20240930
15243400
1.0
North American Profile of ISO19115 2003
FALSE
Grant_Co_2024.sid
002
698932.745000
896381.245000
399077.998000
656800.998000
1
Projected
GCS_NAD83_2011
Linear Unit: Foot_US (0.304801)
NAD_1983_2011_WISCRS_Grant_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/10.7'><WKT>PROJCS["NAD_1983_2011_WISCRS_Grant_Feet",GEOGCS["GCS_NAD83_2011",DATUM["D_NAD83_National_Spatial_Reference_System_2011",SPHEROID["GRS_1980",6378137.0,298.257222101]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Transverse_Mercator"],PARAMETER["false_easting",794999.998],PARAMETER["false_northing",0.033],PARAMETER["central_meridian",-90.8],PARAMETER["scale_factor",1.0000349452],PARAMETER["latitude_of_origin",41.41111111111111],UNIT["Foot_US",0.3048006096012192]],VERTCS["VCS Name = NAVD88 height - Geoid12B (ftUS)|Datum Name = North American Vertical",VDATUM["North American Vertical Datum 1988"],PARAMETER["Vertical_Shift",0.0],PARAMETER["Direction",1.0],UNIT["US survey foot",0.3048006096012192]]</WKT><XOrigin>-17654200</XOrigin><YOrigin>-47863500</YOrigin><XYScale>137236666.75921705</XYScale><ZOrigin>-100000</ZOrigin><ZScale>3048.0060960121918</ZScale><MOrigin>-100000</MOrigin><MScale>10000</MScale><XYTolerance>0.0032808333333333331</XYTolerance><ZTolerance>0.0032808333333333335</ZTolerance><MTolerance>0.001</MTolerance><HighPrecision>true</HighPrecision></ProjectedCoordinateSystem>
8
FALSE
Wavelet (MG4)
5
MrSID
TRUE
continuous
unsigned integer
20240930
11294400
20240930
11294400
150000000
5000
FGDC
Version 6.2 (Build 9200) ; Esri ArcGIS 10.7.1.11595
2024 Grant County 6in Ortho
2024-03-11T00:00:00
2024-09-30T00:00:00
Ayres Associates
5201 E. Terrace Dr., Suite 200
Madison
Wisconsin
53718
US
(608) 443-1200
(608) 299-2184
1
-91.160333
-90.419736
43.213303
42.505590
This project established digital, 4-band orthoimagery for Grant County, Wisconsin as part of the Wisconsin Regional Orthoimagery Consortium (WROC).
Ayres Associates provided Grant County, Wisconsin with digital, 4-band orthoimagery services in 2024 as part of WROC. The aerial imagery was collected on March 11th and 20th using a Leica Geosystems DMC III 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 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. Resultant orthoimagery was rectified to a DEM created from LiDAR acquired in 2020. Orthoimagery was delivered in PLSS section GeoTiff and MrSID tiles and a project wide MrSID mosaic. The project area covers approximately 1180 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 Grant County in 2024 to provide consistent deliverable products and accuracy standards for each of the participating entities.
4-band
orthoimagery
6-inch
Not to be used for purposes other than those strictly outlined in the 2023-25 WROC Grant County program.
Wisconsin Regional Orthoimagery Consortium (WROC)
Grant County, Wisconsin
Tiffany Ehlen
Grant County
GIS Specialist
111 S. Jefferson Street, PO Box 529
Lancaster
Wisconsin
53813
tehlen@co.grant.wi.gov
US
(608) 723-2666
Raster Dataset
dataset
EPSG
8.8(10.4.0)
2
1
0
698932.745000 399077.998000
698932.745000 656800.998000
896381.245000 656800.998000
896381.245000 399077.998000
797656.995000 527939.498000
394897
0.500000
515446
0.500000
Band_1
8
184.000000
0.000000
Band_2
8
172.000000
0.000000
Band_3
8
152.000000
0.000000
Band_4
8
193.000000
0.000000
Band_5
255.000000
0.000000
8
20240930
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 2024 WROC Grant County program.
Ground control consisted of photo identifiable surveyed points. The imagery was collected using a Leica Geosystems DMC III 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 created from from LiDAR acquired in 2020. 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.
2024-04-11T00:00:00