Scott County, IA 1:1200 Digital Color Orthophotography 2009

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Metadata:

Identification_Information:
Citation:
Citation_Information:
Originator: Scott County, IA
Publication_Date: 2009
Title: Scott County, IA 1:1200 Digital Color Orthophotography 2009
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 digital orthophotos produced for Scott County, IA in 2009. This 1:1200 scale orthophotography is comprised of natural color digital images collected with a GSD (Ground Sample Distance) of 0.4'. Imagery was collected using Leica ADS40 digital sensors.
Purpose:
A digital orthophoto is a geometrically accurate photographic record of landscape conditions at the time of the corresponding aerial photography. As such, the digital orthophoto is useful for a variety of applications, such as environmental monitoring, facility engineering/maintenance, city/county planning, property line review, etc. The digital orthophoto can be used alone or as a raster basemap for corresponding vector line mapping.
Supplemental_Information:
The four ADS40 bands record data in the following manner: Band 1 (blue)= 430-490nm; Band 2 (green)= 535-585nm; Band 3 (red)= 610-660nm; Band 4 (NIR)= 835-885nm.
Time_Period_of_Content:
Time_Period_Information:
Multiple_Dates/Times:
Single_Date/Time:
Calendar_Date: 20090408
Single_Date/Time:
Calendar_Date: 20090409
Single_Date/Time:
Calendar_Date: 20090411
Currentness_Reference: Ground condition
Status:
Progress: Complete
Maintenance_and_Update_Frequency: Unknown
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -90.91355510
East_Bounding_Coordinate: -90.30692883
North_Bounding_Coordinate: 41.78695175
South_Bounding_Coordinate: 41.43688267
Keywords:
Theme:
Theme_Keyword_Thesaurus: KI Thesaurus
Theme_Keyword: Aerial image
Theme_Keyword: ADS40
Theme_Keyword: Basemap
Theme_Keyword: Digital orthophoto
Theme_Keyword: Orthophoto
Place:
Place_Keyword_Thesaurus: GNIS
Place_Keyword: Iowa
Place_Keyword: Scott County
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
Address: 600 W 4th St
City: Davenport
State_or_Province: IA
Postal_Code: 52801-1004
Country: U.S.A.
Contact_Voice_Telephone: (563) 328-4137
Contact_Facsimile_Telephone: (563) 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 ground control and airborne GPS/INS data stream were validated through an aerotriangulation bundle adjustment using Leica's ORIMA and CAP-A software. 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:
Horizontal accuracy requirement is 1' RMSE, 3' @ 100% confidence. Horizontal RMSE tested 0.55 feet at the 95% confidence level. RMSE calculated in accordance with Geospatial Positioning Accuracy Standards Part 3: National Standard for Spatial Data Accuracy, FGDC-STD-007.3-1998.
Quantitative_Horizontal_Positional_Accuracy_Assessment:
Horizontal_Positional_Accuracy_Value: 0.55
Horizontal_Positional_Accuracy_Explanation:
RMSE values are calculated for ground control points based on quidelines established in FGDC-STD-007.3-1998 Geospatial Positioning Accuracy Standards Part3: National Standard for Spatial Data Accuracy. Measured x and y positions of the control in the final orthophoto are entered into an Excel spreadsheet along with the surveyed positions of the control points. RMSE_X and RMSE_Y are calculated and a subsequent horizontal RMSE derived for the dataset to meet 1' RMSE, 3' @ 100% confidence accuracy requirement.
Vertical_Positional_Accuracy:
Vertical_Positional_Accuracy_Report:
Orthophotography is a 2 dimensional representation of the earths surface and, therefore, has no vertical accuracy measure associated with it.
Lineage:
Source_Information:
Source_Citation:
Citation_Information:
Originator: Kucera International Inc.
Publication_Date: Unpublished material
Title: Digital aerial imagery.
Edition: 1.0
Geospatial_Data_Presentation_Form: Remote-sensing image
Publication_Information:
Publication_Place: None
Publisher: None
Source_Scale_Denominator: 8000
Type_of_Source_Media: disc
Source_Time_Period_of_Content:
Time_Period_Information:
Multiple_Dates/Times:
Single_Date/Time:
Calendar_Date: 20090408
Single_Date/Time:
Calendar_Date: 20090409
Single_Date/Time:
Calendar_Date: 20090411
Source_Currentness_Reference: Ground condition
Source_Citation_Abbreviation: IMG
Source_Contribution:
The aerial imagery was captured with Leica Geosystems ADS40 digital cameras, sensor head 104. The ADS40 uses a 'pushbroom' method of data collection with multiple CCDs using forward, rearward and nadir orientations along planned flight lines. Each collects data in one of the pan, red, green, blue or NIR spectral bands. This results in one image per CCD for each flight line. The aerial images are used for softcopy aerotriangulation of the project image strips and the production of orthophotos.
Source_Information:
Source_Citation:
Citation_Information:
Originator: Dan Corbin, Inc.
Publication_Date: 2009
Title: Ground control
Edition: 1.0
Geospatial_Data_Presentation_Form: tabular 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: 2009
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 project area are targeted, making the points visible in the photography. These points along with their precise coordinates are used in the aerotriangulation 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: Point 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: 20090317
Source_Currentness_Reference: Ground condition
Source_Citation_Abbreviation: DEM
Source_Contribution:
Lidar data was collected and classified to a bare earth digital elevation model for use in the orthorectification of the digital imagery.
Source_Information:
Source_Citation:
Citation_Information:
Originator: Kucera International, Inc.
