VTORTHO_0_15M_PAN_2018

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Metadata:

Identification_Information:
Citation:
Citation_Information:
Originator: VT Center for Geographic Information
Publication_Date: 20181220
Title: VTORTHO_0_15M_PAN_2018
Edition: 2018A
Geospatial_Data_Presentation_Form: remote-sensing image
Series_Information:
Series_Name: Vermont 2018 Orthoimagery - 15 centimeter
Issue_Identification: 2018A
Publication_Information:
Publication_Place: Montpelier VT 05620-2001
Publisher: VT Center for Geographic Information
Other_Citation_Details: Tile Structure - 900m X 900m
Description:
Abstract:
15-centimeter black and white orthoimagery tiles (uncompressed GeoTIFF and compressed JPEG2000) derived from original 2018 color orthoimagery tiles. Product: This metadata record describes the acquisition and production of 15-centimeter raw uncompressed imagery (uncompressed TIFF), black and white orthoimagery tiles (uncompressed GeoTIFF and compressed JPEG2000), and color orthoimagery tiles (uncompressed GeoTIFF and compressed JPEG2000) covering portions of Vermont and acquired during the spring of 2018. Geographic Extent: The 2018 15cm extent included partial coverage of Addison, Caledonia, Chittenden, Essex, Franklin, Grand Isle, Lamoille, Orange, Rutland, Washington, and Windsor Counties in Northern Vermont, approximately 913 total square miles. Dataset Description: The Vermont 2018 Orthoimagery project called for the planning, acquisition, processing, and derivative products of imagery data to be collected at an ground sample distance of 15 centimeters. Project specifications are based on the ASPRS Positional Accuracy Standards for Digital Geospatial Data. The data were developed based on a horizontal projection/datum of NAD83 (2011), State Plane Coordinate System Vermont (FIPS 4400), meters. Raw imagery data were produced in 16-bit 4-band (RGB-IR) uncompressed format, then processed to create 24-bit 4-band (RGB-IR) orthorectified tiles. Compressed orthoimagery was produced in JPEG2000 format (18:1 compression). Additional sets of uncompressed GeoTIFF and compressed JPEG 2000 data were produced in black and white. A total of 2,919 tiles were produced with a tile size of 900 meters x 900 meters. Tile names use the following naming convention "VT_(TILENUM)_(YYYYMMDD).(FileExtension)", where: TILENUM = the 8-digit value of the TILENUM attribute in the master index files. YYYYMMDD = the flight acquisition date (or majority date) for that particular tile. Ground Conditions: Imagery was collected in the spring of 2018 during minimal shadow conditions. In order to post process the imagery data to meet task order specifications, Quantum Spatial utilized 53 control points. These control points were established throughout the project area and used to check the accuracy of the data.
Purpose:
These data were collected as part of a 5-year project issued by the State of Vermont to collect imagery covering approximately 20% of the state over a period of five consecutive leaf-off Spring seasons. These data depict geographic features on the surface of the earth.
