Hydrology Polygons

<div><a target='_blank' href='https://maps.lakecountyil.gov/gisdata/hydrology2007.zip' rel='nofollow ugc noopener noreferrer'><strong>Download In State Plane Projection Here</strong></a><strong>.&nbsp;</strong></div><div>&nbsp;</div><p>This dataset represents the water feature areas (for example, lakes and ponds) of Lake County, Illinois. The features captured in this polygon dataset include: lakes, ponds, detention/retention basins, river/streams/creeks greater than five feet wide, and islands.<br /><br />The data has not been field verified and errors and/or omissions may be present.<br /><br />The names used for the water bodies were collected from a number of sources including: existing datasets, historic maps and/or atlases, <a target='_blank' href='https://www.usgs.gov/us-board-on-geographic-names' rel='nofollow ugc noopener noreferrer'>US Geologic Survey (USGS) Geographic Names Information System (GNIS)</a>, current and historical USGS topographic quadrangle maps, local publications on place names within the county, and platted subdivisions.<br /><br />The dataset was updated to reflect changes in spring 2022. The water features were compiled using softcopy analytical stereoplotters. This dataset should meet National Map Accuracy Standards for a 1:1200 product and it is georeferenced to the Illinois State Plane, Eastern Zone, using the NAD83 HARN horizontal datum.</p>