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2024_Ayres
2024-03-12T00:00:00
2024-07-25T00:00:00
Ayres Associates
5201 E. Terrace Dr., Suite 200
Madison
Wisconsin
53718
US
(608) 443-1200
(608) 299-2184
1
-88.523711
-88.341005
43.828297
43.704028
2024 orthoimagery for the City of Fond du Lac, Wisconsin.
Ayres Associates provided the City of Fond du Lac, Wisconsin with digital, 4-band orthoimagery services in 2024 as part of WROC. The aerial imagery was collected on March 12th using a Vexcel UltraCam Eagle M3 sensor mounted in a fixed-wing aircraft. Aerial imagery was collected to support 0.25 foot ground sample distance (GSD) orthoimagery to meet ASPRS Class II horizontal accuracy specifications at 1" = 50' map scale. The 3-inch pixel orthoimagery was produced to meet or exceed a 1.2 foot horizontal accuracy at 95% confidence level, according to ASPRS Positional Accuracy Standards for Digital Geospatial Data. Resultant orthoimagery was rectified to a DEM created from newly acquired LiDAR collected in 2024. Orthoimagery was delivered in PLSS quarter-section GeoTiff and MrSID tiles and a project wide MrSID mosaic. The project area covers approximately 52 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 the City of Fond du Lac in 2024 to provide consistent deliverable products and accuracy standards for each of the participating entities.
2024
ortho
These data cover the entirety of the 2024 WROC City of Fond du Lac program.
Wisconsin Regional Orthoimagery Consortium (WROC)
City of Fond du Lac, Wisconsin
Gene Olig
City of Fond du Lac
GIS Coordinator
160 South Macy Street
Fond du Lac
Wisconsin
54935
US
(920) 322-3485
Raster Dataset
dataset
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20240725
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 2024 WROC City of Fond du Lac program.
Ground control consisted of photo identifiable surveyed points. The imagery was collected using a Microsoft Vexcel UltraCam Eagle M3 at 7.25cm 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 newly acquired LiDAR collected in 2024. The imagery was mosaicked using manual seamlines generation and tone/color balanced to a project-wide consistency. PLSS quarter-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.
2024-04-12T00:00:00