Supplemental_Information:
Tile ID: n/a Project Name: Vermont 2018 Orthoimagery Project Location: Addison, Caledonia, Chittenden, Essex, Franklin, Grand Isle, Lamoille, Orange, Rutland, Washington, and Windsor Counties. Please see the bounding coordinates for tile location. Ground Sample Distance: 15 cm Output format: TIFs and JPEG2000 Output media: Hard drive Spectrum: 4 separate, distinct bands (red, blue green, and near infrared) Output: Raw images are stored in strips which are processed into TIFs which are then seamed into mosaics. Contractor: Quantum Spatial, Inc. Project acquisition dates and times (also contained in the source information section of the metadata): Lift 20180422-A_N441CJ_SN10541 was flown April 22, 2018 with N441CJ and ADS100 Serial Number 10541 from 13:39:42 to 17:10:50 local time. Lift 20180422-B_N441CJ_SN10541 was flown April 22, 2018 with N441CJ and ADS100 Serial Number 10541 from 18:34:00 to 20:36:41 local time. Lift 20180423-A_N441CJ_SN10541 was flown April 23, 2018 with N441CJ and ADS100 Serial Number 10541 from 13:17:54 to 17:47:16 local time. Lift 20180423-B_N441CJ_SN10541 was flown April 23, 2018 with N441CJ and ADS100 Serial Number 10541 from 19:23:36 to 20:36:06 local time. Lift 20180424-A_N441CJ_SN10541 was flown April 24, 2018 with N441CJ and ADS100 Serial Number 10541 from 13:05:39 to 16:45:16 local time. Lift 20180507-A_N812TB_SN10541 was flown May 7, 2018 with N812TB and ADS100 Serial Number 10541 from 13:44:19 to 18:37:37 local time. Lift 20180508-A_N812TB_SN10541 was flown May 8, 2018 with N812TB and ADS100 Serial Number 10541 from 12:50:45 to 13:15:17 local time. Lift 20180509-B_N812TB_SN10541 was flown May 9, 2018 with N812TB and ADS100 Serial Number 10541 from 18:38:01 to 19:07:40 local time. Dector types and manufacturer: Leica ADS 100 push broom sensor Spacing between CCD detectors (in micrometers): n/a Array Size: 20,000-pixels Nominal ground swath of the detector: 2,000 m Spectral sensitivity of the detector (in nanometers): Red 619-651 Green 525-585 Blue 435-495 Near Infrared 808-882 Filters used (if any): none Scene to scene edge-matching accuracy (in pixels): Offsets greater than 5 pixels were edited. Band to band registration accuracy (in pixels): Please see individual camera calibration reports included in the final report. Horizontal accuracy (in units; also contained in the Horizontal Positional Accuracy Value of the metadata): 0.152 meters RMSEx, 0.128 meters RMSEy, 0.199 meters RMSEr Horizontal Datum (also contained in the Horizontal Datum Name of the metadata): North American Datum of 1983 (2011) Vertical Datum: none Imaging Processing Description (also contained in the process step of the metadata): Data processing of ADS100 imagery and metadata is a streamlined digital workflow process utilizing Quantum Spatial Inc.'s proprietary software and commercial softcopy photogrammetric software including XPro, Inertial Explorer and Orthovista. The ADS100 sensor GPS/IMU position and altitude data are directly processed through three separate but continuous steps: Inertial Explorer for data extracting, data analysis, and data measurement. The post-processed GPS data output is displayed onto the flight profile plot, which clearly shows the RMS values of the combined separation, C/A Code and Carrier Phase. The output GPS/IMU data is also verified by a PDOP plot and PDOP values are compared to an acceptable threshold range. The processing on ADS100 images is based on XPro software using ORIMA for bundle adjustment. Image tie points providing the observations for the least squares bundle adjustment were selected from the images using an autocorrelation algorithm. A least squares bundle adjustment of image pass points and the ABGPS was performed to develop an aerotriangulation solution for each block using XPro Triangulation software. Upon final bundle adjustment, the triangulated strips were ortho-rectified to the DEM. Quantum Spatial generated an elevation model by combining client-provided data, in-house LiDAR data, and data from the National Elevation Dataset. Orthorectified imagery is checked and radiometrically balanced in a parallel process that utilizes custom gradient correction software and the INPHO Orthovista Radiometrics editor. Once both processes have passed rigid AT and QC milestones, the imagery bands, red, green, blue, and near infrared are rectified to a 4-Band RGBN product. These orthos are passed to the mosaic team for QC, seam line placement and tiling using the interactive capabilities of Orthovista software. Following the application of seamline and final tonal adjustment, the orthoimagery is cut to a custom tiling index. An additional set of orthoimagery was produced in black and white. Compressed imagery was produced in JPEG format.
