Federal Township Plats - 1840

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.

Data and Resources

Field Value
accessLevel public
catalog_@context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
catalog_conformsTo https://project-open-data.cio.gov/v1.1/schema
catalog_describedBy https://project-open-data.cio.gov/v1.1/schema/catalog.json
identifier https://data-lakecountyil.opendata.arcgis.com/documents/lakecountyil::federal-township-plats-1840
issued 2021-06-17T18:58:43.000Z
landingPage https://data-lakecountyil.opendata.arcgis.com/documents/lakecountyil::federal-township-plats-1840
license https://www.arcgis.com/sharing/rest/content/items/89679671cfa64832ac2399a0ef52e414/data
metadata_type geospatial
modified 2022-03-23T21:02:28.000Z
old-spatial -88.2150,42.1580,-87.7810,42.4930
publisher Lake County Illinois GIS
resource-type Dataset
source_datajson_identifier true
source_hash 625ddce9223118cf7327ab6ed537c263b008cca0
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]]]}
theme {geospatial}
Groups
  • AmeriGEOSS
  • National Provider
  • North America
Tags
  • amerigeo
  • amerigeoss
  • ckan
  • federal-township-plats
  • geo
  • geoss
  • lake-county-illinois
  • national
  • north-america
  • parcels-and-districts
  • recreation-and-conservation
  • united-states
isopen False
license_id other-license-specified
license_title other-license-specified
maintainer LakeCounty_Illinois
maintainer_email gis@lakecountyil.gov
metadata_created 2025-11-20T16:13:00.882349
metadata_modified 2025-11-20T16:13:00.882353
notes <p>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.</p>
num_resources 2
num_tags 12
title Federal Township Plats - 1840