The 2007 digital orthophotography was acquired for all of Milwaukee, Ozaukee, and Waukesha Counties and the southern one-quarter of Washington County. This inventory is available in two file formats:
Digital orthophoto images prepared at 12-inch pixel resolution and one-inch-equals-200-feet scale. Each image covers an area of 10,000 by 10,000 feet on the Wisconsin State Plane Coordinate System.
The color GeoTIFF files described above merged into compressed files in MrSID format. Each image file covers one U.S. Public Land Survey System survey township (about 36 square miles).
More detailed information about 2007 digital orthophotography can be found in the description of 2007 digital products (PDF file) and the 2007 orthophotography metadata.
The 2005 digital orthophotography is available as color and black-and-white images. The various file types and formats include:
Digital orthophoto images prepared at 12-inch pixel resolution and one-inch-equals-200-feet scale for Kenosha, Ozaukee, Racine, Walworth, and Washington Counties. The images were prepared at 6-inch pixel resolution and one-inch-equals-100-feet scale for Milwaukee and Waukesha Counties. Each image covers an area of 5,000 by 5,000 feet on the Wisconsin State Plane Coordinate System.
The color GeoTIFF files described above merged into compressed files in MrSID format. Each image file covers one U.S. Public Land Survey System survey township (about 36 square miles).
Digital orthophoto images prepared at 12-inch pixel resolution and one-inch-equals-200-feet scale for the entire seven-county Southeastern Wisconsin Region. Each image covers an area of 10,000 by 10,000 feet on the Wisconsin State Plane Coordinate System.
The black-and-white GeoTIFF files merged into compressed files in MrSID format. One set of image files is organized by U.S. Public Land Survey System survey township. Each image in this series covers one USPLSS survey township (about 36 square miles). A second set of MrSID image files is organized by county, with one file covered each of the seven counties in the Region.
More detailed information about 2005 digital orthophotography can be found in the description of 2005 digital products (PDF file), 2005 project areas and files (PDF file), and the 2005 orthophotography metadata. Samples of color and black-and-white orthophotos are included in the 2005 orthophoto samples document (PDF file).
Digital aerial orthophotos for the year 2000 are available in a number of different image formats and aerial coverages. Files available from the year 2000 inventory include:
Digital orthophoto images prepared for use at 1:4,800 scale (one inch equals 400 feet), with two-foot pixel resolution. Each image covers a nominal four-square-mile area, or four U.S. Public Land Survey System sections. This series of images also includes accompanying digital files containing map sheet and control survey information.
Digital orthophoto images prepared for use at 1:2,400 scale (one inch equals 200 feet), with one-foot pixel resolution. Each image covers an area of 5,000 by 5,000 feet on the Wisconsin State Plane Coordinate System. This series of images does not include accompanying files with ancillary text or vector information.
Year 2000 orthophotography files are available in two different MrSID-format compressed file products. The 400-scale image files have been merged into single MrSID files covering individual counties. The 200-scale files have been merged into single MrSID files covering individual U.S. Public Land Survey System townships.
More detailed information about the 2000 digital orthophotos can be found in the description of 2000 digital orthophotography products (PDF file) and in the 2000 orthophoto metadata. Samples of 400-scale and 200-scale orthophotos can be found in the aerial orthophoto samples document (PDF file). You can also use the Orthophoto Viewer to see how the various image files are organized by coverage area.
The Commission conducted its first digital orthophotography inventory in 1995. The black-and-white image files are available in two file formats:
Digital orthophoto images prepared for use at 1:4,800 scale (one inch equals 400 feet), with two-foot pixel resolution. Each image covers a nominal four-square-mile area, or four U.S. Public Land Survey System sections. This series of images also includes accompanying digital files containing map sheet and control survey information.
Year 1995 orthophotography files are available in two different MrSID-format compressed file products. The image files have been merged into single MrSID files covering individual U.S. Public Land Survey System townships, and have also been merged into single MrSID files covering entire counties.
More detailed information about the 1995 digital orthophotos can be found in 1995 Digital Orthophoto File Naming Convention (PDF file) and in the 1995 orthophoto metadata.