Please see the individual layer below to access the detailed metadata.In order to support science-based water resource management, a systematic effort was undertaken to characterize the nature and function of the hydrogeology in Jo Daviess County, Illinois (County), which is a karst area. Karst is a geologically and hydrologically integrated or interconnected and self-organizing network of landforms and subsurface large-scale, secondary porosity created by a combination of fractured carbonate bedrock, the movement of water into and through the rock body as part of the hydrologic cycle, and physical and chemical weathering (Panno, S.V. et al, 2017). Springs, cover-collapse sinkholes, crevices, and caves are among the defining features of a karst terrain. Examples of all these features are found within the County and have been characterized by scientists at the Illinois State Geological and Water Surveys, Divisions of the Prairie Research Institute, University of Illinois at Urbana-Champaign. Cover-collapse sinkholes within the County are developed in thin, fine-grained sediments above three bedrock formations: Ordovician-age Galena Dolomite and Maquoketa Shale, and Silurian-age dolomite. Sinkholes developed within the Galena Dolomite and Silurian dolomite form over crevices that can be as wide as 1 meter (m). Sinkholes developed within sediment overlying Galena Dolomite are typically the smallest ranging from about 1 m in diameter and less than 1 m deep to 5 m in diameter and less than 2 m deep. Sinkholes within sediment overlying Maquoketa Shale are much larger and include collapse of the shale as well. Maquoketa Shale hosted sinkholes are most often found in areas adjacent to the Apple River in the eastern part of the County where the water table has been lowered by discharge to the river. These sinkholes can be 8 m in diameter and 6 m deep, and are unique in that both soil and shale are collapsing into crevices within the underlying Galena Dolomite. Sinkholes within sediment overlying Silurian-age dolomite are typically the largest and can be up to 10 m wide and 7 m deep. These sinkholes typically form en echelon that follow the alignments of meter-wide linear crevices within the underlying dolomite. Panno, S.V., Donald E. Luman, and Dennis R. Kolata. Characterization of karst terrain and regional tectonics using remotely sensed data in Jo Daviess County, Illinois. Circular 589, Illinois State Geological Survey, Prairie Research Institute, University of Illinois Urbana-Champaign, 2015. https://www.isgs.illinois.edu/maps/county-maps/karst-terrain/jo-daviessPanno, S.V., Philip G. Millhouse, Randy W. Nyboer, Daryl Watson, Walton R. Kelly, Lisa M. Anderson, Curtis C. Albert, and Donald E. Luman. Guide to the Geology, Hydrogeology, History, Archaeology, and Biotic Ecology of the Driftless area of Northwestern Illinois, Jo Daviess County.Illinois State Geological Survey Guidebook 42, 2016. https://www.isgs.illinois.edu/publications/gb042Panno, S.V., Donald E. Luman, Walton R. Kelly, Timothy H. Larson, and Stephen J. Taylor. Karst of the Driftless Area of Jo Daviess County, Illinois. Circular 586, Illinois State Geological Survey, Prairie Research Institute, University of Illinois Urbana-Champaign, 2017. https://isgs.illinois.edu/maps/county-maps/karst-terrain/jo-daviess-0

Download In State Plane Projection Here. This is our working version of the Lake County boundary. Although technically the county's eastern border extends eastward into Lake Michigan to the state line where Illinois meets Michigan, we routinely use the Lake Michigan shoreline as our eastern boundary for mapping purposes. The north, west and south boundaries are based on a compilation of survey data which aligns well, but not perfectly, with the border as mapped by neighboring counties and the State of Wisconsin, which forms the northern boundary of the county. Update Frequency: This dataset is updated on a weekly basis.

Cook County GIS Dept map of Hanover Township in a pdf format. Includes streets and municipalities.

Vector polygon map data of property parcel line from Rockford, Illinois containing 126,327 features.

Property parcel GIS map data consists of detailed information about individual land parcels, including their boundaries, ownership details, and geographic coordinates.

Property parcel data can be used to analyze and visualize land-related information for purposes such as real estate assessment, urban planning, or environmental management.

Available for viewing and sharing as a map in a Koordinates map viewer. This data is also available for export to DWG for CAD, PDF, KML, CSV, and GIS data formats, including Shapefile, MapInfo, and Geodatabase.

