- Flown April 13th and April 26th, 2002
- Usage Scale 1” = 100’
- Black and white
- Illinois State Plane, Eastern Zone, NAD 83 horizontal datum, HARN
- MrSID image file format
- Lake County funded project
This aerial photography was taken between April 13 and April 26, 2002 at a negative scale of 1" = 660' (a scale ratio of 1:7,920) flying at an altitude of 3,960 feet above mean terrain. Its intended usage scale for viewing is 1" = 100' (one inch on the photograph equals one hundred feet on the ground). The photography has been orthorectified to meet National Map Accuracy Standards for its negative scale.
This digital aerial photo product consists of a single, countywide image in an image compression format called MrSID.
For more information about the MrSID file format visit the Lizardtech website.
A standalone MrSID viewer is included on each compact disc, which can be installed on a personal computer to look at the image. Documentation for the viewer is included on the compact disc.
Lizardtech offers free extensions for CAD, GIS and image software at their website.
2002 aerial photo sample, showing the intersection of state highways 21 and 60.