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This is a Non-Federal dataset covered by different Terms of Use than

Federal Township Plats - 1840

Metadata Updated: September 1, 2022

This dataset is a derivative of the Federal Township Plats for Lake County, Illinois, the originals of which were captured on a high-resolution scanner by the Illinois State Archives. The Lake County GIS/Mapping division received permission to acquire and georeference these images using ERDAS Imagine. Since the source material was distorted in an unsystematic way due to the rigors of time and points of reference were abundant, the rubber sheeting model in Imagine with the linear option was chosen to rectify the images. The USGS delineations of the section corners for their 1:24,000 scale 7.5 minute quadrangles were chosen as a base because they are a publicly available resource that exists for the entire state of Illinois should any other counties or organizations wish to make a similar product. This final product consists of a mosaic of the townships in Lake County also created in Imagine using their mosaic tool with each township being cropped to its border in the process.

Access & Use Information

Public: This dataset is intended for public access and use. Non-Federal: This dataset is covered by different Terms of Use than License: See this page for license information.

Downloads & Resources


Metadata Created Date September 1, 2022
Metadata Updated Date September 1, 2022

Metadata Source

Harvested from Open data from Lake County, Illinois

Additional Metadata

Resource Type Dataset
Metadata Created Date September 1, 2022
Metadata Updated Date September 1, 2022
Publisher Lake County Illinois GIS
Data First Published 2021-06-17T18:58:43.000Z
Data Last Modified 2022-03-23T21:02:28.000Z
Category geospatial
Public Access Level public
Metadata Context
Schema Version
Catalog Describedby
Harvest Object Id 7c7b2f50-efac-4bb5-934c-c403aac2d023
Harvest Source Id e2c1b013-5957-4c37-9452-7d0aafee3fcc
Harvest Source Title Open data from Lake County, Illinois
Homepage URL
Metadata Type geospatial
Old Spatial -88.2150,42.1580,-87.7810,42.4930
Source Datajson Identifier True
Source Hash b427db76b09782f6f97b14ca9ff808e40aa9bb84
Source Schema Version 1.1
Spatial {"type": "Polygon", "coordinates": -88.2150, 42.1580, -88.2150, 42.4930, -87.7810, 42.4930, -87.7810, 42.1580, -88.2150, 42.1580}

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