City of Chicago Developers

July 02, 2018 / by Open Data Portal Team / In Open Data , Data Portal

Affordable Rental Housing Location Fix

We discovered today that the Latitude and Longitude columns in the Affordable Rental Housing Developments dataset were flipped, due to an error during the last update in April 2018. This also affected the Location column. We have fixed the error.

June 29, 2018 / by Open Data Portal Team / In Open Data , Data Portal

Food Inspection Violations Changes

On 7/1/2018, the Chicago Department of Public Health’s Food Protection unit will be changing its definition of violations.

Structurally, this will not affect the Food Inspections dataset. The same columns will exist and continue to be populated. The Violations column will still contain the violation number, description, and comments; with separate violations delimited by the pipe character with a space on each side (i.e., “ | ”). However, the actual violations will change substantially so users are advised to test and potentially modify any processes that depend on this column.

While the Results values used will not change, the distribution of values – both for individual businesses and groupings of businesses, up to Chicago as a whole – may change, especially in the period immediately following 7/1/2018. Therefore, we recommend care in interpreting changes in the data. In particular, we advise considering the possibility that apparent changes in long-term trends could be artifacts of this redefinition of violation types.

In order to ease use of the data, we have created two filtered views – one showing inspection records through 6/30/2018 and one showing inspection records from 7/1/2018 forward. As with all datasets, users can also find these views at the bottom of the “primer” page or in the “More Views” section of the “grid view” page. For virtually all purposes, including the SODA API, one can interact with filtered views as if they were datasets in their own right. Naturally, for uses that do not require segmenting the data in this way, users can continue using the Food Inspections dataset, itself.

As always, please contact the City of Chicago Open Data Team at dataportal@cityofchicago.org or @ChicagoCDO with any questions related to using the Data Portal. However, please direct any subject matter questions about food inspections to the Department of Public Health at cdphfood@cityofchicago.org or (312) 746-8030.

June 06, 2018 / by Open Data Portal Team / In Open Data , Data Portal

Changes to City-Owned Land Inventory

On Monday, June 11th we will be making significant changes to the City-Owned Land Inventory data on the data portal. The changes will bring significant improvements to that data set based on a change in the underlying system that tracks and maintains city-owned properties.

May 21, 2018 / by Open Data Portal Team / In Open Data , Data Portal

Missing data in Divvy Bicycle Stations - Historical

Due to an issue with the source data, the Divvy Bicycle Stations - Historical dataset is missing the records between 5/19/2018 6:35 am and 5/20/2018 8:45 am. It is no longer possible to access those values so the gap in the dataset will be permanent.

May 03, 2018 / by Open Data Portal Team / In Open Data , Data Portal

Crime records are missing locations - Resolved

We have discovered that most records in the Crimes - 2001 to present and Crimes - One year prior to present datasets on or after 12/24/2017 have blank values for:

May 03, 2018 / by Open Data Portal Team / In Open Data , Data Portal

Changes to historical traffic tracker datasets

We are making some changes to the datasets that contain historical traffic congestion estimates:

May 02, 2018 / by Open Data Portal Team / In Open Data , Data Portal

End of Smart Green Infrastructure Monitoring Pilot

With the Smart Green Infrastructure Monitoring pilot project coming to an end, we have turned off updates for the dataset that published the sensor observations on a near-real-time basis. This dataset contains almost 14 months of data and will remain on the Chicago Data Portal for historical reference.

April 16, 2018 / by Open Data Portal Team / In Open Data , Data Portal