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 20180422
Ending_Date: 20180509
Currentness_Reference: ground condition
Status:
Progress: Complete
Maintenance_and_Update_Frequency: Unknown
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -73.3285968075
East_Bounding_Coordinate: -71.8782070322
North_Bounding_Coordinate: 44.991575972
South_Bounding_Coordinate: 43.7837718671
Keywords:
Theme:
Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: ImageryBaseMapsEarthCover
Theme:
Theme_Keyword_Thesaurus: None
Theme_Keyword: 15 centimeter orthoimage
Theme_Keyword: 15 cm orthoimage
Theme_Keyword: 0.15 meter orthoimage
Theme_Keyword: 0.15 m orthoimage
Theme_Keyword: rectified photograph
Theme_Keyword: rectified image
Theme_Keyword: orthophoto
Theme_Keyword: four band orthophoto
Theme_Keyword: orthoimage
Theme_Keyword: image map
Place:
Place_Keyword_Thesaurus:
U.S. Department of Commerce, 1995, Countries, dependencies, areas of special sovereignty, and their principal administrative divisions, Federal Information Processing Standard (FIPS) 10-4): Washington, D.C., National Institute of Standards and Technology.
Place_Keyword: US
Place:
Place_Keyword_Thesaurus:
U.S. Department of Commerce, 1987, Codes for the Identification of the States, the District of Columbia and the outlying areas of the United States, and associated areas (Federal Information Processing Standard (FIPS) 5-2): Washington, D.C., National Institute of Standards and Technology.
Place_Keyword: VT
Place:
Place_Keyword_Thesaurus: None
Place_Keyword: State of Vermont
Place_Keyword: Addison County
Place_Keyword: Caledonia County
Place_Keyword: Chittenden County
Place_Keyword: Essex County
Place_Keyword: Franklin County
Place_Keyword: Grand Isle County
Place_Keyword: Lamoille County
Place_Keyword: Orange County
Place_Keyword: Rutland County
Place_Keyword: Washington County
Place_Keyword: Windsor County
Access_Constraints:
VCGI and the State of VT make no representations of any kind, including but not limited to the warranties of merchantability or fitness for a particular use, nor are any such warranties to be implied with respect to the data.
Use_Constraints:
None. However, users should be aware that temporal changes may have occurred since this data set was collected and that some parts of this data may no longer represent actual surface conditions.
Native_Data_Set_Environment:
Windows 10 OS; Microsoft Office products; MicroStation version 8; Intergraph suite of products; Esri ArcGIS 10.3; UltraEdit; Global Mapper; GeoExpress 9
Point_of_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: VT Center for Geographic Information
Contact_Address:
Address_Type: Mailing and Physical Address
Address: 1 National Life Dr, Dewey Building, 2nd Floor
City: Montpelier
State_or_Province: VT
Postal_Code: 05620-2001
Country: USA
Contact_Voice_Telephone: (802) 585-0820
Contact_TDD/TTY_Telephone: None
Contact_Facsimile_Telephone:
Contact_Electronic_Mail_Address: vcgi@vermont.gov
Hours_of_Service: 9am - 5pm, M-F
Data_Set_Credit: Vermont Imagery Program (VIP)
Data_Quality_Information:
Attribute_Accuracy:
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 not corrected unless the overall displacement exceeds one foot.
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. Photography was flown during leaf-off in deciduous vegetation regions. The data were clipped to the area of interest.
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
The project specifications require that horizontal accuracy be computed for orthoimagery files. The required accuracy meets or exceeds the ASPRS Class I Accuracy standards for 30-cm maps, derived according to the latest ASPRS standards. The horizontal accuracy was tested with 53 check points. These check points were not used in the calibration or post-processing of the imagery data. The check points were distributed throughout the project area and were surveyed using GPS techniques. 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. Accuracy has been tested to meet 0.300 meter or better RMSEx/RMSEy and 0.424 meter or better RMSEr using ASPRS Class I Accuracy Standards.
Quantitative_Horizontal_Positional_Accuracy_Assessment:
Horizontal_Positional_Accuracy_Value: 0.152
Horizontal_Positional_Accuracy_Explanation:
Tested 0.152 meters RMSEx as defined by the ASPRS Class 1 Accuracy Standards for 30-cm maps. The RMSEx of the imagery was calculated using 53 independent check points.
Quantitative_Horizontal_Positional_Accuracy_Assessment:
Horizontal_Positional_Accuracy_Value: 0.128
Horizontal_Positional_Accuracy_Explanation:
Tested 0.128 meters RMSEy as defined by the ASPRS Class 1 Accuracy Standards for 30-cm maps. The RMSEy of the imagery was calculated using 53 independent check points.
