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Version 6.2 (Build 9200) ; Esri ArcGIS 10.7.1.11595
2020Image
2020-04-21T00:00:00
2020-09-29T00:00:00
Ayres Associates
5201 E. Terrace Dr., Suite 200
Madison
Wisconsin
53718
US
(608) 443-1200
(608) 299-2184
1
-89.502880
-89.481665
44.068884
44.053998
This project established digital, 4-band orthoimagery for Waushara County, Wisconsin as part of the Wisconsin Regional Orthoimagery Consortium (WROC).
Ayres Associates provided Waushara County, Wisconsin, with digital, 4-band orthoimagery services in 2020 as part of WROC. The aerial imagery was collected on April 21st using a Leica Geosystems DMCIII sensor mounted in a fixed-wing aircraft. Aerial imagery was collected to support 1.0 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 exisiting LiDAR collected in 2017. Orthoimagery was delivered in PLSS section GeoTiff and MrSID tiles and a project wide MrSID mosaic. The orthoimagery was delivered according to a section tile schematic. The project area covers approximately 637 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 Waushara County in 2020 to provide consistent deliverable products and accuracy standards for each of the participating entities.
digital
4-band
orthoimagery
6-inch
Not to be used for purposes other than those strictly outlined in the 2020 WROC Waushara County program.
Wisconsin Regional Orthoimagery Consortium (WROC)
Waushara County, Wisconsin
Zachery Newton
Waushara County
GIS Specialist/RPL
P.O. Box 300, 209 S. Saint Marie St.
Wautoma
Wisconsin
54982
US
Raster Dataset
dataset
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20200929
Ayres Associates
5201 E. Terrace Dr., Suite 200
Madison
Wisconsin
53718
US
(608) 443-1200
(608) 299-2184
Ayres Associates
Images were color corrected to match adjacent flight lines. The resulting imagery was globally tilted in terms of contrast and color to form a radiometrically consistent orthophoto mosaic.
These data cover the entirety of the 2020 WROC Waushara County program.
Ground control consisted of photo identifiable surveyed points. The imagery was collected using a Leica Geosystems DMCIII at 14.5 cm 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 surface created from existing LiDAR collected in 2017. 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.
2020-05-21T00:00:00