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Illinois Project T.O. 029

Identification Information
Citation
Originator
Surdex Corporation and Science Applications International Corporation (SAIC)
Publication Date
2006
Title
Illinois Project T.O. 029
Geospatial Data Presentation Form
Remote-sensing image
Publication Information
Publication Place
Sioux Falls, SD
Publisher
U.S. Geological Survey
Abstract
A 0.5 meter resolution panchromatic (B and W) USGS Digital Orthophoto Quarter-quadrangle (DOQQ) A DOQQ is a raster image in which displacement in the image caused by sensor orientation and terrain relief has been removed. A DOQQ combines the image characteristics of a photograph with the geometric qualities of a map. The geographic extent of the DOQQ is equivalent to a quarter of a 7.5-minute map (3.75 minutes of latitude and longitude) with overedge . The overedge ranges from a minimum of 50 meters to 300 meters beyond the extremes of the primary and secondary corner ticks. DOQQs are produced with a 1-meter ground sample distance (GSD) and are cast on the Universal Transverse Mercator (UTM) projection on the North American Datum of 1983 (NAD83). Primary (solid) and secondary (dashed) corner ticks are burned into the image to indicate the geographic corners of the DOQQ. The primary ticks always show the NAD83 corners. The secondary ticks show either the NAD27 or the local horizontal datum in use in a specific area (e.g. the Puerto Rico datum, the Hawaiian datum). Each DOQQ is produced to meet a National Map Accuracy Standard (NMAS) for 1:12000 scale maps (10.16 meters radial error at a 90% probability). Each DOQQ is formatted with a variable length ASCII header followed by a series of 8- bit image data lines. The ASCII header is padded to equal the length of one image line. The header contains information on file organization, display (samples and lines), georeferencing, and production sources. The file structure for a native format DOQQ is analogous to a raw raster BIL (panchromatic) or BIP (RGB color). DOQQs are nominally produced from National Aerial Photography Program (NAPP) source imagery flown at 20,000 feet above average ground using a single source image for each DOQQ. NAPP imagery is flown leaf-off in deciduous vegetation regions.
Purpose
This data depicts geographic features on the surface of the earth. DOQQs serve a variety of purposes, from interim base maps to field references for earth science investigations and analysis. The DOQQ is useful as a layer in a geographic information system (GIS) and as a tool for performing digital map revision. DOQQs form the medium-resolution image base for The National Map.
Temporal Extent
Currentness Reference
Ground Condition
Time Period
Beginning
20050218
End
20050504
Theme Keyword
0.5-meter orthophoto
Digital orthophoto
Digital orthophoto quarterquad
Orthophoto
Rectified photograph
Rectified image
Quarterquadrangle orthophoto
DOQQ
3.75- x 3.75-minute orthophoto
Theme Keyword Thesaurus
None
Place Keyword
US
IL
Project Level Metadata
Place Keyword Thesaurus
None
Temporal Keyword
Access Restrictions
None
Use Restrictions
None. However, users should be aware that temporal changes may have occurred since this data set was collected and that some parts of this data may no longer represent actual surface conditions. Users should not use this data for critical applications without a full awareness of it's limitations. Acknowledgment of the U.S. Geological Survey would be appreciated for products derived from these data.
Status
Complete
Maintenance and Update Frequency
Unknown.
Point of Contact
Contact Person
Tim Bohn
Delivery Point
520 Spirit of St. Louis Blvd.
City
Chesterfield
State
MO
Postal Code
63005
Contact Telephone
1-636-532-3427
Contact Facsimile Telephone
1-636-537-9638
Contact Electronic Mail Address
timb@surdex.com
Hours of Service
Monday through Friday 8:00 AM to 5:00 PM (EasternTime)
Credit
Surdex Corporation and Science Application International Corporation (SAIC)
Native Data Set Environment
LH Systems DSW700 Film Scanners, Surdex SurDodge Software, Intergraph's ISAT v04.04.17, Surdex Snoop tool, Surdex DOQQDB Production Software, Surdex developed orthorectification software, Inpho Orthovista software v4.0, Windows 2000 and Windows XP Operating System. SAIC QVerify V0.1 Software, SAIC QSideview V0.1., SUNW Ultra-4, Solaris OS V5.9
Data Quality Information
Attribute Accuracy Report
The digital dodging software developed by Surdex is used to counter the effects of haze and sun angle illumination on the film photography. This procedure has been proven to provide a distinct advantage in minimizing the need for extensive radiometric balancing and improves automatic pass/tie point collection during the aerotriangulation phase. The net affect of this program is to drive the source image closer to a histogram with a nearly Gaussian distribution. The output of this program will always produce an image with full dynamic range, nearly regardless of the source image. Minimal radiometric balancing was achieved using Inpho's Ortho Vista software.
