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KYAPED 2019 Project Area - 6 Inch Imagery


Identification Information:
Citation:
Citation Information:
Originator: Kevin Hogue, Kentucky Division of Geographic Information, Systems Enginner IT
Publication Date: 20200414
Publication Time: 120000
Title: KYAPED 2019 Project Area - 6 Inch Imagery
Geospatial Data Presentation Form: remote-sensing image
Publication Information:
Publication Place: 500 Mero St, First Floot, Frankfort, KY, 40601, US
Publisher: Kevin Hogue
Online Linkage: ftp://ftp.kymartian.ky.gov/kyaped/KYAPED_2019_6IN
Description:
Abstract: Product: This orthoimagery data set includes 0.5 ft digital orthoimages in 8-bit 4-band (RGBN) GeoTIFF tiles. Geographic Extent: 63 counties in Kentucky, covering approximately 20,120 total square miles. Dataset Description: The KY Ortho Program Year 1 - 2019 project called for the planning, acquisition, processing, and derivative products of imagery data to be collected at a ground sample distance (GSD) of 0.5 ft. Project specifications are based on the American Society of Photogrammetry and Remote Sensing (ASPRS) standards. The data were developed based on a horizontal projection/datum of NAD 1983 StatePlane Kentucky FIPS 1600 Feet, Foot US. Imagery data were delivered as 0.5 ft 8-bit 4-band (RGBN) GeoTIFF tiles. Tiled deliverables contained 23093 individual 5000 ft x 5000 ft tiles. Ground Conditions: Imagery was collected in spring 2019, while no snow was on the ground and rivers were at or below normal levels. In order to post process the imagery data to meet task order specifications and meet ASPRS horizontal accuracy guidelines, Quantum Spatial, Inc. utilized a total of 61 ground control points to assess the horizontal accuracy of the data.
Purpose: 6" Color Orthoimagery was captured for 63 Counties in the Eastern half of the Commonwealth as part of Aerial Photography acquisition in Kentucky's Aerial Photography and Elevation Data program (KYAPED)
Time Period of Content:
Time Period Information:
Range of Dates/Times:
Beginning Date: 20190225
Ending Date: 20190416
Currentness Reference: Ground condition
Status:
Progress: Complete
Maintenance and Update Frequency: None planned
Spatial Domain:
Bounding Coordinates:
West Bounding Coordinate: -85.6180213942
East Bounding Coordinate: -81.8948577703
North Bounding Coordinate: 38.8849575949
South Bounding Coordinate: 36.5373600718
Keywords:
Theme:
Theme Keyword Thesaurus: None
Theme Keyword: 0.5 ft orthoimage
Theme Keyword: GeoTIFF
Theme Keyword: natural color orthophoto
Theme Keyword: rectified photograph
Theme Keyword: rectified image
Theme Keyword: orthoimage
Theme Keyword: image map
Theme Keyword: orthophoto
Theme:
Theme Keyword Thesaurus: ISO 19115 Topic Categories
Theme Keyword: imageryBaseMapsEarthCover
Place:
Place Keyword Thesaurus: None
Place Keyword: Anderson County
Place Keyword: Bath County
Place Keyword: Bell County
Place Keyword: Bourbon County
Place Keyword: Boyd County
Place Keyword: Boyle County
Place Keyword: Bracken County
Place Keyword: Breathitt County
Place Keyword: Carter County
Place Keyword: Casey County
Place Keyword: Clark County
Place Keyword: Clay County
Place Keyword: Clinton County
Place Keyword: Cumberland County
Place Keyword: Elliott County
Place Keyword: Estill County
Place Keyword: Fayette County
Place Keyword: Fleming County
Place Keyword: Floyd County
Place Keyword: Franklin County
Place Keyword: Garrard County
Place Keyword: Grant County
Place Keyword: Greenup County
Place Keyword: Harlan County
Place Keyword: Harrison County
Place Keyword: Jackson County
Place Keyword: Jessamine County
Place Keyword: Johnson County
Place Keyword: Knott County
Place Keyword: Knox County
Place Keyword: Laurel County
Place Keyword: Lawrence County
Place Keyword: Lee County
Place Keyword: Leslie County
Place Keyword: Letcher County
Place Keyword: Lewis County
Place Keyword: Lincoln County
Place Keyword: Madison County
Place Keyword: Magoffin County
Place Keyword: Martin County
Place Keyword: Mason County
Place Keyword: McCreary County
Place Keyword: Menifee County
Place Keyword: Mercer County
Place Keyword: Montgomery County
Place Keyword: Morgan County
Place Keyword: Nicholas County
Place Keyword: Owen County
Place Keyword: Owsley County
Place Keyword: Pendleton County
Place Keyword: Perry County
Place Keyword: Pike County
Place Keyword: Powell County
Place Keyword: Pulaski County
Place Keyword: Robertson County
Place Keyword: Rockcastle County
Place Keyword: Rowan County
Place Keyword: Russell County
Place Keyword: Scott County
Place Keyword: Wayne County
Place Keyword: Whitley County
Place Keyword: Wolfe County
Place Keyword: Woodford County
Access Constraints: No restrictions apply to these data.
