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KYAPED 2020 Project Area -GeoTIFFs


Identification Information:
Citation:
Citation Information:
Originator: Ian Horn, COT-DGI, Systems Engineer
Publication Date: 20210212
Publication Time: 001200
Title: KYAPED 2020 Project Area -GeoTIFFs
Geospatial Data Presentation Form: remote-sensing image
Online Linkage: ftp://ftp.kymartian.ky.gov/kyaped/KYAPED_2020_6IN/
Publication Information:
Publication Place: 500 Mero Street, Frankfort, Kentucky, 40601
Publisher: Ian Horn
Description:
Abstract: Product: This orthoimagery data set includes 0.5 foot digital orthoimages in 8-bit 4-band (RGB-IR) GeoTIFF tiles. Geographic Extent: 30 counties in Kentucky, covering approximately 3577 total square miles. Dataset Description: The KY Otho Program Year 2 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 foot. 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 foot 8-bit 4-band (RGB-IR) GeoTIFF tiles. Tiled deliverables contained 3989 individual 5000 ft x 5000 ft tiles. Ground Conditions: Imagery was collected in winter and spring 2020, 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, NV5 Geospatial, powered by Quantum Spatial utilized a total of 10 ground control points to assess the horizontal accuracy of the data.
Purpose: These data depict geographic features on the surface of the earth. The dataset was created to current imagery data for Kentucky.
Time Period of Content:
Time Period Information:
Range of Dates/Times:
Beginning Date: 20200304
Ending Date: 20200410
Currentness Reference: Ground condition
Status:
Progress: Complete
Maintenance and Update Frequency: None planned
Spatial Domain:
Bounding Coordinates:
West Bounding Coordinate: -89.704434
East Bounding Coordinate: -81.884235
North Bounding Coordinate: 39.151921
South Bounding Coordinate: 36.456976
Keywords:
Theme:
Theme Keyword Thesaurus: None
Theme Keyword: 0.5 foot orthoimage
Theme Keyword: GeoTIFF
Theme Keyword: rectified photograph
Theme Keyword: rectified image
Theme Keyword: orthophoto
Theme Keyword: natural color orthophoto
Theme Keyword: orthoimage
Theme Keyword: image map
Theme:
Theme Keyword Thesaurus: ISO 19115 Topic Categories
Theme Keyword: imageryBaseMapsEarthCover
Place:
Place Keyword Thesaurus: None
Place Keyword: Kentucky
Place Keyword: Boone County
Place Keyword: Breckinridge County
Place Keyword: Bullitt County
Place Keyword: Carroll County
Place Keyword: Clark County
Place Keyword: Crawford County
Place Keyword: Dearborn County
Place Keyword: Gallatin County
Place Keyword: Grayson County
Place Keyword: Green County
Place Keyword: Hamilton County
Place Keyword: Hardin County
Place Keyword: Harrison County
Place Keyword: Hart County
Place Keyword: Henry County
Place Keyword: Jefferson County
Place Keyword: Kenton County
Place Keyword: Larue County
Place Keyword: Meade County
Place Keyword: Nelson County
Place Keyword: Ohio County
Place Keyword: Oldham County
Place Keyword: Perry County
Place Keyword: Shelby County
Place Keyword: Spencer County
Place Keyword: Switzerland County
Place Keyword: Taylor County
Place Keyword: Trimble County
Place Keyword: Washington 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.
Point of Contact:
Contact Information:
Contact Organization Primary:
Contact Organization: COT-DGI
Contact Person: Ian Horn
Contact Position: Systems Engineer
Contact Address:
Address Type: mailing and physical
Address: 500 Mero Street
City: Frankfort
State or Province: Kentucky
Postal Code: 40601
Contact Voice Telephone: 502-782-6745
Contact Electronic Mail Address: ian.horn@ky.gov
Hours: 8am - 4pm
Contact Instructions: Please email, will respond within 24 hours.
Data Set Credit: COT-Division of Geographical Information, NV5 Geospatial, powered by Quantum Spatial
Native Data Set Environment: 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:
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 10 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: 0.150876
Horizontal Positional Accuracy Explanation: Tested 0.150876 meters (0.5 feet) RMSEx. The RMSEx of the imagery was calculated using 10 independent checkpoints.