Suburban Cook County Election Precincts maintained by the Cook County Clerk's Election Department. Not included are the City of Chicago Election Precincts which are maintained by the Chicago Board Of Elections. An ArcGIS Service is available at: https://hub-cookcountyil.opendata.arcgis.com/datasets/0e91b48d49744346be343f0cb99d25bd_0/

Voting District Project of the Census Redistricting Data Program commenced in Summer of 2017 to establish the state’s Voting precincts within the bureau’s tiger geography. The initial phase used the Bureau’s GUPS plugin for QGIS to update the districts from the 2010 round, and then a secondary verification phase took place to ensure the updated voting districts were properly enacted into Tiger geographic files. A post census effort took place in December 2021 to cut the number of precincts down countywide to 1430. Election Data Services conducted Phase 2 of the Census Redistricting Data Program for the State of Illinois, as well as implemented changes made post census in Cook County.

Precincts are updated as needed before every election by the Cook County Clerk's Elections Department.

Cook County GIS Department map of municipal boundaries in Cook Cook County, Illinois in PDF format. Includes major streets, waterbodies, rail, Cook County Forest Preserve, and municipal boundaries.

The 2023 cartographic boundary KMLs are simplified representations of selected geographic areas from the U.S. Census Bureau's Master Address File / Topologically Integrated Geographic Encoding and Referencing (MAF/TIGER) Database (MTDB). These boundary files are specifically designed for small-scale thematic mapping. When possible, generalization is performed with the intent to maintain the hierarchical relationships among geographies and to maintain the alignment of geographies within a file set for a given year. Geographic areas may not align with the same areas from another year. Some geographies are available as nation-based files while others are available only as state-based files. County subdivisions are the primary divisions of counties and their equivalent entities for the reporting of Census Bureau data. They include legally-recognized minor civil divisions (MCDs) and statistical census county divisions (CCDs), and unorganized territories. In MCD states where no MCD exists or no MCD is defined, the Census Bureau creates statistical unorganized territories to complete coverage. The entire area of the United States, Puerto Rico, and the Island Areas are covered by county subdivisions. The generalized boundaries of legal MCDs are based on those as of January 1, 2023, as reported through the Census Bureau's Boundary and Annexation Survey (BAS). The generalized boundaries of all CCDs, delineated in 21 states, are based on those as reported as part of the Census Bureau's Participant Statistical Areas Program (PSAP) for the 2020 Census.

Download In State Plane Projection Here. These address points were developed for a myriad of uses including general public geocoding in Lake County web sites and NG-911 emergency dispatch. All addresses are reviewed on a monthly basis against the United States Post Office delivery database to ensure that they are still active. New addresses are added at this time or earlier if they are made known to Lake County GIS by local data partners. Attributes DiscrpAgID through Elev reflect the NENA NG-911 / State of Illinois GIS Data model. Additional local data fields have also been included. The fields LSt_PreDir, LSt_Name, LSt_Type and LSt_PosDir are formatted according to United States Postal Service standards.Update Frequency:This dataset is updated on a weekly basis.

Download In State Plane Projection Here The Lake County Wetland Inventory (LCWI) maps natural and artificial wetlands meeting definitions established by the federal agencies who work with the Lake County Geographic Information System staff to periodically review and update it. These agencies include the United States Environmental Protection Agency, the U.S. Fish and Wildlife Service, the USDA Natural Resources Conservation Service and the United States Army Corps of Engineers. The 1989 federal wetland delineation standards for offsite wetland mapping are used. This data was last published in March of 1993. This update includes changes to the previous version of LCWI including: adjust current wetland boundaries to omit development, including roads; to fine tune boundary placement where that was intended by the original delineation, in some cases, adjust the wetland to photographic features / signature; delete wetlands which the committee decided were mapped in error - for example, trees which were mistaken for wet areas; create polygons for newly delineated artificial wetlands; and newly delineated wetlands or farmed wetlands caused by the continued deterioration of the agricultural drain tile system and increased runoff due to urbanization. The LCWI is a useful tool for general planning and review purposes, but it does not take the place of an on-site delineation by a certified wetland specialist. High resolution (1" = 100') orthorectified aerial imagery captured in April 2002 was used as the base for this update. Other data used as reference for this update include: 2004 SOIL SURVEY GEOGRAPHIC (SSURGO) DATABASE FOR LAKE COUNTY, IL - U.S. Department of Agriculture, Natural Resources Conservation Service; HYDROLOGY2002 - Lake County GIS/Map Division; 2' topography (CONTOURS) - Lake County GIS/Map Division; and various years of historical aerial photography for clarification. By using the more recent higher resolution photography, the resulting updated wetland boundaries are more accurate then the original boundaries published in 1993.