Use Constraints: None. However, users should be aware that temporal changes may have occurred since this dataset was collected and that some parts of these data may no longer represent actual surface conditions. Users should not use these data for critical applications without a full awareness of their limitations. Acknowledgement of the organization providing these data to the public would be appreciated for products derived from these data.
Data Set Credit: Quantum Spatial, Inc.
Native Data Set Environment: Windows 10.1; Esri ArcGIS 10.3.1; ImageStation Orientation 2015/Version 15.00.0000 Build 395; Leica MissionPro version 11.6 ; OrthoPro v.06.02.0100.00017
Data Quality Information:
Attribute Value Accuracy Information:
Attribute Accuracy Report: Radiometry is verified by visual inspection of the digital orthophoto. Slight systematic radiometric differences may exist between adjacent orthoimage files; these are due primarily to differences in source image capture dates and sun angles along flight lines. These differences can be observed in an image's general lightness or darkness when it is compared to adjacent orthoimage file coverages. Tonal balancing may be performed over a group of images during the mosaicking process which may serve to lighten or darken adjacent images for better color tone matching.
Logical Consistency Report: All GeoTIFF tagged data and image file sizes are validated using commercial GIS software to ensure proper loading before being archived. This validation procedure ensures correct physical format and field values for tagged elements. Seamlines and tile edges are visually inspected. Seamline mismatches are corrected unless the overall displacement is less than one pixel.
Completeness Report: Orthoimages are visually inspected for completeness to ensure that no gaps or image misplacements exist within and between adjacent images. These images are derived by mosaicking multiple images to ensure complete coverage. Source imagery is cloud free.
Positional Accuracy:
Horizontal Positional Accuracy:
Horizontal Positional Accuracy Report: The project specifications require that only horizontal accuracy be computed for orthoimagery files. The required accuracy meets or exceeds ASPRS standards. The horizontal accuracy was tested with 61 checkpoints located throughout the project area. These checkpoints were not used in the calibration or post-processing of the imagery data. The checkpoints were distributed throughout the project area and were surveyed using GPS techniques. See survey report for additional survey methodologies. The x and y positions of where the checkpoints fell on the orthoimagery were collected. These values were then compared to the surveyed control point x and y values.
Quantitative Horizontal Positional Accuracy Assessment:
Horizontal Positional Accuracy Value: 0.179474
Horizontal Positional Accuracy Explanation: Tested 0.179474 meters (0.59 feet) RMSEx. The RMSEx of the imagery was calculated using 61 independent checkpoints.
Vertical Positional Accuracy:
Vertical Positional Accuracy Report: There is no vertical component for orthophotos.
Lineage:
Source Information:
Source Citation:
Citation Information:
Originator: Quantum Spatial, Inc.
Publication Date: 20200311
Title: DEM
Geospatial Data Presentation Form: raster digital data
Type of Source Media: onLine
Source Time Period of Content:
Time Period Information:
Single Date/Time:
Calendar Date: 20190101
Source Currentness Reference: publication date
Source Citation Abbreviation: DEM
Source Contribution: A compilation of topographic land form elevation datasets developed using in-house LiDAR data and data from the National Elevation Dataset for use in developing digital ortho imagery.
