Description: Ayres Associates provided Lafayette County, Wisconsin, with digital color orthoimagery services in 2015 as part of WROC. The aerial imagery was collected on April 11, 2015, using an Leica Geosystems ADS100 sensor mounted in a fixed-wing aircraft. Aerial 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 horizontal accuracy meets or exceeds 2.0 feet RMSE using the National Standard for Spatial Data Accuracy (NSSDA) standards. Resultant orthoimagery was rectified to the new DEM created from existing LiDAR created as part of the CDBG funded WROC program. 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 total project area is 634 square miles, plus a 500-ft buffer around the county boundary. Geographic Description: Lafayette County is located in southwestern Wisconsin in the Driftless Area, characterized by steep river valleys and wooded slopes. The county has light urban areas, such as the City of Darlington, but the majority of the land is used for agriculture. A prominent topographical feature of the county are the Platte Mounds, rising between 1,200 and 1,500 feet above sea level, providing the county with a diverse landscape. Supplemental Information: The Wisconsin Regional Orthophotography Consortium (WROC) is a multi-entity group 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 Lafayette County in 2015 to provide consistent deliverable products and accuracy standards for each of the participating entities.