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Aerial Imagery for Ashland County, WI 2023

Identification Information

Citation
Title
Aerial Imagery for Ashland County, WI 2023
Originator
Ashland County
Creation Date
2023-05-14
Publication Date
2023-05-14
Geospatial Data Presentation Form
mapDigital
Collection Title
Aerial Imagery
Abstract
Ayres Associates provided Ashland County, Wisconsin with digital, 4-band orthoimagery services in 2023 as part of WROC. The aerial imagery was collected on May 14th and 15th 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 according to ASPRS Positional Accuracy Standards for Digital Geospatial Data. Resultant orthoimagery was rectified to a DEM created from LiDAR collected in 2020. Orthoimagery was delivered in PLSS section GeoTiff and MrSID tiles and a project wide MrSID mosaic. The project area covers approximately 1,267 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 Ashland 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 Ashland 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
2023-05-14T00:00:00
Bounding Box
West
-90.02767349
East
-89.59794989
North
44.24944943
South
43.64102574
ISO Topic Category
imageryBaseMapsEarthCover
Place Keyword
Ashland 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 2023-25 WROC Ashland County program.]
Status
completed
Maintenance and Update Frequency
notPlanned
Language
eng
Credit
Ashland County, Ayres Associates
Point of Contact
Contact
Brittany Goudos-Weisbecker
Position Name
GIS Coordinator/Land Information Officer
Delivery Point
201 Main Street West, Room 205A
City
Ashland
Administrative Area
Wisconsin
Postal Code
54806
Country
US
Email
brittany.goudos-weisbecker@co.ashland.wi.us
Phone
(715) 685-2002

Spatial Reference Information

Reference System Identifier
Code
7588
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 DEM created from LiDAR collected in 2020. 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
2023-06-11T00:00:00
Process Step
Description
Added data to WisconsinView Data Archive (WDA) in 2026.
Process Date
2026-06-12T00:00:00

Distribution Information

Format Name
GeoTIFF
Format Version
1.0
Distributor
UW-Madison
Online Access
https://web.s3.wisc.edu/wsco-wisconsinview/imagery/counties/WI/Ashland/2023/
Protocol
Name
GeoData@Wisconsin
Function
download

Content Information

Content Type
image

Spatial Representation Information

Raster
Number of Dimensions
2
Column Count
12376
Row Count
10946
Cell Geometry Type
area
Corner Points
Point
643087.244000 126684.446000
Point
643087.244000 132157.446000
Point
649275.244000 132157.446000
Point
649275.244000 126684.446000
Center Point
646181.244000 129420.946000

Metadata Reference Information

Hierarchy Level
dataset
Metadata File Identifier
d9542967-7f4d-47a3-8164-4a2a101a9fc5
Metadata Date Stamp
2026-06-12
Metadata Standard Name
ISO 19139 Geographic Information - Metadata - Implementation Specification
Metadata Standard Version
2007
Character Set
utf8
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