VTORTHO_0_15M_CLRIR_2023

Metadata also available as

Metadata:

Identification_Information:
Citation:
Citation_Information:
Originator: VT Center for Geographic Information
Publication_Date: 20240102
Title: VTORTHO_0_15M_CLRIR_2023
Edition: 2023A
Geospatial_Data_Presentation_Form: remote-sensing image
Series_Information:
Series_Name: Vermont 2023 Orthoimagery - 15 centimeter
Issue_Identification: 2023A
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 color orthoimagery tiles (uncompressed GeoTIFF and compressed JPEG2000) acquired spring 2023. Product: 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). Geographic Extent: The 2023 project boundary totaled approximately 2639 square miles of 15cm imagery over portions of Addison, Bennington, Caledonia, Caledonia, Chittenden, Franklin, Lamoille, Orange, Orleans, Rutland, Washington, Windham and Windsor Counties. Dataset Description: This metadata describes the 15cm pixel resolution digital orthoimagery produced for the State of Vermont by the Sanborn Map Company. The orthoimagery provided is 4-band (R, G, B, NIR), 8-bit per pixel and delivered in section tiles in uncompressed GeoTIFF and JP2000 (18:1 compression for color, 10:1 for greyscale) compressed formats. The data was collected on April 13th - May 7th, 2023 at an altitude of 4000 meters (AGL) using an UltraCam Eagle camera sensor.
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 20230413
Ending_Date: 20230507
Currentness_Reference: ground condition
Status:
Progress: Complete
Maintenance_and_Update_Frequency: Unknown
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -73.3221
East_Bounding_Coordinate: -71.9634
North_Bounding_Coordinate: 45.0166
South_Bounding_Coordinate: 42.7457
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: Bennington County
Place_Keyword: Caledonia County
Place_Keyword: Chittenden County
Place_Keyword: Franklin County
Place_Keyword: Lamoille County
Place_Keyword: Orange County
Place_Keyword: Orleans County
Place_Keyword: Rutland County
Place_Keyword: Washington County
Place_Keyword: Windham County
Place_Keyword: Windsor County
Use_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.
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: None
Contact_Electronic_Mail_Address: vcgi@vermont.gov
Hours_of_Service: 9am - 5pm, M-F
Purpose:
These data were collected as part of a 5-year project issued by the State of Vermont to collect imagery covering various parts 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:
Project Name: Vermont 2023 Orthoimagery Acquisition Project Location: Portions of Addison, Bennington, Caledonia, Caledonia, Chittenden, Franklin, Lamoille, Orange, Orleans, Rutland, Washington, Windham and Windsor Counties. Please see the bounding coordinates for tile location. Ground Sample Distance: 15 cm Output format: GeoTIFF and JPEG2000 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. Project acquisition dates: The data was collected on April 13th - May 7th, 2023 at an altitude of 4000 meters above ground level (AGL) Dector types and manufacturer: UltraCam Eagle Mark 3 (431S41187X510139-f100 and UC-EpII-1-52311261-f100) Dector types and manufacturer: UltraCam Eagle CCD sensor Filters used (if any): none Band to band registration accuracy (in pixels): Please see individual camera calibration reports included in the final report.
None
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:
Since the ortho images are raster products, the logical consistency is based on how well the images fit between image tiles and between individual photo frames use to produce the ortho mosaics.
Completeness_Report:
The 8848 ortho image tiles are checked for missing pixels, gaps, overlaps and other anomalies generally associated with digital orthophoto products. Any discrepencies in the ortho tiles are resolved through the use of proprietary and industry editing tools. Once the images are copied to the deliverable media they are further checked for naming, image completeness, and ability to be loaded in ArcMap.
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 25 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: 0.105
Horizontal_Positional_Accuracy_Explanation:
Tested 0.105 meters RMSEx as defined by the ASPRS Class 1 Accuracy Standards for 30-cm maps. The RMSEx of the imagery was calculated using 25 independent check points.
Quantitative_Horizontal_Positional_Accuracy_Assessment:
Horizontal_Positional_Accuracy_Value: 0.060
Horizontal_Positional_Accuracy_Explanation:
Tested 0.060 meters RMSEy as defined by the ASPRS Class 1 Accuracy Standards for 30-cm maps. The RMSEy of the imagery was calculated using 25 independent check points.
Quantitative_Horizontal_Positional_Accuracy_Assessment:
Horizontal_Positional_Accuracy_Value: 0.140
Horizontal_Positional_Accuracy_Explanation:
Tested 0.140 meters RMSEr as defined by the ASPRS Class 1 Accuracy Standards for 30-cm maps. The RMSEr of the imagery was calculated using 25 independent check points.
Vertical_Positional_Accuracy:
Vertical_Positional_Accuracy_Report: There is no vertical component for orthophotos.
Lineage:
Process_Step:
Process_Description:
Image acquisition by Sanborn Map Company, was collected between April 13th - May 7th, 2023 using an UltraCam Eagle Camera. 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.
Process_Date: 20230507
Source_Produced_Citation_Abbreviation: Aerial Imagery
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: The Sanborn Map Company, Inc.
Contact_Person: Shawn Benham
Contact_Position: Vice President of Programs
Contact_Address:
Address_Type: Mailing
Address: 1935 Jamboree Drive, Suite 100
City: Colorado Springs
State_or_Province: Colorado
Postal_Code: 80920
Country: USA
Contact_Voice_Telephone: 719-502-1296
Contact_Electronic_Mail_Address: sbenham@sanborn.com
Process_Step:
Process_Description:
DEM Review/Updating. The LiDAR surface is reviewed and updated as needed to meet the final orthorectification standards set in this project.
Process_Date: 20230623
Process_Step:
Process_Description:
Using the processed GPS/IMU data and correctly oriented imagery, a bundle adjustment is computed (AT).
Process_Date: 20230627
Process_Step:
Process_Description:
Orthoimagery is created using the AT solution and Lidar derived DTM. The orthoimagery is then color balanced to the acceptable parameters established by the customer. Orthoimagery then undergoes manual quality control to check for issues as outlined in the Digital Orthoimagery Acceptance Criteria document. Issues such as warps, smears, misalignments, etc. are corrected using proprietary tools and Adobe PhotoShop. Upon completion of the QC process, the orthoimagery is provided to the client for review in uncompressed TIFF/TFW format.
Process_Date: 20230712
Process_Step:
Process_Description:
Sanborn delivered final QCed data to VCGI. VCGI loaded data into VCGI Image Library (VIL) and VT Open Geodata Portal.
Process_Date: 20240223
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Steve Sharp
Contact_Organization: VCGI
Contact_Position: GIS Database Administrator
Process_Step:
Process_Description:
7 ortho image tiles were identified as having "NODATA slivers" along the bottom, something which wasn't originally caught during QC. They were corrected by Sanborn. They included the following tiles VT_50851144_20230415 VT_45990937_20230414 VT_46081099_20230414 VT_47882044_20230421 VT_49051963_20230421 VT_49501954_20230421 VT_50761027_20230420. The new tiles were loaded into the VCGI Image Library and VT Open Geodata Portal. Image services were also corrected.
Process_Date: 20240716
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Steve Sharp
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: 0.9999642857142857
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: None
Contact_Electronic_Mail_Address: vcgi@vermont.gov
Hours_of_Service: 9am - 5pm, M-F
Resource_Description: VTORTHO_0_15M_CLRIR_2023
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/CLRIR/2023/COMP/
Access_Instructions: Downloads available from geodata.vermont.gov.
Offline_Option:
Offline_Media: NOT available on offline media.
Fees:
No charge when downloading from the internet, and when no custom processing is required.
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: 20240114
Metadata_Reference_Information:
Metadata_Date: 20240114
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: None
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 2.9.20 on Tue Jul 16 16:46:19 2024