Village of Beach Park

description: The Digital Flood Insurance Rate Map (DFIRM) Database depicts flood risk information and supporting data used to develop the risk data. The primary risk classifications used are the 1-percent-annual-chance flood event, the 0.2-percent-annual-chance flood event, and areas of minimal flood risk. The DFIRM Database is derived from Flood Insurance Studies (FISs), previously published Flood Insurance Rate Maps (FIRMs), flood hazard analyses performed in support of the FISs and FIRMs, and new mapping data where available. The FISs and FIRMs are published by the Federal Emergency Management Agency (FEMA). The file is georeferenced to earth's surface using the UTM projection and coordinate system. The specifications for the horizontal control of DFIRM data files are consistent with those required for mapping at a scale of 1:12,000.; abstract: The Digital Flood Insurance Rate Map (DFIRM) Database depicts flood risk information and supporting data used to develop the risk data. The primary risk classifications used are the 1-percent-annual-chance flood event, the 0.2-percent-annual-chance flood event, and areas of minimal flood risk. The DFIRM Database is derived from Flood Insurance Studies (FISs), previously published Flood Insurance Rate Maps (FIRMs), flood hazard analyses performed in support of the FISs and FIRMs, and new mapping data where available. The FISs and FIRMs are published by the Federal Emergency Management Agency (FEMA). The file is georeferenced to earth's surface using the UTM projection and coordinate system. The specifications for the horizontal control of DFIRM data files are consistent with those required for mapping at a scale of 1:12,000.

Download In State Plane Projection Here. Boundaries of designated high quality ADID wetlands established as a result of a formal process under the direction of the U.S. Environmental Protection Agency. Part 404(b)(1) of the Clean Water Act authorizes the USEPA and the US Army Corps of Engineers to identify in advance of specific permit requests aquatic sites which will be considered as areas generally unsuitable for disposal of dredged or fill material. This process is called an Advanced Identification or ADID. Under the ADID process identification of an area as generally unsuitable for fill does not prohibit applications for permits to fill in these areas. Therefore the ADID designation of unsuitability is advisory not regulatory. An ADID designation lets a potential applicant know in advance that a proposal to fill such a site is not likely to be consistent with the 404(b)(1) guidelines, and the USEPA will probably request permit denial. ADID wetland information is also useful in watershed planning, land use planning, public land acquisition programs, natural resource studies and other purposes. The wetland selection criteria and methodology are documented in the publication entitled "Advanced Identification (ADID) Study, Lake County, Illinois. Final Report, November 1992" which is included in this download. Boundaries were delineated by the ADID project team on orthophotograph background with an intended usage scale of 1" = 400', a scale ratio of 1:4800.

This dataset contains address points for addresses in Cook County. An ESRI Service is available at: https://hub-cookcountyil.opendata.arcgis.com/datasets/5ec856ded93e4f85b3f6e1bc027a2472_0/

Data is updated and maintained by Cook County GIS.

County Board District 2

Cook County GIS Dept map of Thornton Township in a pdf format. Includes streets and municipalities.

Cook County GIS Dept map of Lake View, North & West Townships in a pdf format. Includes streets and municipalities.

A map showing the location of Champaign County, Illinois, USA.

Cook County GIS Dept map of Commissioner District 3.

Download In State Plane Projection Here. Municipal boundaries are based on annexations, court orders and other legal documents filed in the office of the Recorder of Deeds. Mapping is based on the legal descriptions from those documents, which relate to existing parcel boundaries or to the underlying PLSS. Important attributes include "Type" which contains an "I" if the polygon represents an incorporated area, and a "U" if unincorporated. The municipality name for "I" type polygons is included in the attribute "NAME1." Update Frequency: This dataset is updated on a weekly basis.

Cook County GIS Dept map of Berwyn, Cicero, Oak Park & Stickney Townships. West and South Towns in a pdf format. Includes streets and municipalities.