Summit County, OH Color Orthophotography (2005) MrSID format 60:1, Portage Township mosaic

Metadata:

Identification_Information:
Citation:
Citation_Information:
Originator: Kucera International Inc.
Title:
Summit County, OH Color Orthophotography (2005) MrSID format 60:1, Portage Township mosaic
Edition: One
Geospatial_Data_Presentation_Form: remote-sensing image
Publication_Information:
Publication_Place: Akron, Ohio
Publisher: Summit County Fiscal Office GIS
Online_Linkage: <http://www.co.summit.oh.us>
Larger_Work_Citation:
Citation_Information:
Publication_Date: Unpublished Material
Publication_Time: Kucera International Inc.
Title: Project 58486 Summit Co. GIS
Edition: One
Geospatial_Data_Presentation_Form: Various
Publication_Information:
Description:
Abstract:
A digital orthophoto (DO) is a digital raster image of an aerial photograph which, through a process of differential rectification, has been brought to an accurate, uniform scale with a specified tolerance. The differential rectification process involves relating the digital photo imagery to terrain coordinates and elevations (e.g., a digital terrain model) so as to correct for scale variation due to terrain relief and image displacement due to the angular offsets of the aerial camera at the time of exposure. A digital orthophoto is essentially the image-based equivalent of a photogrammetrically compiled planimetric map.
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:
60:1 compression, 1 foot pixel resolution.

Metadata written by Kucera International with minor editing by Summit County GIS.

Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 20050410
Time_of_Day: Midday
Currentness_Reference: ground condition
Status:
Progress: Complete
Maintenance_and_Update_Frequency: As needed
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -81.695042
East_Bounding_Coordinate: -81.383582
North_Bounding_Coordinate: 41.354621
South_Bounding_Coordinate: 40.901977
Keywords:
Theme:
Theme_Keyword: aerial
Theme_Keyword: basemap
Theme_Keyword: orthophoto
Theme_Keyword: digital orthophoto
Theme_Keyword: MrSID
Theme_Keyword: 60:1 compression
Theme_Keyword: 1' pixel
Place:
Place_Keyword: Summit County
Place_Keyword: Ohio
Place_Keyword: Akron
Place_Keyword: Cuyahoga Falls
Place_Keyword: Portage Township
Temporal:
Temporal_Keyword: 2005
Access_Constraints: None
Use_Constraints: None
Point_of_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Summit County Fiscal Office GIS
Contact_Address:
Address_Type: mailing and physical address
Address: 175 South Main St.
City: Akron
State_or_Province: OH
Postal_Code: 44308
Country: USA
Contact_Voice_Telephone: (330)643-8361
Contact_Voice_Telephone: (330)643-2679
Contact_Facsimile_Telephone: (330)643-2622
Contact_Electronic_Mail_Address: gis@summitoh.net
Hours_of_Service: Monday - Friday 7:30 AM - 4:00 PM Eastern time
Data_Set_Credit: Kucera International Inc.
Native_Data_Set_Environment:
Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.1.0.722
Data_Quality_Information:
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
The original TIF images used to compile this mosaic comply with ASP Class 1 standards. It has been tested at 95% confidence level to have an RMS positional displacement within 1 foot 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 horizonatal RMS is 0.532 feet.

This accuracy may or may not apply to this mosaic because of desampling and compression processes.

