December 11, 2018 / by Open Data Portal Team / In Open Data , Data Portal

311 Dataset Changes

The City of Chicago is getting ready launch its new 311 system this month.

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November 19, 2018 / by Open Data Portal Team / In Open Data , Data Portal

Public Chauffeurs dataset changes

Due to a change in the source system, there will be some minor effects to the Public Chauffeurs dataset this evening (11/19/2018) and tomorrow morning:

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October 15, 2018 / by Open Data Portal Team / In Open Data , Data Portal

Historical Congestion Estimates by Segment Dataset Is Not Updating - Resolved

The Chicago Traffic Tracker - Historical Congestion Estimates by Segment - 2018-Current dataset has not updated since 10/1/2018. We just became aware of the problem on 10/13/2018 and do not have an estimated fix time. We also do not know yet if the missing time slices will be recoverable or if there will be a permanent gap in the data.

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October 05, 2018 / by Open Data Portal Team / In Open Data , Data Portal

New Water FOIA Log URL

We recently had a problem with the Department of Water FOIA Request Log dataset. We have restored the data but were not able to keep the previous URL or dataset ID (“4x4” at the end). The dataset is now at https://data.cityofchicago.org/FOIA/FOIA-Request-Log-Water/p4j4-pzyn.

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September 13, 2018 / by Open Data Portal Team / In Open Data , Data Portal

Choropleth Maps of Datasets with Multiple Location Columns

We recently became aware of a technical quirk that affects our dashboard views if the underlying tabular dataset has more than one column of Location or Point type (generically referred to as “Location” in this post). We most commonly have this situation for travel-related datasets where there is both a starting and ending location.

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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.

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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.

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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.

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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.

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