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Dodge_Co_MN_2019.sid
2019-04-20T00:00:00
2019-09-10T00:00:00
Ayres Associates
5201 E. Terrace Dr., Suite 200
Madison
Wisconsin
53718
US
(608) 443-1200
(608) 299-2184
1
-93.048605
-92.674733
44.198476
43.846563
This project established digital, 4-band orthoimagery for Dodge County, Minnesota in 2019.
Ayres Associates provided digital, 4-band orthoimagery services in 2019 for Dodge County, Minnesota. The aerial imagery was collected on April 20th using a Leica Geosystems DMCIII 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 section tile schematic.
digital
4-band
orthoimagery
6-inch
Not to be used for purposes other than those strictly outlined in the 2019 Dodge County, Minnesota orthoimagery program.
Dodge County, Minnesota
Ryan DeCook
Dodge County
Land Records Director
721 Main St. North
Mantorville
Minnesota
55955
US
Raster Dataset
dataset
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20190911
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 2019 Dodge 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 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.
2019-05-21T00:00:00