Vertical_Positional_Accuracy:
Vertical_Positional_Accuracy_Report: No vertical component for orthophotos.
Lineage:
Source_Information:
Source_Citation:
Citation_Information:
Originator: Kucera International Inc.
Title: Aerial Photography
Geospatial_Data_Presentation_Form: remote-sensing image
Source_Scale_Denominator: 7920
Type_of_Source_Media: DVD
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 20050410
Source_Currentness_Reference: ground condition
Source_Citation_Abbreviation: IMG
Source_Contribution:
Aerial images are used to aerial triangulate (AT) the project, compile mapping and also for the production of orthophotos.
Source_Information:
Source_Citation:
Citation_Information:
Originator: Rolling, Hocevar
Title: Ground Control
Edition: One
Geospatial_Data_Presentation_Form: vector digital data
Type_of_Source_Media: disc
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 20050409
Source_Currentness_Reference: ground condition
Source_Citation_Abbreviation: CONT
Source_Contribution:
Control is used to create a digital control file and control report as well as QC check of ortho accuracy. Predifined 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: Woolpert
Title: Digital Elevation Model
Edition: One
Geospatial_Data_Presentation_Form: map
Publication_Information:
Publication_Place: None
Publisher: None
Type_of_Source_Media: disc
Source_Citation_Abbreviation: DEM
Source_Contribution:
The digital elevation model (DEM) was created by Woolpert and supplied to Kucera by Summit County. Kucera supplemented bridge decks and overpasses in the county with breaklines. The DEM is used to create orthophotos.
Source_Information:
Source_Citation:
Citation_Information:
Originator: Kucera International Inc.
Title: Tile Definition
Edition: One
Geospatial_Data_Presentation_Form: vector digital data
Type_of_Source_Media: disc
Source_Time_Period_of_Content:
Source_Currentness_Reference: publication date
Source_Citation_Abbreviation: TLDEF
Source_Contribution:
The tile definition is an ASCII text file listing the name and bounding coordinates for each tile in the image index. This is used to crop and control the amount of forward lean and sidelap between orthos. This also helps reduce the amount of large ground features (i.e. buildings) from being in the feathering area during the mosaicking process. The tile definition remains the same as previously used for Summit County.
Source_Information:
Source_Citation:
Citation_Information:
Originator: Kucera International Inc.
Title: Orthophotography
Edition: One
Geospatial_Data_Presentation_Form: raster digital data
Source_Scale_Denominator: 1200
Type_of_Source_Media: disc
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 20050410
Source_Currentness_Reference: ground condition
Source_Citation_Abbreviation: OIMG
Source_Contribution:
Orthophotos are mosaicked together to create a full-tile, deliverable orthophoto.
Process_Step:
Process_Description:
At selected locations throughout the site, accurate GPS coordinates and elevations of monumented/referenced ground points are surveyed and the points are marked with targets which will be visible in the aerial photography of the site.
Process_Date: 20050409
Source_Produced_Citation_Abbreviation: CONT
Process_Step:
Process_Description:
New color aerial photography of the site is acquired using a USGS calibrated/approved aerial camera system mounted in a twin-engine aircraft. The aerial camera used was Zeiss RMK Top 15 (serial no. 145860). Last calibrated by the USGS on 09/2003. Calibrated focal length is 152.483 mm, with an AWAR resolution rating of 101. Film type was Kodak Aerochrome II Color Negative Film 2444. 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 also operated on the ground over known site points during the flyover to provide data necessary to relate the aerial camera position and orientation measurements to the terrain coordinate system.
Process_Date: 20050410
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), resulting in an image pixel resolution of 0.50'.
Source_Used_Citation_Abbreviation: IMG
Process_Step:
Process_Description:
The airborne GPS/IMU data is processed 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.
Process_Step:
Process_Description:
The scanned digital photo imagery for each exposure is directly oriented on digital orthophoto production stations using the associated airborne GPS/IMU data and rectified to digital elevation model data.
Source_Used_Citation_Abbreviation: IMG
Source_Produced_Citation_Abbreviation: IMG
Process_Step:
Process_Description:
Using automatic image processing software, blocks of rectified digital images are mosaicked together and radiometrically adjusted (tone balanced) across the images to achieve a generally seamless appearance. Each mosaicked raster image was individually adjusted in Adobe Photoshop after automated processing to correct for anomolies in the mosaic.
