Digital Orthoimagery, McLeod County, Minnesota, Spring 2022

Product: This orthoimagery data set includes 0.33-foot digital orthoimages in 8-bit 4-band GeoTIFF; MrSID county mosaic files (30:1 compression) and (15:1 compression) along with Jpeg2000 mosaic files. The geographic extent of McLeod County, Minnesota covers approximately 504 total square miles.Dataset Description: The McLeod County, MN 2022 Digital Orthoimagery project comprised of planning, acquisition, processing, and derived products of imagery data collected at a ground sample distance (GSD) of 0.33-foot. Project specifications are based on the American Society of Photogrammetry and Remote Sensing (ASPRS) standards. The data were developed based on a horizontal projection/datum of NAD83(86)HARN McLeod County, MN Coordinates, US Feet. Imagery data were delivered as 0.33-foot 8-bit 4-band GeoTIFF; MrSID county mosaic (MG3, 15:1 and 30:1 compression). Deliverables contained 605 individual irregular tiles. Ground Conditions: Imagery was collected in spring 2022, while no snow was on the ground and rivers were at or below normal levels. In order to post process the imagery data to meet task order specifications and meet ASPRS horizontal accuracy guidelines, 95West Aerial Mapping utilized a total of 7 control points to tie imagery to the ground and 5 check points to assess the horizontal accuracy of the Aerial Triangulation (AT).