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WROC Imagery Wisconsin, 2018-2020

Identification Information

Citation
Title
WROC Imagery Wisconsin, 2018-2020
Originator
Wisconsin Regional Orthoimagery Consortium
Publication Date
2021-04-06
Edition
2018-2020
Geospatial Data Presentation Form
mapDigital
Abstract
Ayres Associates was contracted through the North Central Wisconsin Regional Planning Commission (NCWRPC) for the creation of 12-inch pixel county mosaics and DOQQ tiles from the native resolution digital orthoimagery produced under the Wisconsin Regional Orthoimagery Consortium (WROC) in 2018-20. This project established county mosaics and DOQQ tiles for state and federal partners using WROC member data acquired under the Consortium. Please refer to http://ncwrpc.org/WROC2020/ more information on the Consortium. The coverage area included all 72 counties in Wisconsin which was flown in spring 2018, spring 2019, and spring 2020 under leaf-off conditions. The 4-band (RGB-NIR) aerial imagery was collected using Vexcel UltraCam Eagle, Leica ADS 100, and Leica DMCIII sensors outfitted in a fixed-wing aircraft with onboard GNSS/IMU systems and gyro-stabilized mounts. The native resolution aerial imagery was acquired to support 3-inch, 6-inch, and 12-inch ground sample distance (GSD) specifications. Resultant orthoimagery was rectified to DEMs created from new and existing LiDAR data. Orthoimagery was delivered in GeoTIFF format. The re-sampled statewide 4-band, 12-inch pixel DOQQ orthoimagery was produced to meet or exceed a horizontal accuracy standard of 4.8 feet at 95% confidence level according to ASPRS positional accuracy standards for digital geospatial data.
Purpose
Ayres Associates was contracted through the North Central Wisconsin Regional Planning Commission (NCWRPC) for the creation of 12-inch pixel county mosaics and DOQQ tiles from the native resolution digital orthoimagery produced under the Wisconsin Regional Orthoimagery Consortium (WROC) in 2018-20. This project established county mosaics and DOQQ tiles for state and federal partners using WROC member data acquired under the Consortium. Please refer to http://ncwrpc.org/WROC2020/ more information on the Consortium.
Supplemental Information
The Wisconsin Regional Orthoimagery Consortium (WROC) is a multi-entity group led by regional planning commissions (RPCs) and WROC representatives from Ayres Associates. The goal of the consortium is to build and sustain a multi-participant program to acquire digital orthoimagery and elevation data throughout Wisconsin. Orthoimagery was collected to provide consistent deliverable products and accuracy standards for each of the participating entities.
Temporal Extent
Time Instant
2020-12-31T00:00:00
Bounding Box
West
-92.955616
East
-86.666103
North
47.08304
South
42.456895
ISO Topic Category
imageryBaseMapsEarthCover
Place Keyword
Wisconsin
Place Keyword Thesaurus
GNS
Theme Keyword
Orthophotography
Aerial Imagery
Theme Keyword Thesaurus
Resource Constraints
Use Limitation
Imagery available for public consumption on WisconsinView. [Not to be used for purposes other than those strictly outlined in the 2020 WROC NCWRPC program.]
Legal Constraints
Use Limitation
See access and use constraints information.
Maintenance and Update Frequency
unknown
Language
eng
Credit
Wisconsin Regional Orthoimagery Consortium (WROC) Ayres Associates
Point of Contact
Contact
Andrew Faust
Position Name
Senior GIS Analyst
Delivery Point
210 McClellan Street
City
Wausau
Administrative Area
WI
Postal Code
54403
Country
US
Email
afaust@ncwrpc.org
Phone
715.849.5510
Point of Contact
Contact
Ayres Associates
Delivery Point
5201 E. Terrace Dr., Suite 200
City
Madison
Administrative Area
WI
Postal Code
53718
Country
US
Phone
(608) 443-1200

Spatial Reference Information

Reference System Identifier
Code
3071
Code Space
EPSG
Version

Data Quality Information

Lineage
Process Step
Description
Ground control consisted of photo identifiable and paneled surveyed points. The native imagery was collected using Vexcel UltraCam Eagle, Leica ADS100 and Leica DMCIII sensors, which was acquired to support 7.25, 14.5 and 30cm GSD. Image quality was verified during the post flight review phase. Factors considered during this review included, but were not limited to, the presence of cloud cover, contrails, light conditions and sun flare. A rigorous Aerotriangulation process was performed and supplemented by the ground survey locations. The triangulated strips were rectified to DEMs created from new and existing LiDAR data. The imagery was mosaicked using manual seamlines generation and tone/color balanced to a project-wide consistency. DOQQ RGBN tiles were extracted from the statewide mosaic and each individual tile was reviewed for artifacts and anomalies and adjusted as part of quality control procedures. The images were reviewed for rectification problems such as bridge displacements and seamline issues caused by the underlying digital elevation model. When necessary, local corrections to the imagery were performed to minimize such effects.
Process Date
2021-04-06T00:00:00

Distribution Information

Distributor
Wisconsin Regional Orthoimagery Consortium
Distributor
University of Wisconsin-Madison
Online Access
https://bin.ssec.wisc.edu/pub/wisconsinview/NAIP_2020/
Protocol
WWW:DOWNLOAD-1.0-http--download
Name
Function
download

Metadata Reference Information

Hierarchy Level
dataset
Metadata File Identifier
F7DA34DA-74A4-4DF4-8346-75CDA70C86F2
Metadata Point of Contact
Name
Andrew Faust
Position Name
Senior GIS Analyst
Delivery Point
Suite 210
City
Wausau
Administrative Area
WI
Postal Code
54403
Country
US
Email
afaust@ncwrpc.org
Metadata Point of Contact
Name
Ayres Associates
Delivery Point
5201 E. Terrace Dr., Suite 200
City
Madison
Administrative Area
WI
Postal Code
53718
Country
US
Phone
(608) 443-1200
Metadata Date Stamp
2021-06-21
Metadata Standard Name
ISO 19139 Geographic Information - Metadata - Implementation Specification
Metadata Standard Version
2007
Character Set
utf8
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