Fly Dane 2000 - Deliverables

1-foot Resolution Imagery:   Orthophotos combine the image characteristics of a photograph with the geometric qualities of a map.  The Fly Dane 2000 one-foot resolution digital orthophotos are a mosaicked raster data set derived from black and white aerial photographs.  The aerial photography was acquired in the spring of 2000 at a scale of 1:20,000 (1"=1666').  The aerial photographs were used to create 1"=200' scale digital orthophotos at one-foot ground resolution covering all of Dane County, projected to the Dane County Coordinate System, and were divided into 313 four square mile tiles.     Coverage Area:   Available across all of Dane County.   6-inch Resolution Imagery:   Orthophotos combine the image characteristics of a photograph with the geometric qualities of a map.  The Fly Dane 2000 six-inch resolution digital orthophotos are a mosaicked raster data set derived from black and white aerial photographs.  The aerial photography was acquired in the spring of 2000 at a scale of 1:10,000 (1"=833').  The aerial photographs were used to create 1"=100' scale digital orthophotos at six-inch ground resolution covering the majority of the urbanized areas in Dane County and consists of 318 one square mile tiles.     Coverage Area:   The 6-inch resolution imagery was developed over most of the urbanized areas of the county.  The areas colored in green show the coverage of this imagery.     4-Foot Contours:   The digital four-foot contours are a vector data set developed from a ten-foot spaced grid, digital elevation model (DEM), with two-foot vertical accuracy.  The contour data meets National Map Accuracy standards.       Coverage Area:   Available across all of Dane County.   Terrain Data:   A digital elevation model (DEM) is a representation of a topographic surface.  The DEM was developed from mass points and breaklines photogrammetrically collected from 1"=1666' scale aerial photography flown in spring of 2000 as part of the Fly Dane 2000 Project.  The DEM is a raster data set in ESRI GRID format with an X, Y, Z value located at the center of each 10ft. by 10ft. cell.  The DEM has a ten-foot grid spacing with two-foot vertical accuracy.  The DEM supports the development of four-foot contours at National Map Accuracy Standards.     Coverage Area:   Available across all of Dane County.