This six inch pixel resolution color aerial photography was flown between April 16, 2007 and May 7, 2007. The files are provided in JPEG2000, an open format supported by most GIS and CAD software packages. Its intended usage for viewing is 1" = 100. The photography has been orthorectified to meet National Map Accuracy Standards for its capture scale. The images are georeferenced to the Illinois State Plane, Eastern Zone, using the NAD83 HARN horizontal datum. The data set is tiled for dissemination into many separate tiles. Each tile is a section in the Public Land Survey System. The first two digits are the township, the next two are the range and the final two are the section.

This two foot pixel resolution black and white aerial photography was flown on various dates in July 1946 by the United States Geological Survey. They were then scanned by the USGS and georeferenced by Lake County in 2007. This data should NOT be used at a scale larger than 1 inch = 400 feet. Due to the lack of sufficient camera calibration information, errors will increase towards the margin of each underlying photo, although this effect has been minimized by cropping individual photos to make this mosaic. Since these photos were scanned from old film, local distortions (from the media stretching and/or shrinking) may be present as well as fading. Parts of the county were not captured including some areas in Buffalo Grove, Highland Park, and Riverwoods. The date of the flight means that most trees have fully leaf-out canopies, which obscure some ground features. This flight took place during a period of high population growth and land use change. The census population of Lake County was 121,094 in 1940 and 179,097 in 1950, a 48% increase; this photography documents land use in the middle of that decade.

This three inch pixel resolution color aerial photography was flown between March 11, 2017 and April 12, 2017. The files are provided in JPEG2000, an open format supported by most GIS and CAD software packages. Its intended usage for viewing is 1" = 100. The photography has been orthorectified to meet National Map Accuracy Standards for its capture scale. The images are georeferenced to the Illinois State Plane, Eastern Zone, using the NAD83 2011 horizontal datum. The data set is tiled for dissemination into many separate tiles, each of which is 2500 feet on a side.

This three inch pixel resolution color aerial photography was flown between March 11, 2017 and April 12, 2017. The files are provided in JPEG2000, an open format supported by most GIS and CAD software packages. Its intended usage for viewing is 1" = 100. The photography has been orthorectified to meet National Map Accuracy Standards for its capture scale. The images are georeferenced to the Illinois State Plane, Eastern Zone, using the NAD83 2011 horizontal datum. The data set is tiled for dissemination into many separate tiles, each of which is 2500 feet on a side.

This two foot pixel resolution black and white aerial photography was flown on various dates in July 1946 by the United States Geological Survey. They were then scanned by the USGS and georeferenced by Lake County in 2007. This data should NOT be used at a scale larger than 1 inch = 400 feet. Due to the lack of sufficient camera calibration information, errors will increase towards the margin of each underlying photo, although this effect has been minimized by cropping individual photos to make this mosaic. Since these photos were scanned from old film, local distortions (from the media stretching and/or shrinking) may be present as well as fading. Parts of the county were not captured including some areas in Buffalo Grove, Highland Park, and Riverwoods. The date of the flight means that most trees have fully leaf-out canopies, which obscure some ground features. This flight took place during a period of high population growth and land use change. The census population of Lake County was 121,094 in 1940 and 179,097 in 1950, a 48% increase; this photography documents land use in the middle of that decade.

This six inch pixel resolution color aerial photography was flown between July 1, 2008 and August 31, 2008. The files are provided in JPEG2000, an open format supported by most GIS and CAD software packages. Its intended usage for viewing is 1" = 100. The photography has been orthorectified to meet National Map Accuracy Standards for its capture scale. The images are georeferenced to the Illinois State Plane, Eastern Zone, using the NAD83 NSRS2007 horizontal datum. The data set is tiled for dissemination into many separate tiles, each of which is 2500 feet on a side.

This six inch pixel resolution color aerial photography was flown between April 18, 2014 and April 26, 2014. The files are provided in JPEG2000, an open format supported by most GIS and CAD software packages. Its intended usage for viewing is 1" = 100. The photography has been orthorectified to meet National Map Accuracy Standards for its capture scale. The images are georeferenced to the Illinois State Plane, Eastern Zone, using the NAD83 NSRS2007 horizontal datum. The data set is tiled for dissemination into many separate tiles, each of which is 2500 feet on a side.

This six inch pixel resolution black and white aerial photography was flown between April 4, 2005 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. The files are provided in JPEG2000, an open format supported by most GIS and CAD software packages. Its intended usage for viewing is 1" = 100. The photography has been orthorectified to meet National Map Accuracy Standards for its capture scale. The images are georeferenced to the Illinois State Plane, Eastern Zone, using the NAD83 HARN horizontal datum. The data set is tiled for dissemination into many separate tiles. Each tile is a section in the Public Land Survey System. The first two digits are the township, the next two are the range and the final two are the section.

This six inch pixel resolution black and white aerial photography was flown between April 4, 2005 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. The files are provided in JPEG2000, an open format supported by most GIS and CAD software packages. Its intended usage for viewing is 1" = 100. The photography has been orthorectified to meet National Map Accuracy Standards for its capture scale. The images are georeferenced to the Illinois State Plane, Eastern Zone, using the NAD83 HARN horizontal datum. The data set is tiled for dissemination into many separate tiles. Each tile is a section in the Public Land Survey System. The first two digits are the township, the next two are the range and the final two are the section.

This six inch pixel resolution color aerial photography was flown between July 1, 2008 and August 31, 2008. The files are provided in JPEG2000, an open format supported by most GIS and CAD software packages. Its intended usage for viewing is 1" = 100. The photography has been orthorectified to meet National Map Accuracy Standards for its capture scale. The images are georeferenced to the Illinois State Plane, Eastern Zone, using the NAD83 NSRS2007 horizontal datum. The data set is tiled for dissemination into many separate tiles, each of which is 2500 feet on a side.