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Aerial Imagery for Lafayette County, WI 2023

Identification Information

Citation
Title
Aerial Imagery for Lafayette County, WI 2023
Originator
Lafayette County
Creation Date
2023-04-06
Publication Date
2023-04-06
Geospatial Data Presentation Form
mapDigital
Collection Title
Aerial Imagery
Abstract
Ayres Associates provided Lafayette County, Wisconsin with digital, 4-band orthoimagery services in 2023 as part of WROC. The aerial imagery was collected on April 6th and 8th using a Microsoft Vexcel UltraCam Eagle M3 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, 2014. Resultant orthoimagery was rectified to a DEM created from existing LiDAR acquired in 2019. Orthoimagery was delivered in PLSS section GeoTiff and SID tiles and a project wide SID mosaic. The orthoimagery was delivered according to a PLSS section tile schematic. The project area covers approximately 634 square miles. Supplemental Information: The Wisconsin Regional Orthoimagery Consortium (WROC) is a multi-entity group led by regional planning commissions (RPCs) and WROC respresentatives 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 Lafayette County in 2023 to provide consistent deliverable products and accuracy standards for each of the participating entities.
Purpose
This data is intended for reference and mapping purposes, and may be used for basic applications such as viewing, querying, and map output production, or to provide a basemap to support graphical overlays and analysis with other spatial data. [This project established digital, 4-band orthoimagery for Lafayette County, Wisconsin in 2023 as part of the Wisconsin Regional Orthoimagery Consortium (WROC).]
Supplemental Information
This is an archived dataset held at UW-Madison.
Temporal Extent
Time Instant
2023-04-06T00:00:00
Bounding Box
West
-90.42692031
East
-89.83770683
North
42.81388376
South
42.50566507
ISO Topic Category
imageryBaseMapsEarthCover
Place Keyword
Lafayette 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 2023 Lafayette County WROC program.]
Status
completed
Maintenance and Update Frequency
notPlanned
Language
eng
Credit
Lafayette County, Ayres Associates
Point of Contact
Contact
Chris Colney
Position Name
GIS Coordinator/Land Information Officer
Delivery Point
626 Main Street, Room 203
City
Darlington
Administrative Area
Wisconsin
Postal Code
53530
Country
US
Email
chris.colney@lafayettecountywi.org
Phone
(608) 776-4864

Spatial Reference Information

Reference System Identifier
Code
7608
Code Space
EPSG
Version
8.8(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 M3 sensor 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 DTM created from existing LiDAR. 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
2023-08-16T00:00:00
Process Step
Description
Added data to the WisconsinView Data Archive (WDA).
Process Date
2026-06-15T00:00:00

Distribution Information

Format Name
GeoTIFF
Format Version
1.0
Distributor
UW-Madison
Online Access
https://geodata.wisc.edu/
Protocol
Name
GeoData@Wisconsin
Function
download

Content Information

Content Type
image

Spatial Representation Information

Raster
Number of Dimensions
2
Column Count
11087
Row Count
11661
Cell Geometry Type
area
Corner Points
Point
426148.918000 129642.369000
Point
426148.918000 135472.869000
Point
431692.418000 135472.869000
Point
431692.418000 129642.369000
Center Point
428920.668000 132557.619000

Metadata Reference Information

Hierarchy Level
dataset
Metadata File Identifier
282d93d1-b5cc-4da5-991c-ac036a6b6217
Metadata Date Stamp
2026-06-15
Metadata Standard Name
ISO 19139 Geographic Information - Metadata - Implementation Specification
Metadata Standard Version
2007
Character Set
utf8
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