Quantitative_Horizontal_Positional_Accuracy_Assessment:
Horizontal_Positional_Accuracy_Value: 0.199
Horizontal_Positional_Accuracy_Explanation:
Tested 0.199 meters RMSEr as defined by the ASPRS Class 1 Accuracy Standards for 30-cm maps. The RMSEr of the imagery was calculated using 53 independent check points.
Vertical_Positional_Accuracy:
Vertical_Positional_Accuracy_Report: There is no vertical component for orthophotos.
Lineage:
Source_Information:
Source_Citation:
Citation_Information:
Originator: Quantum Spatial
Publication_Date: 2018
Title: Aerial Imagery
Geospatial_Data_Presentation_Form: remote-sensing image
Type_of_Source_Media: hard drive
Source_Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 20180422
Beginning_Time: 133942
Ending_Date: 20180509
Ending_Time: 190740
Source_Currentness_Reference: ground condition
Source_Citation_Abbreviation: AIRPHOTO
Source_Contribution:
New digital, color aerial imagery of the site was acquired using a Leica ADS Digital Sensor (serial number 10541). Airborne GPS/IMU data were recorded at the time of all imagery acquisition. Leica calibrated the sensor used to fly the project. These data were acquired with a Piper Navajo (PA31), twin-piston (Tail Number: N812TB) and a Cessna 441, turboprop (Tail Number: N441CJ) at approximately 2,000 meters above ground level (AGL), acquiring a pixel resolution of 15 cm and a bit depth of 12-bits. Based-upon the CCD Array configuration present in the ADS digital sensor, imagery for each flight line is 20,000-pixels in width. Red, Green, Blue, and Near-Infrared bands were collected.
Source_Information:
Source_Citation:
Citation_Information:
Originator: Quantum Spatial, Inc.
Publication_Date: 2018
Title: Digital Elevation Model
Geospatial_Data_Presentation_Form: raster digital data
Type_of_Source_Media: Hard Drive
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 2018
Source_Currentness_Reference: ground condition
Source_Citation_Abbreviation: DEM
Source_Contribution:
Quantum Spatial generated an elevation model by utilizing client-provided data, in-house LiDAR data, and data from the National Elevation Dataset.
Source_Information:
Source_Citation:
Citation_Information:
Originator: State of Vermont
Publication_Date: 2018
Title: Photo Checkpoints
Geospatial_Data_Presentation_Form: Vector digital data
Type_of_Source_Media: online
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: Unknown
Source_Currentness_Reference: publication date
Source_Citation_Abbreviation: CONTROL
Source_Contribution:
The client-provided control points were used to verify the accuracy of the orthophotos.
Process_Step:
Process_Description:
Data processing of ADS100 imagery and metadata is a streamlined digital workflow process utilizing Quantum Spatial Inc.'s proprietary software and commercial softcopy photogrammetric software including XPro, Inertial Explorer and Orthovista. The ADS100 sensor GPS/IMU position and altitude data are directly processed through three separate but continuous steps: Inertial Explorer for data extracting, data analysis, and data measurement. The post-processed GPS data output is displayed onto the flight profile plot, which clearly shows the RMS values of the combined separation, C/A Code and Carrier Phase. The output GPS/IMU data is also verified by a PDOP plot and PDOP values are compared to an acceptable threshold range. The processing on ADS100 images is based on XPro software using ORIMA for bundle adjustment. Image tie points providing the observations for the least squares bundle adjustment were selected from the images using an autocorrelation algorithm. A least squares bundle adjustment of image pass points and the ABGPS was performed to develop an aerotriangulation solution for each block using XPro Triangulation software. Upon final bundle adjustment, the triangulated strips were ortho-rectified to the DEM. Quantum Spatial generated an elevation model by combining client-provided data, in-house LiDAR data, and data from the National Elevation Dataset. Orthorectified imagery is checked and radiometrically balanced in a parallel process that utilizes custom gradient correction software and the INPHO Orthovista Radiometrics editor. Once both processes have passed rigid AT and QC milestones, the imagery bands, red, green, blue, and near infrared are rectified to a 4-Band RGBN product. These orthos are passed to the mosaic team for QC, seam line placement and tiling using the interactive capabilities of Orthovista software. Following the application of seamline and final tonal adjustment, the orthoimagery is cut to a custom tiling index. Compressed imagery was produced in JPEG format.
