Lake County, FL 100 scale, 0.5' pixel digital color orthophotography (2008).

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Metadata:

Identification_Information:
Citation:
Citation_Information:
Originator: Kucera International Inc.
Publication_Date: Unknown
Title:
Lake County, FL 100 scale, 0.5' pixel digital color orthophotography (2008).
Edition: 1.0
Geospatial_Data_Presentation_Form: raster digital data
Publication_Information:
Publication_Place: unknown
Publisher: unknown
Description:
Abstract:
This metadata describes the digital ortho imagery for Lake County, FL. This 1":100' scale imagery is comprised of natural color orthophotography with a GSD (Ground Sample Distance) of 0.5'. Imagery was collected with the Leica ADS40 digital sensor and processed with Leica GPro software. This imagery is projected in NAD83 FL East State Plane Coordinate System feet.
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 bounding coordinates in this metadata file represent the bounding coordinates for all image tiles in project area as a whole, not an individual tile.
Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 20080217
Currentness_Reference: Ground condition
Status:
Progress: Complete
Maintenance_and_Update_Frequency: Unknown
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -81.976058
East_Bounding_Coordinate: -81.330033
North_Bounding_Coordinate: 29.284803
South_Bounding_Coordinate: 28.332950
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: Florida
Place_Keyword: Lake County
Place_Keyword: City of Tavares
Access_Constraints: None
Use_Constraints: None
Point_of_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Kevin Hamilton
Contact_Organization:
Lake County Board of County Commissioners, Department of Information Technology, GIS Division
Contact_Position: Senior GIS Analyst
Contact_Address:
Address_Type: mailing and physical
Address: 317 West Main Street, Historic Courthouse, 4th Floor
City: Tavares
State_or_Province: FL
Postal_Code: 32778
Country: U.S.
Contact_Voice_Telephone: 352-343-9705 ext 5798
Contact_Facsimile_Telephone: unknown
Contact_Electronic_Mail_Address: khamilton@lakecountyfl.gov
Hours_of_Service: 0700-1500, M-F EST
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. The residuals of the adjustment met the required standards with the results fully outlined in an AT report.
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 NMAS standards. It has been tested at 95% confidence level to have an RMS positional displacement within 3' 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 0.6'.
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: raster digital data
Publication_Information:
Publication_Place: None
Publisher: None
Source_Scale_Denominator: 1200
Type_of_Source_Media: disc
Source_Time_Period_of_Content:
Time_Period_Information:
Multiple_Dates/Times:
Single_Date/Time:
Calendar_Date: 20080129; 20080202; 20080210; 20080211; 20080216; 20080217
Source_Currentness_Reference: Ground condition
Source_Citation_Abbreviation: IMG
Source_Contribution:
The aerial imagery was captured with a Leica Geosystems ADS40 digital camera. The ADS40 uses a 'pushbroom' method of data collection with different sensors using forward, rearward and nadir orientations along planned flightlines. This results in one image per sensor for each flightline. The aerial images are used to AT the project and the production of orthophotos.
Source_Information:
Source_Citation:
Citation_Information:
Originator: Lake County, FL
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: 2008
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. 103 control points were used for this project.
Source_Information:
Source_Citation:
Citation_Information:
Originator: Kucera International Inc.
Publication_Date: Unknown
Title: Digital elevation model
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: 2006
Source_Currentness_Reference: Ground condition
Source_Citation_Abbreviation: DEM
Source_Contribution:
This project used existing LiDAR-derived DEM data. The DEM is used in the orthophoto production process.
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: Unknown
Publisher: Unknown
Type_of_Source_Media: disc
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 2008
Source_Currentness_Reference: Ground condition
Source_Citation_Abbreviation: TLDEF
Source_Contribution:
The tile definition is used to cut orthorectified imagery into manageable, usable images. Each tile is 5000' X 5000'.
