in the header file . An inverse transformation relates the image coordinates referenced to the fiducial coordinate space back to scanner coordinate space. For those areas for which a 7.5-minute DEM is unavailable and relief differences are less than 150 feet, a planar-DEM (slope-plane substitute grid) may be used.

Rectification Process: The photo control points and focal length are iteratively fitted to their conjugate ground control points using a single photo space resection equation. From this mathematical fit is obtained a rotation matrix of constants about the three axes of the camera. This rotation matrix can then be used to find the photograph or camera coordinates of any other ground X-Y-Z point. Next a two dimensional fit is made between the measured fiducial marks on the digitized photograph and their conjugate camera coordinates. Transformation constants are developed from the fit and the camera or photo coordinates are used in reverse to find their conjugate pixel coordiates on the digitized photograph.

Quality Control: All data is inspected according to a quality control plan. DOQ contractors must meet DOQ standards for attribute accuracy, logical consistency, and data completeness.

Once acquired by Complex Systems Research Center, the USGSDOQs are processed as follows: - Convert image to grid (ARC/INFO imagegrid) - Project grid from UTM meters (zone 18, or 19), NAD83 to NH State Plane feet (Zone 4676), NAD83 - Clip the projected grid to quarter-quad boundaries using QQBOUNDS, thereby eliminating any overlap in the image areas. - Convert grid to TIFF image (ARC/INFO gridimage with no compression) - Convert TIFF image to geo-referenced MrSID with 1:20 encoding ratio

Process_Date: 20001101
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


Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method: Raster


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: 300000.000000
False_Northing: 0.000000
Planar_Coordinate_Information:
Planar_Coordinate_Encoding_Method: Row and column
Coordinate_Representation:
Abscissa_Resolution: 3.28
Ordinate_Resolution: 3.28
Planar_Distance_Units: Feet
Geodetic_Model:
Horizontal_Datum_Name: North American Datum of 1983
Ellipsoid_Name: GRS 80
Semi-major_Axis: 6378137.0000000
Denominator_of_Flattening_Ratio: 298.26


Entity_and_Attribute_Information:
Overview_Description:
Entity_and_Attribute_Overview:
For DOQ's from panchromatic sources, each pixel contains an 8-bit gray-scale value between 0-255. A value of 0 represents the color black while a value of 255 represents the color white. All values between 0 and 255 are represented as a shade of gray varying from black to white.
Entity_and_Attribute_Detail_Citation:
U.S. Department of the Interior, U.S. Geological Survey, 1992, Standards for digital orthophotos: Reston, VA. A hypertext version is available at <URL:ftp://www-nmd.usgs.gov/pub/doq_html/standards_doq.html>


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: 92doq157sw - 1992 Digital Orthophoto Quadrangle for Quad 157SW
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: MrSID
Transfer_Size: 2.5 MB (quarter quad tile)
Digital_Transfer_Option:
Offline_Option:
Offline_Media: CD-ROM
Recording_Format: MrSID
Compatibility_Information:
Requires MrSID extension in Arc8.x or ArcView 3.x. For non-ESRI users, a free MrSID viewer may be downloaded from URL:<http://www.lizardtech.com>
Fees:
No charge when downloaded through the Internet. Statewide DOQ's are also available on pre-packaged CD/ROMs for $200 (4 CD set). The fee for custom orders on CD/ROM is $100/CD.
Ordering_Instructions:
Email GRANIT (granit.sr.unh.edu) or order from web site (www.granit.sr.unh.edu)


Metadata_Reference_Information:
Metadata_Date: 20020911
Metadata_Review_Date: 20020911
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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