Lineage:
Source Information:
Source Citation:
Citation Information:
Originator: NV5
Publication Date: 20210212
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: 202004
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 10 points were used for QC testing. Please see the survey report for more information.
Source Information:
Source Citation:
Citation Information:
Originator: NV5 Geospatial, powered by Quantum Spatial
Publication Date: 20210212
Title: Georeferenced Single Frames
Geospatial Data Presentation Form: remote-sensing image
Source Time Period of Content:
Time Period Information:
Range of Dates/Times:
Beginning Date: 20200304
Ending Date: 20200410
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 93 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 8867 - 9751 feet above mean terrain.
Source Information:
Source Citation:
Citation Information:
Originator: NV5 Geospatial, powered by Quantum Spatial
Publication Date: 20210212
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: 2020
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.
Source Information:
Source Citation:
Citation Information:
Originator: NV5 Geospatial, powered by Quantum Spatial
Publication Date: 20210212
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: 2020
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.
Process Step:
Process Description: Imagery Acquisition: Digital aerial imagery was obtained using a UltraCam Eagle camera equipped with Airborne GPS/IMU. A total of 93 flight lines were collected in the winter and spring 2020 in multi-spectral (RGB-IR) format. The 0.5 foot imagery was acquired at an altitude above mean terrain of 8867 - 9751 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: withheld
Process Date: 20210212
Source Produced Citation Abbreviation: withheld
Process Step:
Process Description: Ground Control Point Collection: A total of 10 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: withheld
Process Date: 20210212
Source Produced Citation Abbreviation: withheld
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: withheld
Source Used Citation Abbreviation: withheld
Source Used Citation Abbreviation: withheld
Process Date: 20210212
Source Produced Citation Abbreviation: withheld
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: withheld
Source Used Citation Abbreviation: withheld
Process Date: 20210212
Source Produced Citation Abbreviation: withheld
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: withheld
Source Used Citation Abbreviation: withheld
Source Used Citation Abbreviation: withheld
Source Used Citation Abbreviation: withheld
Process Date: 20210212
Source Produced Citation Abbreviation: withheld
Spatial Data Organization Information:
Direct Spatial Reference Method: Raster
Raster Object Information:
Raster Object Type: Pixel
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: COT-DGI
Contact Person: Ian Horn
Contact Position: Systems Engineer
Contact Address:
Address Type: mailing and physical
Address: 500 Mero Street
City: Frankfort
State or Province: Kentucky
Postal Code: 40601
Contact Voice Telephone: 502-782-6745
Contact Electronic Mail Address: ian.horn@ky.gov
Hours: 8am - 4pm
Contact Instructions: Please email, will respond within 24 hours.
Resource Description: Downloadable Data
Distribution Liability: See access and use constraints information.
Standard Order Process:
Digital Form:
Digital Transfer Option:
Online Option:
Computer Contact Information:
Network Address:
Network Resource Name: ftp://ftp.kymartian.ky.gov/kyaped/KYAPED_2020_6IN/
Metadata Reference Information:
Metadata Date: 20210219
Metadata Contact:
Contact Information:
Contact Organization Primary:
Contact Organization: COT-DGI
Contact Person: Ian Horn
Contact Position: Systems Engineer
Contact Address:
Address Type: mailing and physical
Address: 500 Mero Street
City: Frankfort
State or Province: Kentucky
Postal Code: 40601
Contact Voice Telephone: 502-782-6745
Contact Electronic Mail Address: ian.horn@ky.gov
Hours: 8am - 4pm
Contact Instructions: Please email, will respond within 24 hours.
Metadata Standard Name: FGDC Content Standard for Digital Geospatial Metadata
Metadata Standard Version: FGDC-STD-001-1998
Metadata Time Convention: local time
Metadata Access Constraints: None.
Metadata Use Constraints: None.
Metadata Security Information:
Metadata Security Classification System: None.
Metadata Security Classification: Unclassified
Metadata Security Handling Description: NONE
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