20251007104153001.0FGDC CSDGM MetadataFALSE220925NW.sidfile://U:\ORTHO\WROC_Portage_Co_ortho_2025\Finals\ThruPS\MrSIDs\220925NW.sidLocal Area Network002220033.287000222799.787000140947.488000143834.4880001ProjectedGCS_NAD83_2011Linear Unit: Foot_US (0.304801)NAD_1983_2011_WISCRS_Portage_Feet<ProjectedCoordinateSystem xsi:type='typens:ProjectedCoordinateSystem' xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance' xmlns:xs='http://www.w3.org/2001/XMLSchema' xmlns:typens='http://www.esri.com/schemas/ArcGIS/10.8'><WKT>PROJCS[&quot;NAD_1983_2011_WISCRS_Portage_Feet&quot;,GEOGCS[&quot;GCS_NAD83_2011&quot;,DATUM[&quot;D_NAD83_National_Spatial_Reference_System_2011&quot;,SPHEROID[&quot;GRS_1980&quot;,6378137.0,298.257222101]],PRIMEM[&quot;Greenwich&quot;,0.0],UNIT[&quot;Degree&quot;,0.0174532925199433]],PROJECTION[&quot;Lambert_Conformal_Conic&quot;],PARAMETER[&quot;false_easting&quot;,185000.0],PARAMETER[&quot;false_northing&quot;,164114.46],PARAMETER[&quot;central_meridian&quot;,-89.5],PARAMETER[&quot;standard_parallel_1&quot;,44.41682397527777],PARAMETER[&quot;scale_factor&quot;,1.000039936],PARAMETER[&quot;latitude_of_origin&quot;,44.41682397527777],UNIT[&quot;Foot_US&quot;,0.3048006096012192]]</WKT><XOrigin>-119590600</XOrigin><YOrigin>-98219600</YOrigin><XYScale>37600309.473469511</XYScale><ZOrigin>-100000</ZOrigin><ZScale>10000</ZScale><MOrigin>-100000</MOrigin><MScale>10000</MScale><XYTolerance>0.0032808333333333331</XYTolerance><ZTolerance>0.001</ZTolerance><MTolerance>0.001</MTolerance><HighPrecision>true</HighPrecision></ProjectedCoordinateSystem>8FALSEWavelet (MG4)5MrSIDTRUEcontinuousunsigned integer202510131541000020251013154100001500000005000FGDC Version 6.2 (Build 9200) ; Esri ArcGIS 10.8.1.14362220925NW.sid2025-04-16T00:00:002025-10-07T00:00:00Ayres Associates5201 E. Terrace Dr., Suite 200MadisonWisconsin53718US(608) 443-12001-89.366074-89.35547944.36112044.353188This project established digital, 4-band orthoimagery for Portage County, Wisconsin as part of the Wisconsin Regional Orthoimagery Consortium (WROC).Ayres Associates provided Portage County, Wisconsin, with digital, 4-band orthoimagery services in 2025 as part of WROC. The aerial imagery was collected on April 16th, 26th, and May 4th using an UltraCam Eagle M3 sensor at 7.25 cm GSD mounted in a fixed-wing aircraft. Aerial imagery was collected to support 0.25 foot ground sample distance (GSD) orthoimagery at 1"=50' map scale. The 3-inch pixel orthoimagery was produced to meet or exceed 0.66 foot RMSEH according to ASPRS Positional Accuracy Standards for Digital Geospatial Data 2024. Resultant orthoimagery was rectified to a DEM created from existing lidar. Orthoimagery was delivered in GeoTiff and MrSID tiles and a project-wide MrSID mosaic. The orthoimagery was delivered according to a PLSS quarter section tile schematic. The project area covers approximately 823 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 Portage County in 2025 to provide consistent deliverable products and accuracy standards for each of the participating entities.digital4-bandorthoimagery3-inchNot to be used for purposes other than those strictly outlined in the 2025 WROC program.Wisconsin Regional Orthoimagery Consortium (WROC)Portage County, WisconsinJeff HartmanPortage CountyGIS/LIS ManagerWisconsinhartmanj@co.portage.wi.usUS1462 Strongs AveStevens Point54481(715) 346-1334Raster DatasetdatasetEPSG8.8(10.4.0)210220033.287000 140947.488000220033.287000 143834.488000222799.787000 143834.488000222799.787000 140947.488000221416.537000 142390.988000110660.250000115480.250000Band_18248.0000000.000000Band_28251.0000000.000000Band_38249.0000000.000000Band_48255.0000000.000000Band_5255.000000255.0000008FalseFalseFalseFalseFalse20251007Ayres Associates5201 E. Terrace Dr., Suite 200MadisonWisconsin53718US(608) 443-1200Ayres AssociatesImages were color corrected to match adjacent flight lines. The resulting imagery was tonally adjusted in terms of contrast and color to form a radiometrically consistent orthophoto mosaic.These data cover the entirety of the 2025 WROC Portage County program.Ground control consisted of photo identifiable surveyed points. The imagery was collected using an UltraCam Eagle M3 sensor at 7.25 cm 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 existing lidar. 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 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.2025-05-16T00:00:00