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Aerial Photography, Pierce County, WI 2020

Identification Information

Citation
Title
Aerial Photography, Pierce County, WI 2020
Originator
Pierce County
Creation Date
2020-04-22
Publication Date
2020-04-22
Edition
2020
Geospatial Data Presentation Form
mapDigital
Collection Title
Aerial Imagery
Abstract
Ayres Associates provided Pierce County, Wisconsin with digital, 4-band orthoimagery services in 2020 as part of WROC. The aerial imagery was collected on April 22nd, 24th, 25th, 26th, 27th, 30th and May 7th using a Microsoft Vexcel UltraCam Eagle sensor mounted in a fixed-wing aircraft. Aerial imagery was collected to support 0.5 foot ground sample distance (GSD) orthoimagery to meet ASPRS Class II horizontal accuracy specifications at 1" = 100' map scale. The 6-inch pixel orthoimagery was produced to meet or exceed a horizontal accuracy of 1.4 feet RMSE according to ASPRS Positional Accuracy Standards for Digital Geospatial Data. Resultant orthoimagery was rectified to a DEM created from existing LiDAR acquired in 2015. Orthoimagery was delivered in PLSS section GeoTiff and MrSID tiles and a project wide MrSID mosaic. The project area covers approximately 593 square miles. Supplemental Information: The Wisconsin Regional Orthoimagery Consortium (WROC) is a multi-entity group of county members and partners 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 for Pierce County in 2020 to provide consistent deliverable products and accuracy standards for each of the participating entities.
Purpose
This project established digital, 4-band orthoimagery services for Pierce County, Wisconsin as part of the Wisconsin Regional Orthoimagery Consortium (WROC).
Supplemental Information
This is an archived copy of the data held at UW-Madison.
Temporal Extent
Time Instant
2020-04-22T00:00:00
Bounding Box
West
-92.808388
East
-92.124647
North
44.875526
South
44.525349
ISO Topic Category
imageryBaseMapsEarthCover
Place Keyword
Pierce County, Wisconsin
Place Keyword Thesaurus
Theme Keyword
Wisconsin Regional Orthoimagery Consortium (WROC)
Theme Keyword Thesaurus
Resource Constraints
Use Limitation
Although this data is being distributed by the University of Wisconsin-Madison, no warranty expressed or implied is made by the University as to the accuracy of the data and related materials. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the University in the use of this data, or related materials. [Not to be used for purposes other than those strictly outlined in the 2020 WROC Pierce County program.]
Status
completed
Maintenance and Update Frequency
notPlanned
Language
eng
Credit
Ayres Associates, Pierce County
Point of Contact
Contact
Kevin Etherton
Position Name
GIS Specialist
Delivery Point
414 W. Main St.
City
Ellsworth
Administrative Area
Wisconsin
Postal Code
54011
Country
US
Email
kevin.etherton@co.pierce.wi.us

Spatial Reference Information

Reference System Identifier
Code
7624
Code Space
EPSG
Version
9.1(10.4.0)

Data Quality Information

Lineage
Process Step
Description
Ground control consisted of photo identifiable surveyed points. The imagery was collected using a Microsoft Vexcel UltraCam Eagle at 14.5cm 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 to a DEM created from existing LiDAR acquired in 2012. The imagery was mosaicked using manual seamlines generation and tone/color balanced to a project-wide consistency. PLSS section RGBN 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
2020-06-11T00:00:00
Process Step
Description
Added data to geospatial archive at UW-Madison
Process Date
2024-12-09T00:00:00

Distribution Information

Format Name
Raster Dataset
Online Access
https://web.s3.wisc.edu/wsco-wisconsinview/imagery/counties/Pierce/2020
Protocol
WWW:DOWNLOAD-1.0-ftp—download
Name
Access from GeoData@Wisconsin
Function
download

Content Information

Content Type
image

Spatial Representation Information

Raster
Number of Dimensions
2
Column Count
12315
Row Count
11181
Cell Geometry Type
area
Corner Points
Point
568592.367000 262641.082000
Point
568592.367000 268231.582000
Point
574749.867000 268231.582000
Point
574749.867000 262641.082000
Center Point
571671.117000 265436.332000

Metadata Reference Information

Hierarchy Level
dataset
Metadata File Identifier
DE8B55E2-0A10-4B35-9DEF-2E317C11A1C5
Metadata Date Stamp
2024-12-09
Metadata Standard Name
ISO 19139 Geographic Information - Metadata - Implementation Specification
Metadata Standard Version
2007
Character Set
utf8
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