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The City of Bloomington acquired these high-resolution black-and-white orthophotos in April of 1998. This data set covers the Bloomington area. Additional base map layers are available for download from the City of Bloomington .
This archive includes original images in TIF format and compressed images in MrSID format (*.sid). DMS used three different target compression ratios (1:10, 1:20, and 1:50) to create three MrSID images for each TIF image. All images are in tar archives. The MrSID tar archives include metadata files documenting the compression process. The images are archived in 18 directories corresponding to the CD-ROMs provided by the City.
Coordinate System: IN State Plane West, Zone 1302
Units of Measure: Feet
Horizontal Datum: NAD83
Spheroid: GRS80
Pixel resolution: 0.5 foot
Horizontal positional accuracy is +/- 2.5 feet
File Type: TIFF (23MB/file)
File Type: MrSID (0.5-3MB/file)
