Scott County, IA 1:4800 1.0' Pixel Color Orthophotography (2005)

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Metadata:

Identification_Information:
Citation:
Citation_Information:
Originator: Kucera International Inc.
Publication_Date: Unknown
Title:
Scott County, IA 1:4800 1.0' Pixel Color Orthophotography (2005)
Edition: 1.0
Geospatial_Data_Presentation_Form: Remote-sensing image
Publication_Information:
Publication_Place: Davenport, IA
Publisher: Scott County, IA
Description:
Abstract:
This metadata record describes the 400 scale 1.0' pixel natural color orthophotography produced in 2005 by Kucera International Inc. for Scott County, IA. The bounding coordinates are for all imagery of this scale within the project area, not an individual image tile.
Purpose:
An orthophoto is a geometrically accurate photographic record of landscape conditions at the time of the corresponding aerial photography. As such, the orthophoto is useful for a variety of applications, such as environmental monitoring, facility engineering/maintenance, city/county planning, property line review, etc. It can be used alone or as a raster basemap for corresponding vector line mapping.
Supplemental_Information:
Project performed in conjunction with multi-county, multi-city aerial base mapping of IA-IL Bi-State Commission Region.
Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 200504
Currentness_Reference: Ground condition
Status:
Progress: Complete
Maintenance_and_Update_Frequency: Unknown
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -90.926290
East_Bounding_Coordinate: -90.743691
North_Bounding_Coordinate: 41.783784
South_Bounding_Coordinate: 41.437030
Keywords:
Theme:
Theme_Keyword_Thesaurus: KI Thesaurus
Theme_Keyword: Aerial imagery
Theme_Keyword: Aerial photograph
Theme_Keyword: Basemap
Theme_Keyword: Digital orthophoto
Theme_Keyword: Othophoto
Place:
Place_Keyword_Thesaurus: GNIS
Place_Keyword: Allens Grove
Place_Keyword: Ames Creek
Place_Keyword: Barber Creek
Place_Keyword: Bettendorf
Place_Keyword: Big Elkhorn Creek
Place_Keyword: Black Hawk Creek
Place_Keyword: Blue Grass
Place_Keyword: Bud Creek
Place_Keyword: Buffalo
Place_Keyword: Butler
Place_Keyword: Cleona
Place_Keyword: Coal Creek
Place_Keyword: Cody
Place_Keyword: Crow Creek
Place_Keyword: Davenport
Place_Keyword: Dixon
Place_Keyword: Donahue
Place_Keyword: Duck Creek
Place_Keyword: Durant
Place_Keyword: Eldridge
Place_Keyword: Fancy Creek
Place_Keyword: Glynn Creek
Place_Keyword: Goose Creek
Place_Keyword: Hickory Creek
Place_Keyword: Hickory Grove
Place_Keyword: Hills Creek
Place_Keyword: Kickapoo Slough
Place_Keyword: LeClaire
Place_Keyword: Liberty
Place_Keyword: Lincoln
Place_Keyword: Long Grove
Place_Keyword: Lost Creek
Place_Keyword: Lost Grove Lake
Place_Keyword: Martin Creek
Place_Keyword: Mason Creek
Place_Keyword: Maysville
Place_Keyword: McCarty Creek
Place_Keyword: McCausland
Place_Keyword: McDonald Creek
Place_Keyword: Mississippi River
Place_Keyword: Mud Creek
Place_Keyword: New Liberty
Place_Keyword: Panorama Park
Place_Keyword: Pigeon Creek
Place_Keyword: Pleasant Valley
Place_Keyword: Princeton
Place_Keyword: Riverdale
Place_Keyword: Rock Creek
Place_Keyword: Sheridan
Place_Keyword: Silver Creek
Place_Keyword: Sodus Creek
Place_Keyword: Spencer Creek
Place_Keyword: Sugar Creek
Place_Keyword: Turkey Hollow Creek
Place_Keyword: Utica Creek
Place_Keyword: Walcott
Place_Keyword: Walnut Creek
Place_Keyword: Wapsipinicon River
Place_Keyword: West Lake
Place_Keyword: Winfield
Access_Constraints: None
Use_Constraints: None
Point_of_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Ray Weiser
Contact_Organization: Scott County GIS
Contact_Position: GIS Coordinator
Contact_Address:
Address_Type: mailing and physical
Address: 600 W 4th St
City: Davenport
State_or_Province: IA
Postal_Code: 52801
Country: U.S.
