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| | Aerial Photography: Lake County, IL |
 | | The census population of Lake County was 382,638 in 1970 and 440,372 in 1980, a 15% increase; this photography documents land use in the middle of that decade. |
 | | This aerial photography was flown on April 22nd, 2000, at a negative scale of 1” = 833’, flying at an altitude of 5000 feet. |
 | | This aerial photography was taken on April 4 and April 9, 2005 at a negative scale of 1" = 660' (a scale ratio of 1:7,920) flying at an altitude of 4,500 feet above mean terrain. |
| www.co.lake.il.us /gis/aerial.asp (950 words) |
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