Source Information:
Source Citation:
Citation Information:
Originator: Quantum Spatial, Inc.
Publication Date: 20200311
Title: Georeferenced Single Frames
Geospatial Data Presentation Form: remote-sensing image
Type of Source Media: None
Source Time Period of Content:
Time Period Information:
Range of Dates/Times:
Beginning Date: 20190225
Ending Date: 20190416
Source Currentness Reference: ground condition
Source Citation Abbreviation: PHOTO
Source Contribution: Aerial imagery was acquired using a UltraCam Eagle camera with a flight design that included a total of 400 flight lines. Aerial imagery was supplemented with the simultaneous acquisition of airborne GPS/IMU data, which captured the ground coordinate for the nadir point of each photograph. Aerial imagery was exposed at an altitude of 9300 feet above mean terrain.
Source Information:
Source Citation:
Citation Information:
Originator: Quantum Spatial, Inc.
Publication Date: 20200311
Title: GPS Photo Control Survey
Geospatial Data Presentation Form: vector digital data and tabular data
Type of Source Media: onLine
Source Time Period of Content:
Time Period Information:
Single Date/Time:
Calendar Date: 20190731
Source Currentness Reference: ground condition
Source Citation Abbreviation: CONTROL
Source Contribution: Quantum Spatial performed a geodetic control survey in support of the digital orthophoto production project. A total of 61 points were used for QC testing. Please see the survey report for more information.
Source Information:
Source Citation:
Citation Information:
Originator: Quantum Spatial, Inc.
Publication Date: 20200311
Title: Aerotriangulation
Geospatial Data Presentation Form: model
Type of Source Media: onLine
Source Time Period of Content:
Time Period Information:
Single Date/Time:
Calendar Date: 20190101
Source Currentness Reference: ground condition
Source Citation Abbreviation: AT
Source Contribution: Softcopy aerotriangulation was performed utilizing the airborne GPS/IMU data, GPS ground control and image coordinate measurements allowing the direct computation of the exterior orientation parameters for each image of the project.
Process Step:
Process Description: Surface Creation: This process involved the development of seamless topographic landform elevation dataset utilizing in-house LiDAR data and data from the National Elevation Dataset to support the production of digital orthophotography that meet or exceed required orthophoto horizontal accuracy. The topographic features included a grid of elevation points and may include break lines that define ridges, valleys, edge of water, transportation features and abrupt changes in elevation. The final DEM is suitable for orthophoto production only (not suitable for contour generation). The DEM is used to then generate a Triangulated Irregular Network (TIN) to support orthophoto production. The final DEM used for orthophoto production was delivered in countywide rasters in a file geodatabase.
Source Used Citation Abbreviation: LiDAR
Source Used Citation Abbreviation: DEM
Process Date: 20191220
Source Produced Citation Abbreviation: DEM
Process Step:
Process Description: Aerotriangulation: Softcopy aerotriangulation was performed on one large block of imagery. The airborne GPS/IMU data, GPS ground control, and image coordinate measurements were utilized to allow the direct computation of the exterior orientation parameters for each image frame to support the photogrammetric process and orthophoto production.
Source Used Citation Abbreviation: Control
Source Used Citation Abbreviation: ABGPS
Source Used Citation Abbreviation: RAWs
Process Date: 20191220
Source Produced Citation Abbreviation: AT
Process Step:
Process Description: Orthophoto Processing: Utilizing all four bands [blue (B), green (G), red (R), and infrared (IR)] digital orthorectification was performed using bilinear interpolation algorithms resulting in a spatial and radiometric transformation of the digital image from line/sample space into NAD 1983 StatePlane Kentucky FIPS 1600 Feet, Foot US. The interior and exterior orientation parameters from the aerotriangulation process were used to project each pixel into the ground coordinate system, while the ortho grade DEM was used to correct for relief displacement. Radiometric correction software and techniques were used to create orthophoto files that minimize the appearance of image seams and without loss of feature signature. Orthophotos are checked for geometric accuracy, image quality, and are tonally balanced to produce a uniform contrast and tone across the entire project. The individual overlapping orthophoto frames were mosaicked together. The ortho photos meet ASPRS horizontal accuracy standards.
