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Ohio DOQQs
The coverage is statewide. Files are MrSid compress in Ohio
State Plane.
Size: 6.5 GB
The State of Ohio is covered by 3084 DOQQs which are based
on black and white National Aerial Photography Program
(NAPP) photography, most of which was acquired between
1993 and 1999.
The DOQQs in native format (band interleaved by line (BIL),
are stored in UTM coordinates, Meters, NAD 83. The DOQQs
meet national map accuracy standards for 1:12,000 Scale
(+/- 33 feet). Each DOQQ in native format is roughly 45
megabytes.
The enhanced DOQQs have been projected to the Ohio State
Plane Coordinate System and are available in Multi-resolution
Seamless Image Database (MrSID) image format. Each DOQQ
in MrSID image format is less than 2 megabytes which is less
than 5% of the native file size. The MrSID GeoViewer
(Windows 95/98/NT) or MrSID Stand Alone Viewer (Windows
95/98/NT, Macintosh, Unix) is required to view the enhanced
DOQQs. These software packages are available free from
LizardTech http://www.lizardtech.com
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