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Chicago
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Author
cocadmin
Description
The following dataset includes "Active Benchmarks," which are provided to facilitate the identification of City-managed standard benchmarks. Standard benchmarks are for public and private use in establishing a point in space. Note: The benchmarks are referenced to the Chicago City Datum = 0.00, (CCD = 579.88 feet above mean tide New York). The City of Chicago Department of Water Management’s (DWM) Topographic Benchmark is the source of the benchmark information contained in this online database. The information contained in the index card system was compiled by scanning the original cards, then transcribing some of this information to prepare a table and map. Over time, the DWM will contract services to field verify the data and update the index card system and this online database.This dataset was last updated September 2011. Coordinates are estimated. To view map, go to https://data.cityofchicago.org/Buildings/Elevation-Benchmarks-Map/kmt9-pg57 or for PDF map, go to http://cityofchicago.org/content/dam/city/depts/water/supp_info/Benchmarks/BMMap.pdf. Please read the Terms of Use: http://www.cityofchicago.org/city/en/narr/foia/data_disclaimer.html.
Category
Buildings
Tags
benchmarks, gis
Rating
Current value: 5 out of 5
Data Provided By
City of Chicago
Source Link
http://www.cityofchicago.org
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Size

  • 500x425

  • 760x646

  • 950x808

Custom Size

425x425 is the minimum size

The Socrata Open Data API (SODA) provides programmatic access to this dataset including the ability to filter, query, and aggregate data. For more more information, view the API docs for this dataset or visit our developer portal

API Endpoint:

Field Names:

BENCHMARK NUMBER
benchmark_number
NORTHING
northing
EASTING
easting
ELEVATION
elevation
LOCATION DESCRIPTION
location_description
LOCATION DESCRIPTION 2
location_description_2
MARK DESCRIPTION
mark_description
YEAR BENCHMARK ELEVATION FIXED
year_benchmark_elevation_fixed
BOOK NUMBER
book_number
LATITUDE
latitude
LONGITUDE
longitude
ESTIMATED LOCATION
estimated_location
Boundaries - ZIP Codes
:@computed_region_rpca_8um6
Community Areas
:@computed_region_vrxf_vc4k
Zip Codes
:@computed_region_6mkv_f3dw
Census Tracts
:@computed_region_bdys_3d7i
Wards
:@computed_region_43wa_7qmu
Historical Wards 2003-2015
:@computed_region_awaf_s7ux

Use OData to open the dataset in tools like Excel or Tableau. This provides a direct connection to the data that can be refreshed on-demand within the connected application.

Socrata OData documentation

Tableau users should select the OData v2 endpoint option.

OData V4 Endpoint:

OData V2 Endpoint:

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