Source Used Citation Abbreviation: Georefs
Source Used Citation Abbreviation: AT
Source Used Citation Abbreviation: DEM
Source Used Citation Abbreviation: Control
Process Date: 20191220
Source Produced Citation Abbreviation: Orthos
Process Step:
Process Description: Imagery Acquisition: Digital aerial imagery was obtained using a UltraCam Eagle camera equipped with Airborne GPS/IMU. A total of 400 flight lines were collected in the spring 2019 in multi-spectral (RGB-IR) format. The 0.5 ft imagery was acquired at an altitude above mean terrain of 9300 feet to yield a pixel resolution suitable for photogrammetric mapping and orthophoto production. The imagery was collected under conditions free from clouds and cloud shadows, smoke, fog, haze, light streaks, snow, ice on water bodies, flooding, excessive soil moisture, and foliage. The imagery consisted of blue, green, red, and infrared bands. Imagery for the photogrammetric mapping and digital orthophotos was captured according to task order specifications regarding, snow, haze, and cloud cover.
Source Used Citation Abbreviation: RAWs
Process Date: 20191220
Source Produced Citation Abbreviation: Georefs
Process Step:
Process Description: Ground Control Point Collection: A total of 61 control points were established throughout the project area using a combination of conventional and GPS survey methods in order to support softcopy aerotriangulation and photogrammetric mapping meeting the accuracies specified in this Scope of Work. Ground control collection followed requirements set forth in the task order specifications. Please see the survey report for more information.
Source Used Citation Abbreviation: Geodetic control
Process Date: 20191220
Source Produced Citation Abbreviation: Control
Spatial Data Organization Information:
Raster Object Information:
Raster Object Type: Grid Cell
Row Count: 10000
Column Count: 10000
Entity and Attribute Information:
Overview Description:
Entity and Attribute Overview: Three band orthoimagery is organized in three color bands or channels which represent the red, green, and blue (RGB) portions of the spectrum. Four band orthoimagery is organized in four color bands or channels which represent the red, green, blue (RGB), and near infrared (IR) portions of the spectrum. Each image pixel is assigned a triplet or quadruplet of numeric values, one for each color band. Numeric values range from 0 to 255.
Entity and Attribute Detail Citation: U.S. Department of the Interior, U.S. Geological Survey, 1996, Standards for Digital Orthophotos: Reston, VA.
Distribution Information:
Distributor:
Contact Information:
Contact Organization Primary:
Contact Organization: Kentucky Division of Geographic Information
Contact Person: Kevin Hogue
Contact Position: Systems Enginner IT
Contact Address:
Address Type: physical
Address: 500 Mero St, First Floor
City: Frankfort
State or Province: KY
Postal Code: 40601
Country: US
Contact Voice Telephone: 502-782-0703
Contact Electronic Mail Address: kevin.hogue@ky.gov
Hours: 8:00 am -4:30 pm EST
Contact Instructions: Email Preferred
Resource Description: Downloadable Data
Distribution Liability: See access and use constraints information.
Metadata Reference Information:
Metadata Date: 20200311
Metadata Contact:
Contact Information:
Contact Organization Primary:
Contact Organization: Kentucky Division of Geographic Information
Contact Person: Kevin Hogue
Contact Position: Systems Enginner IT
Contact Address:
Address Type: physical
Address: 500 Mero St, First Floor
City: Frankfort
State or Province: KY
Postal Code: 40601
Country: US
Contact Voice Telephone: 502-782-0703
Contact Electronic Mail Address: kevin.hogue@ky.gov
Hours: 8:00 am -4:30 pm EST
Contact Instructions: Email Preferred
Metadata Standard Name: FGDC Content Standard for Digital Geospatial Metadata
Metadata Standard Version: FGDC-STD-001-1998
Metadata Time Convention: local time
Metadata Security Information:
Metadata Security Classification System: None.
Metadata Security Classification: Unclassified
Metadata Security Handling Description: NONE
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