Ayres Associates Unknown 2709_06SW.sid raster digital data withheld 2709_06SW.sid The purpose of this project is to gain increased resolution and updated county-wide imagery of the City of Eau Claire and Eau Claire County. Ayres Associates provided the Cities of Eau Claire and Altoona (hereinafter referred to as the Cities) with digital color orthophotography and topographic mapping services in 2013. Digital aerial imagery was collected on April 28, 2013 using a Vexcel UltraCam Eagle, digital photogrammetric mapping camera. Imagery was collected to support 3-inch resolution digital orthoimagery to National Map Accuracy Standards for 1 = 50 map scale. Resultant orthoimagery was rectified to a new digital terrain model, comprising of a newly developed LiDAR bare earth surface. Orthoimagery was delivered in PLSS quarter section GeoTiff and MrSID tiles and a project wide MrSID mosaic. The Cities area is located in northwest Eau Claire County and extends into the southwest part of Chippewa County in the Lake Hallie area. The Eau Claire River and Chippewa River run through the project area, with the confluence in downtown Eau Claire. The total project area is 117 square miles mainly urban and suburban with some rural and agricultural areas around the periphery. en 20130428 ground condition Complete None planned -91.528801 -91.518771 44.850855 44.843121 331775.705000 334369.205000 290272.692000 293085.192000 digital color orthophotography 3-inch Altoona Eau Claire City Lake Hallie Area Chippewa Eau Claire County To be determined by client. To be determined by client. Matthew J. Janiak Eau Claire County Surveyor
721 Oxford Avenue
Eau Claire Wisconsin 54703-5481 715-839-4742 715-831-5802 ESRI ArcCatalog 9.3.1.3000 Raster Dataset Check points taken from overlap areas of adjacent image strips contribute image chips--smaller portions of the reference orthophotos surrounding the check points that have the same accuracy as the GPS and are highest in accuracy--to each orthophoto tile are typically consistent to the 2-3 pixel level. This not only ensures that a consistent mosaic can be created from the adjacent image strips acquired with the sensor but also means that the images have good precision and as a group are spatially self-consistent. These data cover the entirety of the 2013 City of Eau Claire orthophotography project. Orthophotography was generated to meet National Map Accuracy Standards for 1"=50' scale mapping. The imagery was collected using an Vexcel UltraCam Eagle, digital photogrammetric mapping camera. The triangulated strips were rectified with a new digital terrain model, comprising of a newly developed LiDAR bare earth surface. The red, green and blue bands were combined to generate a final orthophoto. In addition to color and tonal balancing, these eight bit images were adjusted to create seamless imagery to the highest extent practically achievable. The imagery was mosaicked using manual seamline generation. PLSS quarter-section tiles were extracted from the initial mosaic. The individual quarter-section tiles were manually edited to correct minor anomalies in the rectification or mosaicking process. Raster Pixel 11250 10374 1 0.250000 0.250000 8 Upper Left FALSE Wavelet (MG3) 3 pixel codes MrSID TRUE row and column 0.250000 0.250000 survey feet Lambert Conformal Conic 44.872281 -91.288889 44.872281 394000.000000 300812.797000 D_North_American_1983_HARN Geodetic Reference System 80 6378137.000000 298.257222 GCS_North_American_1983_HARN NAD_1983_HARN_WISCRS_EauClaire_County_Feet 20131018 Ayres Associates mailing and physical address
5201 E. Terrace Drive, Suite 201
Madison Wisconsin 53718 608-443-1200 608-443-1250 FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998 local time en http://www.esri.com/metadata/esriprof80.html ESRI Metadata Profile 20131018 11220300 FALSE 20131018 11220400 20131018 11220400 {7B2FDF08-43F0-4E66-8AE8-655A658122FB} ESRI ArcCatalog 9.3.1.3000 2709_06SW.sid 331775.705 334369.205 293085.192 290272.692 1 -91.528801 -91.518771 44.850855 44.843121 1 ISO 19115 Geographic Information - Metadata DIS_ESRI1.0 dataset withheld Local Area Network 002 Raster Dataset NAD_1983_HARN_WISCRS_EauClaire_County_Feet 20131018 Downloadable Data