Source_Information:
Source_Citation:
Citation_Information:
Originator: Kucera International Inc.
Publication_Date: Unpublished material
Title: Orthorectified imagery
Edition: 1.0
Geospatial_Data_Presentation_Form: raster digital data
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: 2008
Source_Currentness_Reference: Ground condition
Source_Citation_Abbreviation: OIMG1
Source_Contribution:
This first level of orthorectified images are the product of using the AT 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: raster digital data
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: 2008
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: 2008
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: 2008
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: 2008
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: 2008
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: 2008
Source_Produced_Citation_Abbreviation: OIMG1
Process_Step:
Process_Description:
Orthorectified imagery is mosaicked, locally color-balanced and cut to the tile definition boundaries using Stellacore OrthoVista software. The tiled orthos are checked for accuracy against the surveyed ground control before further image editing.
Source_Used_Citation_Abbreviation: OIMG1, CONT
Process_Date: 2008
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 flightlines. 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: 2008
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: 0901 Florida East
Transverse_Mercator:
Scale_Factor_at_Central_Meridian: 1.0
Longitude_of_Central_Meridian: -81.000000
Latitude_of_Projection_Origin: 24.333333
False_Easting: 656166.666666
False_Northing: 0.000000
Planar_Coordinate_Information:
Planar_Coordinate_Encoding_Method: Coordinate pair
Coordinate_Representation:
Abscissa_Resolution: 0.5'
Ordinate_Resolution: 0.5'
Planar_Distance_Units: U.S. Feet
Geodetic_Model:
Horizontal_Datum_Name: North American Datum of 1983
Ellipsoid_Name: Geodetic Reference System 80
Semi-major_Axis: 6378137.0
Denominator_of_Flattening_Ratio: 298.25722210088
Vertical_Coordinate_System_Definition:
Altitude_System_Definition:
Altitude_Datum_Name: North American Vertical Datum of 1988
Altitude_Resolution: NA
Altitude_Distance_Units: NA
Altitude_Encoding_Method: NA
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: Kevin Hamilton
Contact_Organization:
Lake County Board of County Commissioners, Department of Information Technology, GIS Division
Contact_Position: Senior GIS Analyst
Contact_Address:
Address_Type: mailing and physical
Address: 317 West Main Street, Historic Courthouse, 4th Floor
City: Tavares
State_or_Province: FL
Postal_Code: 32778
Country: U.S.
Contact_Voice_Telephone: 352-343-9705 ext 5798
Contact_Facsimile_Telephone: unknown
Contact_Electronic_Mail_Address: khamilton@lakecountyfl.gov
Hours_of_Service: 0700-1500, M-F EST
Resource_Description:
Lake County, FL 100 scale, 0.5' pixel digital color orthophotography in (2008).
Distribution_Liability:
Lake County, FL 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: unknown
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name: Unknown
Access_Instructions: Unknown
Fees: Unknown
Ordering_Instructions: Unknown
Available_Time_Period:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: Unknown
Metadata_Reference_Information:
Metadata_Date: 20080520
Metadata_Review_Date: 20080520
Metadata_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Kevin Hamilton
Contact_Organization:
Lake County Board of County Commissioners, Department of Information Technology, GIS Division
Contact_Position: Senior GIS Analyst
Contact_Address:
Address_Type: mailing and physical
Address: 317 West Main Street, Historic Courthouse, 4th Floor
City: Tavares
State_or_Province: FL
Postal_Code: 32778
Country: U.S.
Contact_Voice_Telephone: 352-343-9705 ext 5798
Contact_Facsimile_Telephone: unknown
Contact_Electronic_Mail_Address: khamilton@lakecountyfl.gov
Hours_of_Service: 0700-1500, M-F EST
Metadata_Standard_Name: FGDC CSDGM
Metadata_Standard_Version: FGDC-STD-001-1998
Generated by mp version 2.9.1 on Fri Jun 27 10:18:14 2008