Contact_Voice_Telephone: 563-328-4137
Contact_Facsimile_Telephone: 653-326-8669
Contact_Electronic_Mail_Address: gis@scottcountyiowa.com
Hours_of_Service: 0800-1630 CST
Data_Quality_Information:
Logical_Consistency_Report:
Compliance with the accuracy standard was ensured by the placement of GPS ground control prior to the acquisition of aerial imagery. The following checks were performed:
1. The airborne GPS/INS data stream was validated and solved in forward and reverse using Applanix's POSPAC software. The control and imagery were validated in the aerotriangulation bundle adjustment process using Inpho's MatchAT software. The residuals of the adjustment met the required standards with the results fully outlined in an AT report supplied to Scott County.
2. Digital orthophotography was validated through a visual inspection of control points, edge matching and general image quality.
Completeness_Report:
The following methods were used to ensure image quality:
1. Use of targeted ground control during image acquisition.
2. Use of GPS/INS during image acquisition.
3. Checking of controls against ortho product.
4. Post ortho accuracy approval checks for overall image quality (tone, color balance, etc.).
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
This image complies with NSSDA standards. It has been tested at 95% confidence level at 400 scale to have an RMS horizontal positional displacement within 12 feet of well defined ground features in obscured areas. Does not apply to vertical surface features, such as structures, appearing in the digital orthophotography due to inherent lean. Tested horizontal RMSE on controls within the project area is 3.1 feet.
Vertical_Positional_Accuracy:
Vertical_Positional_Accuracy_Report: There is no vertical component for orthos.
Lineage:
Source_Information:
Source_Citation:
Citation_Information:
Originator: Kucera International Inc.
Publication_Date: Unpublished material
Title: Aerial photography
Edition: 1.0
Geospatial_Data_Presentation_Form: Remote-sensing image
Publication_Information:
Publication_Place: None
Publisher: None
Source_Scale_Denominator: 21600
Type_of_Source_Media: film
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 200504
Source_Currentness_Reference: Ground condition
Source_Citation_Abbreviation: IMG
Source_Contribution:
Film based aerial images are scanned to for use in AT, map compilation and ortho production.
Source_Information:
Source_Citation:
Citation_Information:
Originator: Dan Corbin Inc.
Publication_Date: Unpublished material
Title: Ground control
Edition: 1.0
Geospatial_Data_Presentation_Form: Vector digital data
Publication_Information:
Publication_Place: None
Publisher: None
Type_of_Source_Media: disc
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 2005
Source_Currentness_Reference: Ground condition
Source_Citation_Abbreviation: CONT
Source_Contribution:
Targeted ground control is used to create a digital control file and control report as well as QC check of ortho accuracy. Predefined points (usually NGS) within the county are targeted, making the points visible in the photography. These points along with their precise coordinates are used in the AT process and to check the horizontal accuracy of the resulting orthophotos.
Source_Information:
Source_Citation:
Citation_Information:
Originator: Kucera International Inc.
Publication_Date: Unpublished material
Title: Digital elevation model
Edition: 1.0
Geospatial_Data_Presentation_Form: Vector digital data
Publication_Information:
Publication_Place: None
Publisher: None
Source_Scale_Denominator: 21600
Type_of_Source_Media: disc
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 2005
Source_Currentness_Reference: Ground condition
Source_Citation_Abbreviation: DEM
Source_Contribution:
The DEM was comprised of newly acquired LiDAR point data supplemented with breaklines compiled from 21600 neg imagery.
Source_Information:
Source_Citation:
Citation_Information:
Originator: Bi-State Regional Commission
Publication_Date: Unknown
Title: Tile definition
Edition: 1.0
Geospatial_Data_Presentation_Form: Vector digital data
Publication_Information:
Publication_Place: Unknown
Publisher: Unknown
Type_of_Source_Media: disc
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 2005
Source_Currentness_Reference: Ground condition
Source_Citation_Abbreviation: TLDEF
Source_Contribution:
The tile definition contains the name and bounding coordinates for each tile in the image index and is used to cut orthorectified imagery into manageable, usable images. Each tile is 6000 X 6000 feet. It was provided to Kucera by Bi-State Regional Commission in vector format and references Iowa South State Plane coordinates. Kucera converted to an ASCII text file for use in image processing software.
Source_Information:
Source_Citation:
Citation_Information:
Originator: Kucera International Inc.
