View Metadata

Aerial Imagery for Brown County, WI 2023

Identification Information

Citation
Title
Aerial Imagery for Brown County, WI 2023
Originator
Brown County
Creation Date
2023-04-14
Publication Date
2023-04-14
Geospatial Data Presentation Form
mapDigital
Collection Title
Aerial Imagery
Abstract
Ayres Associates provided Brown County, Wisconsin with digital, 4-band orthoimagery services in 2023 as part of WROC. The aerial imagery was collected on April 14th, May 9th and 10th using a Leica Geosystems DMC III 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 I horizontal accuracy specifications at 1"=100' map scale. The NSSDA test results against existing X,Y locations was .427 feet RMSE. Resultant orthoimagery was rectified to a DEM surface created from countywide LiDAR data acquired in 2020. Orthoimagery was delivered in GeoTiff, MrSID tiles, municipal MrSID mosaics, and a county-wide MrSID mosaic. The orthoimagery was delivered according to a county supplied tile schematic. Supplemental Information: The Wisconsin Regional Orthoimagery Consortium (WROC) is a multi-entity group of county members and partners led by representatives from Ayres Associates and the North Central Wisconsin Regional Planning Commission (NCWRPC). 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 Brown 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 Brown County, Wisconsin in 2023 as part of the Wisconsin Regional Orthoimagery Consortium (WROC).]
Supplemental Information
This is an archived dataset at UW-Madison.
Temporal Extent
Time Instant
2023-04-14T00:00:00
Bounding Box
West
-88.25266384
East
-87.76244495
North
44.67985322
South
44.24041177
ISO Topic Category
imageryBaseMapsEarthCover
Place Keyword
Brown 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 Brown County program.]
Status
completed
Maintenance and Update Frequency
notPlanned
Language
eng
Credit
Brown County, Ayres Associates
Point of Contact
Contact
Jeff DuMez
Position Name
GIS Coordinator / Land Information Officer
Delivery Point
305 E Walnut Street
City
Green Bay
Administrative Area
Wisconsin
Postal Code
54301
Country
US
Email
Jeff.dumez@browncountywi.gov
Phone
920-492-4972

Spatial Reference Information

Reference System Identifier
Code
8213
Code Space
EPSG
Version
9.1(10.7.0)

Data Quality Information

Lineage
Process Step
Description
Ground control consisted of photo identifiable surveyed points. The imagery was collected using a Leica Geosystems DMC III sensor at 14.5cm GSD. Image quality was verified during the post flight review phase. Factors considered during this phase 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 surface created from countywide Lidar data acquired in 2020. The imagery was mosaicked using manual seamlines generation and tone/color balanced to a project-wide consistency. Client provided 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
2023-09-19T00:00:00
Process Step
Description
Added data to the WisconsinView Data Archive (WDA).
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/Brown/2023/
Protocol
Name
Access from GeoData@Wisconsin
Function
download

Content Information

Content Type
image

Spatial Representation Information

Raster
Number of Dimensions
2
Column Count
6000
Row Count
6000
Cell Geometry Type
area
Corner Points
Point
63690.000000 464860.000000
Point
63690.000000 467860.000000
Point
66690.000000 467860.000000
Point
66690.000000 464860.000000
Center Point
65190.000000 466360.000000

Metadata Reference Information

Hierarchy Level
dataset
Metadata File Identifier
360d86c3-f47b-4a33-a2c8-c1c2abee2dd9
Metadata Date Stamp
2026-06-12
Metadata Standard Name
ISO 19139 Geographic Information - Metadata - Implementation Specification
Metadata Standard Version
2007
Character Set
utf8
Download