Publication_Date: Unknown
Title: Tile definition
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: 2009
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. The tiles conform to the Scott County PLLS 1/4 section dimensions and numbering/naming system and are projected in the Iowa State Plane Coordinate system, south zone.
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: 1200
Type_of_Source_Media: disc
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 2009
Source_Currentness_Reference: Ground condition
Source_Citation_Abbreviation: OIMG1
Source_Contribution:
This first level of orthorectified images are the product of using the aerotriangulation solution and the DEM in GPRO. They are large, 4GB swaths that have yet to be mosaicked into manageable tiled orthos.
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: 1200
Type_of_Source_Media: disc, DVD or online
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 2009
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 are surveyed or monuments found and the points are marked with targets which will be visible in the aerial photography.
Source_Used_Citation_Abbreviation: None
Process_Date: 2009
Source_Produced_Citation_Abbreviation: CONT
Process_Step:
Process_Description:
New digital, color aerial imagery of the site is acquired using the Leica ADS40 camera. Airborne GPS/IMU data is recorded along with the imagery
Source_Used_Citation_Abbreviation: None
Process_Date:
20090408 20090409 20090411
Source_Produced_Citation_Abbreviation: IMG
Process_Step:
Process_Description:
Imagery and GPS/IMU data is downloaded from disc on the plane to disc on the ground. GPS/IMU mission data is processed together with simultaneously collected ground-based GPS base station data in forward and reverse directions. This precisely determines the aerial camera's position and orientation in the terrain (project) coordinate system and allows for correct orientation of the imagery.
Source_Used_Citation_Abbreviation: IMG
Process_Date: 2009
Source_Produced_Citation_Abbreviation: IMG
Process_Step:
Process_Description:
Using the processed GPS/IMU data and correctly oriented imagery, a bundle adjustment is computed (AT) in Leica Geosystems ORIMA/CAP-A software.
Source_Used_Citation_Abbreviation: IMG, CONT
Process_Date: 2009
Source_Produced_Citation_Abbreviation: AT
Process_Step:
Process_Description:
Orthorectified imagery is produced using Leica Geosystems GPRO software. They are large 4GB swaths that have yet to be mosaicked into manageable tiled orthos.
Source_Used_Citation_Abbreviation: IMG, DEM, AT
Process_Date: 2009
Source_Produced_Citation_Abbreviation: OIMG1
Process_Step:
Process_Description:
Orthorectified imagery is mosaicked, locally color-balanced and cut to the tile definition boundaries using Inpho Systems OrthoVista software. The tiled orthos are checked for accuracy against the surveyed ground control before further image editing.
Source_Used_Citation_Abbreviation: OIMG1, CONT, TLDEF
Process_Date: 2009
Source_Produced_Citation_Abbreviation: OIMG2
Process_Step:
Process_Description:
Tiled orthophotos then go through a rigorous manual QC process to evaluate for remaining hotspots (sun reflectance over water), tone quality, color balance and the feathering area between flight lines Any imperfections at this point are manually edited. If necessary, the tiled images are then converted to required format. All images are either recorded on DVD, transferred to HD or posted on FTP for client access.
Source_Used_Citation_Abbreviation: OIMG2
Process_Date: 2009
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
Lambert_Conformal_Conic:
Standard_Parallel: 40.61666667
Standard_Parallel: 41.78333333
Longitude_of_Central_Meridian: -93.50000000
Latitude_of_Projection_Origin: 40.00000000
False_Easting: 1640416.66666667
False_Northing: 0.000000
Planar_Coordinate_Information:
Planar_Coordinate_Encoding_Method: Coordinate pair
Coordinate_Representation:
Abscissa_Resolution: 0.4
Ordinate_Resolution: 0.4
Planar_Distance_Units: U.S. Survey Foot
Geodetic_Model:
Horizontal_Datum_Name: North American Datum of 1983 HARN 96
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 (GEOID03)
Altitude_Resolution: 0.5
Altitude_Distance_Units: U.S. Survey Foot
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
Address: 600 W 4th St
City: Davenport
State_or_Province: IA
Postal_Code: 52801-1004
Country: U.S.A.
Contact_Voice_Telephone: (563) 328-4137
Contact_Facsimile_Telephone: (563) 326-8669
Contact_Electronic_Mail_Address: gis@scottcountyiowa.com
Hours_of_Service: 0800-1630 CST
Resource_Description: 1:1200 Digital Color Orthophotography 2009
Distribution_Liability:
Scott County, IA 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:
MrSID (.sid), TIFF (.tig), JPEG (.jpg)and ArcGIS raster fGDB format.
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
<http://www.scottcountyiowa.com/it/gis_data.php?folder=data/Aerials/2009>
Access_Instructions:
Tiled JPG data available at URL above. Contact us for other delivery options or file formats.
Offline_Option:
Offline_Media: Hard drive
Recording_Format: ISO 9660
Fees:
Online: None Offline: See ordering instruction below.
Ordering_Instructions:
We find that most aerial requests can be handled via online download. However, if you require a countywide set of aerial tiles in JPG, online data transfer can be prohibitively large and time consuming. We also offer offline TIF format tiles and a mosaic in ArcGIS raster fGDB format. Our preferred method for transfer of countywide aerial data is by external hard drive. If you send an external hard drive with sufficient free space and prepaid return label, we can copy aerial data onto that and send back. For any other requests please contact us.
Available_Time_Period:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 2009
Metadata_Reference_Information:
Metadata_Date: 2009
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
Address: 600 W 4th St
City: Davenport
State_or_Province: IA
Postal_Code: 52801-1004
Country: U.S.A.
Contact_Voice_Telephone: (563) 328-4137
Contact_Facsimile_Telephone: (563) 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 Thu Jun 17 13:38:27 2010