Publication_Date: Unpublished material
Title: Orthorectified imagery
Edition: 1.0
Geospatial_Data_Presentation_Form: Remote-sensing image
Publication_Information:
Publication_Place: None
Publisher: None
Source_Scale_Denominator: 4800
Type_of_Source_Media: disc
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 2005
Source_Currentness_Reference: Ground condition
Source_Citation_Abbreviation: OIMG1
Source_Contribution:
This first level of orthorectified images results from using the AT solution and the DEM to create an orthophoto from each scanned exposure.
Source_Information:
Source_Citation:
Citation_Information:
Originator: Kucera International Inc.
Publication_Date: Unpublished material
Title: Tiled Orthophoto
Edition: 1.0
Geospatial_Data_Presentation_Form: Remote-sensing image
Publication_Information:
Publication_Place: None
Publisher: None
Source_Scale_Denominator: 4800
Type_of_Source_Media: disc, DVD or online
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 2005
Source_Currentness_Reference: Ground condition
Source_Citation_Abbreviation: OIMG2
Source_Contribution:
The tiled orthophoto is the result of mosaicking orthorectified imagery and using the tile definition to cut into manageable, usable orthophotos.
Process_Step:
Process_Description:
At selected locations throughout the site, accurate GPS coordinates and elevations are surveyed and the points are marked with targets which will be visible in the aerial photography.
Source_Used_Citation_Abbreviation: None
Process_Date: 2005
Source_Produced_Citation_Abbreviation: CONT
Process_Step:
Process_Description:
New color aerial photography of the site is acquired using USGS calibrated/approved aerial camera systems mounted in twin-engine aircrafts. Film type used was AGFA Color X100. Camera information:

1. Zeiss RMK Top 15, serial no. 142832, focal length of 153.850mm, AWAR 101, last calibrated in June 2003.
2. Zeiss RMK Top 15, serial no. 145860, focal length of 152.483mm, AWAR 101, last calibrated in Sept. 2003.

During the aerial photography, the XYZ position of the camera center (principal point) and angular orientation of the aerial camera at the instant of each exposure is accurately measured using an airborne GPS/IMU system interfaced with the aerial camera. GPS base-station receivers are operated on the ground over known site points during the flyover to provide data necessary to reference the aerial camera position and orientation measurements to the terrain coordinate system.
Source_Used_Citation_Abbreviation: None
Process_Date: 200504
Source_Produced_Citation_Abbreviation: IMG
Process_Step:
Process_Description:
The aerial photography is processed, checked, titled, and scanned. Scanning was in direct negative form in a single pass on Z/I Imaging PhotoScan 2000 system. Scanning resolution used was 14 microns (1800dpi).
Source_Used_Citation_Abbreviation: IMG
Process_Date: 2005
Source_Produced_Citation_Abbreviation: IMG
Process_Step:
Process_Description:
The airborne GPS/IMU data is processed, in both forward and reverse directions, together with the simultaneously recorded ground-based GPS base station data to determine the aerial camera position and orientation in the terrain (project) coordinate datum during image collection.
Source_Used_Citation_Abbreviation: None
Process_Date: 2005
Source_Produced_Citation_Abbreviation: None
Process_Step:
Process_Description:
Using the processed GPS/IMU data and correctly oriented imagery, a bundle adjustment is computed (AT) in Inpho's Match AT software.
Source_Used_Citation_Abbreviation: IMG, CONT
Process_Date: 2005
Source_Produced_Citation_Abbreviation: None
Process_Step:
Process_Description:
The scanned digital photo imagery for each exposure is directly oriented on digital orthophoto production stations using the AT bundle adjustment and rectified to digital elevation model data. Image rectification was performed using Inpho Orthomaster.
Source_Used_Citation_Abbreviation: IMG, DEM
Process_Date: 2005
Source_Produced_Citation_Abbreviation: OIMG1
Process_Step:
Process_Description:
Using automatic image processing software, blocks of rectified digital images are mosaicked together, radiometrically adjusted (tone balanced) across the images to achieve a generally seamless appearance, and cut into individual tiled images. The processing was completed using Stellacore Orthovista.
Source_Used_Citation_Abbreviation: OIMG1, TILEDEF
Process_Date: 2005
Source_Produced_Citation_Abbreviation: OIMG2
Process_Step:
Process_Description:
The individual final tiled images are subject to manual QC review, including feature representation, edge match, radiometry, and geometric accuracy. Positions of targeted ground points observable in the imagery are compared against their surveyed coordinate positions as a geometric accuracy check.
