Cook County GIS Dept index of the Cook County GIS township maps.

Shapefile showing boundaries of townships in 1851. Features based upon modern GIS maps of township boundaries and then adjusted to match information from Flower and Mendel's 1861 property map of Cook County, Illinois.

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

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

Cook County GIS Dept map of Wheeling 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.

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

Cook County GIS Dept map of Worth & Lake Townships in a pdf format. Includes streets and municipalities.

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

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

Cook County GIS Dept map of Leyden, Norwood Park & Jefferson Townships in a pdf format. Includes streets and municipalities.

A map highlighting damage to the Cedar Rapids, IA, area from the August 10, 2020, Midwest Derecho event. Polygons showing maximum estimated wind gusts. Points showing specific areas of damage and estimated wind speeds.Point locations are from National Weather Service damage surveys or information shared with the National Weather Service after the event. Polygon wind contours represent an estimate of maximum wind gusts produced using a combination of weather station observations, damage reports, and storm surveys.This map is used by the August 10, 2020, Midwest Derecho story map:https://storymaps.arcgis.com/stories/f98352e2153b4865b99ba53b86021b65/

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

Cook County GIS Dept map of Palos & Lyons Townships in a pdf format. Includes streets and municipalities.

Cook County GIS Dept map of Hyde Park & Lake Townships in a pdf format. Includes streets and municipalities.

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

The Public Land Survey System (PLSS) is the way land in the United States is subdivided, it forms the foundation of Cook County's cadastral system for identifying and locating land records. Tax parcels are identified using township and section notation, in a modified format. The PLSS serves as a way for users to navigate the parcel geodatabase. This PLSS feature data set is intended to correspond to tax pages on the Cook County Tax Maps. They should not be used for measurement or surveyor purposes. In addition, the parcel attributes PINA (area/township) and PINSA (subarea/section) do not necessarily correspond to the PLSS township and section polygon in which a given parcel resides. The PLSS data is modeled as a single composite network coverage that encompasses townships (area), sections (subarea), quarter sections, and half quarter section. Tax map pages, which typically correspond to half quarter sections (in an east-west split), are modeled as a region subclass in the LANDFABRIC layer. If an indigenous people's reserve was present on the tax map, it was digitized to create subpolygons of the half-quarter section, and those polygons were attributed with the name of the reserve. Within this PLSS data set, a half-quarter section is the smallest polygon unit, except in cases where an Indigenous People's Reserve line is present. The cadastral data for Cook County have previously not been digital nor automated. This project is the initial automation for this information. This database was designed to represent a continuous, non-overlapping spatial database accounting for all land area in Cook County.The PLSS is updated as needed.

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

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

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