Source_Used_Citation_Abbreviation: IMG
Source_Produced_Citation_Abbreviation: IMG
Process_Step:
Process_Description:
Automated image processing software is used to extract individual image tiles with client-specified tile system. Orthophoto tile system is modular with tiles measuring 2000' by 3000' and is defined by coordinate grid lines of NAD83 State Plane Coordinate System, Ohio North zone.
Source_Used_Citation_Abbreviation: IMG
Source_Used_Citation_Abbreviation: TLDEF
Source_Produced_Citation_Abbreviation: OIMG
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: OIMG
Source_Used_Citation_Abbreviation: CONT
Source_Produced_Citation_Abbreviation: OIMG
Process_Step:
Process_Description:
Individual TIFF format tiled images processed to produce 60:1 compression level SID township mosaics.
Process_Step:
Process_Description:
Back-up copies of raw scanned and rectified imagery are maintained.
Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method: Raster
Raster_Object_Information:
Raster_Object_Type: Pixel
Row_Count: 30000
Column_Count: 30000
Vertical_Count: 1
Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Planar:
Grid_Coordinate_System:
Grid_Coordinate_System_Name: State Plane Coordinate System
State_Plane_Coordinate_System:
SPCS_Zone_Identifier: 3401 Ohio North
Lambert_Conformal_Conic:
Standard_Parallel: 40.433333
Standard_Parallel: 41.700000
Longitude_of_Central_Meridian: -82.500000
Latitude_of_Projection_Origin: 39.666667
False_Easting: 1968499.999800
False_Northing: 0.000000
Planar_Coordinate_Information:
Planar_Coordinate_Encoding_Method: row and column
Coordinate_Representation:
Abscissa_Resolution: 1.000000
Ordinate_Resolution: 1.000000
Planar_Distance_Units: survey feet
Geodetic_Model:
Horizontal_Datum_Name: North American Datum of 1983
Ellipsoid_Name: Geodetic Reference System 80
Semi-major_Axis: 20925604.472041
Denominator_of_Flattening_Ratio: 298.257
Vertical_Coordinate_System_Definition:
Altitude_System_Definition:
Entity_and_Attribute_Information:
Detailed_Description:
Entity_Type:
Entity_Type_Label: Band_1
Attribute:
Attribute_Label: ObjectID
Attribute_Definition: Internal feature number.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Unrepresentable_Domain:
Sequential unique whole numbers that are automatically generated.
Attribute:
Attribute_Label: Value
Attribute:
Attribute_Label: Count
Detailed_Description:
Entity_Type:
Entity_Type_Label: Band_2
Attribute:
Attribute_Label: ObjectID
Attribute_Definition: Internal feature number.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Unrepresentable_Domain:
Sequential unique whole numbers that are automatically generated.
Attribute:
Attribute_Label: Value
Attribute:
Attribute_Label: Count
Detailed_Description:
Entity_Type:
Entity_Type_Label: Band_3
Attribute:
Attribute_Label: ObjectID
Attribute_Definition: Internal feature number.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Unrepresentable_Domain:
Sequential unique whole numbers that are automatically generated.
Attribute:
Attribute_Label: Value
Attribute:
Attribute_Label: Count
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.
Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Summit County Fiscal Office GIS
Contact_Address:
Address_Type: mailing and physical address
Address: 175 South Main St.
City: Akron
State_or_Province: Ohio
Postal_Code: 44308
Country: USA
Contact_Voice_Telephone: (330)643-8361
Contact_Voice_Telephone: (330)643-2679
Contact_Facsimile_Telephone: 330-643-2622
Contact_Electronic_Mail_Address: gis@summitoh.net
Resource_Description:
2005 county-wide color orthophotography, SID format 60:1 township mosaic
Distribution_Liability:
Summit 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 express 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:
Transfer_Size: 40.191
Metadata_Reference_Information:
Metadata_Date: 20060620
Metadata_Review_Date: 20060609
Metadata_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Kucera International, Inc.
Contact_Address:
Address_Type: mailing and physical address
Address: 38133 Western Pkwy.
City: Willoughby
State_or_Province: OH
Postal_Code: 44094
Country: USA
Contact_Voice_Telephone: (800)745-8237
Contact_Voice_Telephone: (440)975-4230
Contact_Facsimile_Telephone: (440)975-4238
Contact_Electronic_Mail_Address: map@kucerainternational.com
Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
Metadata_Time_Convention: local time
Metadata_Extensions:
Online_Linkage: <http://www.esri.com/metadata/esriprof80.html>
Profile_Name: ESRI Metadata Profile
Generated by mp version 2.8.6 on Fri Jun 30 09:36:22 2006