Source_Used_Citation_Abbreviation: OIMG2
Process_Date: 2005
Source_Produced_Citation_Abbreviation: OIMG2
Process_Step:
Process_Description:
Back-up copies of raw scanned and rectified imagery are maintained.
Source_Used_Citation_Abbreviation: OIMG2
Process_Date: 2005
Source_Produced_Citation_Abbreviation: OIMG2
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: 1402 Iowa South
Lambert_Conformal_Conic:
Standard_Parallel: 40.616667 (N)
Standard_Parallel: 41.783333 (S)
Longitude_of_Central_Meridian: -93.500000
Latitude_of_Projection_Origin: 40.000000
False_Easting: 1640416.666500
False_Northing: 0.000000
Planar_Coordinate_Information:
Planar_Coordinate_Encoding_Method: Coordinate pair
Coordinate_Representation:
Abscissa_Resolution: 1.0'
Ordinate_Resolution: 1.0'
Planar_Distance_Units: US Feet
Geodetic_Model:
Horizontal_Datum_Name: North American Datum of 1983
Ellipsoid_Name: Geodetic Reference System 80
Semi-major_Axis: 6378137.000000
Denominator_of_Flattening_Ratio: 298.25722210088
Vertical_Coordinate_System_Definition:
Altitude_System_Definition:
Altitude_Datum_Name: North American Vertical Datum of 1988
Altitude_Resolution: 1.0'
Altitude_Distance_Units: US Feet
Altitude_Encoding_Method: Implicit coordinate
Entity_and_Attribute_Information:
Overview_Description:
Entity_and_Attribute_Overview:
Color orthophotos are comprised of pixels. Each pixel is assigned a value of 0 to 255. That number will refer to a color look-up table which contains red, green and blue (RGB) values, each from 0 to 255, for that pixel within the image.
Entity_and_Attribute_Detail_Citation: None
Distribution_Information:
Distributor:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Ray Weiser
Contact_Organization: Scott County GIS
Contact_Position: GIS Coordinator
Contact_Address:
Address_Type: mailing and physical
Address: 600 W 4th St
City: Davenport
State_or_Province: IA
Postal_Code: 52801
Country: U.S.
Contact_Voice_Telephone: 563-328-4137
Contact_Facsimile_Telephone: 653-326-8669
Contact_Electronic_Mail_Address: gis@scottcountyiowa.com
Hours_of_Service: 0800-1630 CST
Resource_Description:
Scott County, IA 1:4800 1.0' Pixel Color Orthophotography (2005)
Distribution_Liability:
Scott County provides the geographic data "as is". This organization makes no guarantee or warranty concerning the accuracy of information contained in the geographic data. Also, this organization makes no warranty, either expressed or implied, regarding the condition of the product or its fitness for any particular purpose. The burden for determining fitness for use lies entirely with the user. Although these files have been processed successfully on computers at this organization, no warranty is made by this organization regarding the use of these data on any other system, nor does the fact of distribution constitute or imply such a warranty.
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name:
TIFF, SID (for orthophotos). ASCII text, ESRI SHP, AutoCAD DWG, Arcgenerate LIN (for elevation data, e.g. LiDAR, DEM, DTM).
Digital_Transfer_Option:
Offline_Option:
Offline_Media: CDROM, DVD, HD
Recording_Format: Unknown
Fees:
TBD. Data is currently offered for free and/or minimal time and materials charge depending on request.
Ordering_Instructions:
Please send media with return postage and contact the Distribution Contact person identified to process your data request.
Custom_Order_Process: Unknown
Technical_Prerequisites: Unknown
Available_Time_Period:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: Unknown
Metadata_Reference_Information:
Metadata_Date: 20070622
Metadata_Review_Date: 20070622
Metadata_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Ray Weiser
Contact_Organization: Scott County GIS
Contact_Position: GIS Coordinator
Contact_Address:
Address_Type: mailing and physical
Address: 600 W 4th St
City: Davenport
State_or_Province: IA
Postal_Code: 52801
Country: US
Contact_Voice_Telephone: 563-328-4137
Contact_Facsimile_Telephone: 653-326-8669
Contact_Electronic_Mail_Address: gis@scottcountyiowa.com
Hours_of_Service: 0800-1630 CST
Metadata_Standard_Name: FGDC CSDGM
Metadata_Standard_Version: FGDC-STD-001-1998
Generated by mp version 2.9.1 on Tue Aug 14 12:54:02 2007