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WROC Imagery Wisconsin, 2015

Identification Information

Citation
Title
WROC Imagery Wisconsin, 2015
Originator
Wisconsin Regional Orthoimagery Consortium
Publication Date
2016-09-20
Geospatial Data Presentation Form
mapDigital
Collection Title
Statewide, Aerial Imagery
Abstract
Ayres Associates provided NCWRPC with digital orthoimagery services in 2015 as part of WROC. The coverage area included 40 counties in Wisconsin (that are available in WisconsinView) and was flown in spring 2014 and spring 2015 under leaf-off conditions. The 4-band (RGB-NIR) aerial imagery was collected using either a Leica Geosystems ADS 100 or Microsoft Vexcel UltraCam Eagle sensor outfitted in a fixed-wing aircraft with onboard GPS/IMU systems and gyro-stabilized mounts. The native resolution aerial imagery was acquired to support 6-inch and 12-inch ground sample distance (GSD) specifications. Resultant orthoimagery was rectified to new DEMs created from the acquired imagery and existing LiDAR where available. Orthoimagery was delivered in DOQQ GeoTIFF format by county. The re-sampled 4-band, 18-inch pixel DOQQ orthoimagery meets or exceeds +/- 14.4 foot horizontal accuracy at 95% confidence level according to ASPRS standards. Supplemental Information: The Wisconsin Regional Orthophotography 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.
Purpose
Ayres Associates was contracted through the NCWRPC for the creation of 18-inch pixel DOQQ's from the native resolution digital orthophotography produced under the Wisconsin Regional Orthophotography Consortium (WROC) in 2014-15. This project established DOQQ's for state and federal partners using all member data acquired under the Consortium. Please refer to http://ncwrpc.org/WROC2020//wp-content/uploads/2014/06/WROC_2015_InfoSheet_v1.2.pdf for more information.
Supplemental Information
WROC imagery was flown in the spring of 2015, resulting in a "leaf-off" aerial photo product. The entire state of Wisconsin is NOT included in the WROC 2015 flight. County mosaics (.sid) are available for download via WisconsinView. For more information: http://ncwrpc.org/WROC2020//wp-content/uploads/2014/06/WROC_2015_InfoSheet_v1.2.pdf
Temporal Extent
Currentness Reference
Only a portion of the state is covered in the WROC 2014-15 imagery collection.
Time Instant
2015-03-30T00:00:00
Bounding Box
West
-92.955616
East
-86.666103
North
47.08304
South
42.456895
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
Raster
Theme Keyword Thesaurus
FGDC
Theme Keyword
Wisconsin Regional Orthoimagery Consortium
Orthophotography
Aerial Imagery
Theme Keyword Thesaurus
Resource Constraints
Use Limitation
Imagery now available for public consumption on WisconsinView.
Legal Constraints
Use Limitation
Maintenance and Update Frequency
unknown
Language
eng
Credit
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 surveyed points. The imagery was collected using either a Leica Geosystems ADS 100 or Microsoft Vexcel UltraCam Eagle at 14.5 or 29cm 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 photo ID survey points. The triangulated strips were rectified with new DEMs created from the acquired imagery and existing LiDAR where available. The imagery was mosaicked using manual seamlines generation and tone/color balanced to a county-wide consistency. 4-band tiles were extracted from the 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
2016-09-20T00:00:00

Distribution Information

Distributor
Wisconsin Regional Orthoimagery Consortium
Distributor
University of Wisconsin-Madison
Online Access
ftp://ftp.ssec.wisc.edu/pub/wisconsinview/WROC_2015/
Protocol
WWW:DOWNLOAD-1.0-http--download
Name
Function
download

Metadata Reference Information

Hierarchy Level
dataset
Metadata File Identifier
67012BF3-887E-4F01-9941-7EE45C512732
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
2017-02-15
Metadata Standard Name
ISO 19139 Geographic Information - Metadata - Implementation Specification
Metadata Standard Version
2007
Character Set
utf8
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