Process_Date: 2018
Process_Step:
Process_Description:
QSI delivered final QCed data to VCGI. VCGI loaded data into VCGI Image Library (VIL) and VT Open Geodata Portal.
Process_Date: 20181220
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Ivan Brown
Contact_Organization: VCGI
Contact_Position: GIS Database Administrator
Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method: Raster
Raster_Object_Information:
Raster_Object_Type: pixel
Row_Count: 6000
Column_Count: 6000
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: 4400
Transverse_Mercator:
Scale_Factor_at_Central_Meridian: 0.999964285714286
Longitude_of_Central_Meridian: -72.5
Latitude_of_Projection_Origin: 42.5
False_Easting: 500000.0
False_Northing: 0.0
Planar_Coordinate_Information:
Planar_Coordinate_Encoding_Method: row and column
Coordinate_Representation:
Abscissa_Resolution: 0.15
Ordinate_Resolution: 0.15
Planar_Distance_Units: meter
Geodetic_Model:
Horizontal_Datum_Name: North American Datum of 1983 (2011)
Ellipsoid_Name: Geodetic Reference System 80
Semi-major_Axis: 6378137.0
Denominator_of_Flattening_Ratio: 298.257222101
Entity_and_Attribute_Information:
Overview_Description:
Entity_and_Attribute_Overview:
Four band orthoimagery is organized in four color bands or channels which represent the red, green, blue (RGB) and infrared (IR) portions of the spectrum. Each image pixel is assigned a quadruplet of numeric values, one for each color band. Numeric values range from 0 to 255. There are no void areas in this dataset.
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: VT Center for Geographic Information
Contact_Address:
Address_Type: Mailing and Physical Address
Address: 1 National Life Dr, Dewey Building, 2nd Floor
City: Montpelier
State_or_Province: VT
Postal_Code: 05620-2001
Country: USA
Contact_Voice_Telephone: (802) 585-0820
Contact_TDD/TTY_Telephone: None
Contact_Facsimile_Telephone:
Contact_Electronic_Mail_Address: vcgi@vermont.gov
Hours_of_Service: 9am - 5pm, M-F
Resource_Description: VTORTHO_0_15M_PAN_2018
Distribution_Liability:
VCGI and the State of Vermont make no representations of any kind, including but not limited to the warranties of merchantability or fitness for a particular use, nor are any such warranties to be implied with respect to the data.
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: JPEG2000 and GeoTIFF
Format_Specification: JPEG2000 (18x compression) and GeoTIFF
Format_Information_Content: geospatial data
File_Decompression_Technique: Image viewer
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
https://maps.vcgi.vermont.gov/gisdata/vcgi/imagery/VTORTHO/0_15M/PAN/2018/COMP/
Access_Instructions: Downloads available from geodata.vermont.gov.
Offline_Option:
Offline_Media: NOT available on offline media.
Fees: No charge for downloading
Ordering_Instructions: Send an email describing data request to vcgi@vermont.gov
Turnaround: About 5 days.
Custom_Order_Process: Send an email describing data request to vcgi@vermont.gov
Technical_Prerequisites: GIS Software
Available_Time_Period:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 20181220
Metadata_Reference_Information:
Metadata_Date: 20181220
Metadata_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: VT Center for Geographic Information
Contact_Person: GIS Database Administrator
Contact_Address:
Address_Type: Mailing and Physical Address
Address: 1 National Life Dr, Dewey Building, 2nd Floor
City: Montpelier
State_or_Province: VT
Postal_Code: 05620-2001
Country: USA
Contact_Voice_Telephone: (802) 585-0820
Contact_TDD/TTY_Telephone: None
Contact_Facsimile_Telephone:
Metadata_Standard_Name: FGDC Content Standards for Digital 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: N/A
Metadata_Security_Classification: Unclassified
Metadata_Security_Handling_Description: No security considerations
Generated by mp version 2.9.22 on Thu Aug 25 20:52:23 2022