Logical Consistency Report
All DOQQ header data and image file sizes are validated using USGS software before being archived. This validation process ensures correct physical format and field values for header elements. Logical relationships between header elements are tested. Overlap regions between individual DOQQs are visually inspected for excessive horizontal displacement.
Completeness Report
DOQQ images are visually inspected for completeness to ensure that no gaps or image misplacements exist within the 3.75-minute image area or the overedge coverage. DOQQs can be derived by mosaicking multiple images to ensure complete coverage. and between adjacent images. DOQQs are nominally produced from National Aerial Photography Program (NAPP) source imagery flown at 20,000 feet above average ground using a single source image for each DOQQ. NAPP imagery is flown leaf-off in deciduous vegetation regions. Source imagery is nominally cloud free. Coastal areas and international boundary regions may have areas without images (void areas) in parts of the coverage. These void areas have a radiometric value of either zero (black) or 128 (uniform gray). DOQQs nominally are produced with overedge coverage. This coverage is variable and may range from a minimum of 50 meters to a maximum of 300 meters beyond the extremes of the primary or secondary corners. The resulting DOQQ is a rectangle whose size may vary in relation to adjoining DOQQs.
Horizontal Positional Accuracy Report
Random selection of 5% of the DOQQ tiles for excessive edge match offset.
Quantitative Horizontal Positional Accuracy Assessment
Lineage
Source
Originator
Surdex Corporation
Publication Date
2005
Title
NAPP
Geospatial Data Presentation Form
Remote-sensing image
Source Scale Denominator
40000
Type of Source Media
Stable-base material
Source Temporal Extent
Time Period Information
Range of Dates/Times
Beginning Date
20050218
Ending Date
20050504
Source Currentness Reference
Ground Condition
Contribution
Stable-base aerial photography acquired at 1:40,000 scale using only metric aerial cameras with USGS calibration certificates. Provides the imagery for the digital orthoimage. Film is panchromatic.
Source
Originator
U.S. Geological Survey
Publication Date
2003
Title
USGS 1-arcsec NED
Type of Source Media
Hard Drive
Source Temporal Extent
Time Period Information
Range of Dates/Times
Beginning Date
1929
Ending Date
1998
Source Currentness Reference
Ground condition
Contribution
USGS 1-arcsec National Elevation Dataset for the entire United States that was broken down into 1 degree cells.
Source
Originator
Surdex Corporation
Publication Date
2005
Title
Project Photo Control
Type of Source Media
CD-ROM
Source Temporal Extent
Time Period Information
Range of Dates/Times
Beginning Date
20050218
Ending Date
20050504
Source Currentness Reference
Ground condition
Contribution
Horizontal and vertical control used to establish positions and elevations for reference and correlation purposes and as input to the aerotriangulation process. Control consists of both Airborne GPS to provide camera station positions and photoidentifiable surveyed ground control for ground reference.
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
Universal Transverse Mercator
Universal Transverse Mercator
UTM Zone Number
16
Transverse Mercator
Scale Factor at Central Meridian
0.9996
Longitude of Central Meridian
-87.0
Latitude of Projection Origin
0.0
False Easting
500000
False Northing
0.0
Planar Coordinate Information
Planar Coordinate Encoding Method
Row and column
Coordinate Representation
Abscissa Resolution
0.5
Ordinate Resolution
0.5
Planar Distance Units
meters
Geodetic Model
Horizontal Datum Name
North American Datum of 1983
Ellipsoid Name
Geodetic Reference System 80
Semi-major Axis
6378137
Denominator of Flattening Ratio
298.5722210
Entity and Attribute Information
Entity and Attribute Overview
Panchromatic orthoimagery is organized in a single channel. Each pixel is assigned a gray-scale value from 0-255 with 0 representing black and 255 representing white. Areas where data is incomplete due to lack of full image coverage are represented with the numeric value of 0 or 128.
Entity and Attribute Detail Citation
U.S. Department of the Interior, U.S. Geological Survey, 1996, Standards for Digital Orthophotos: Reston, VA.
Metadata Reference Information
Metadata Date
20060822
Metadata Contact
Contact Information
Contact Person Primary
Contact Person
Contact Organization
Science Applications International Corporation (SAIC)
Contact Position
Site Manager - SAIC Melbourne Office
Contact Address
Address
100 Rialto Place, Suite 200
City
Melbourne
State or Province
FL
Postal Code
32901
Country
US
Contact Voice Telephone
1-321-751-3235
Contact Facsimile Telephone
1-321-757-7870
Contact Electronic Mail Address
zuzekj@saic.com
Hours of Service
Monday through Friday 8:00 AM to 5:00 PM (EasternTime)
Contact Instructions
The above is the contact information for SAIC in Melbourne, FL
Metadata Standard Name
FGDC Content Standard for Digital Geospatial Metadata
Metadata Standard Version
FGDC-STD-001-1998
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