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2023-04-10T00:00:00
2023-11-16T00:00:00
Ayres Associates
5201 E. Terrace Dr., Suite 200
Madison
Wisconsin
53718
US
(608) 443-1200
(608) 299-2184
1
-93.056942
-92.438479
43.853450
43.491853
This project established digital, 4-band orthoimagery for Mower County, Minnesota in 2023.
Ayres Associates provided digital, 4-band orthoimagery services in 2023 for Mower County, Minnesota. The aerial imagery was collected on March 28th and April 10th using a Microsoft Vexcel UltraCam Eagle M3 sensor mounted in a fixed-wing aircraft. The 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 surface created from existing LiDAR data. Orthoimagery was delivered in PLSS section GeoTiff and MrSID tiles and a project wide MrSID mosaic. The orthoimagery was delivered according to a quarter-section tile schematic.
digital
4-band
orthoimagery
6-inch
Not to be used for purposes other than those outlined in the 2023-24 MERC orthoimagery partnership program.
Mower County, Minnesota
Eric Miller
Mower County
GIS Administrator
201 1st St. NE, Suite #1
Austin
Minnesota
55912
US
(507) 437-9584
Raster Dataset
dataset
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20231117
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 2023 Mower County, Minnesota orthoimagery program.
Ground control consisted of photo identifiable surveyed points. The aerial imagery was collected using a Leica Geosystems DMCIII 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 surface created from exisiting LiDAR data. 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 anaomalies 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
2023-07-21T00:00:00