Processing and accessing mobility data

[ffinger]

Google has started providing mobility statistics derived from mobility data from smartphone users: https://www.google.com/covid19/mobility/.

Description

For public health officials and researchers it will be crucial to be able to follow the evolution of those mobility indicators through time and to integrate them in automated analyses. A means to automatically access those indicators (and their evolution) from within R code is thus needed.

1. See if google provides an API to automatically access indicators
   • If yes: go to 2.
   • If no, examine pdf reports to see if indicators can be extracted automatically
2. provide an R package that makes the indicators available from within R in tabular form through API or by extracting values from pdf reports

Output

The proposed output is a data frame in long format with columns for country, date, indicator and values.

Impact

This will allow to follow mobility indicators automatically from within R code, which will allow for analysis of (for example) the impact of mobility reduction on transmissibility.

Proposed Timeline

First version of package available on Apr 10.

Focal Point

@ffinger

Links

Could be integrated into https://github.com/epiforecasts/NCoVUtils or live as a separate package.

[PaulC91]

data extraction from pdf to csv with python: https://github.com/vitorbaptista/google-covid19-mobility-reports

[noamross]

These mobility data are generally far more useful as a time series, especially going backwards, so that modelers can calibrate their models to the change in mobility that occurred over the past month(s). So the task includes either

• Digitizing the graphs from these data
• Extracting data from a similar source with historical values. Cuebiq has published a dashboard that includes weekly mobility changes for U.S. counties but raw data is not available: https://www.cuebiq.com/visitation-insights-covid19/

[jennybc]

If this becomes an Google API wrapping project, I might be of use. Unfortunately, it currently looks like a PDF parsing project, at least re: data ingest.

[PaulC91]

@jennybc yeah I've heard there is 0% chance of google opening an API to this unfortunately. @noamross as far as I can tell the headline figure accompanying each graph is the latest figure on the time axis, so it would just be a case of extracting this every day to start to build a time-series.

[noamross]

I note there's an R workflow for parsing the PDF using pdftools, as well, but only for the headline figures: https://github.com/mattkerlogue/google-covid-mobility-scrape

[PaulC91]

full extraction including trend lines in R! https://github.com/nacnudus/google-location-coronavirus

[david-jankoski]

+1 for this great repo and initiative! searching if google's api is public i stumbled upon this https://github.com/pastelsky/covid-19-mobility-tracker might be useful - though i see @PaulC91 has a nice working version of it in R 👏 awesome!

[noamross]

If someone could extend @nacnudus's repo/script/data above to include the county-level U.S. data it would be an enormous help.

[nacnudus]

See also this one by the UK Office for National Statistics. https://github.com/datasciencecampus/mobility-report-data-extractor

[nacnudus]

Data problems have been fixed :crossed_fingers: https://github.com/nacnudus/google-location-coronavirus

[ffinger]

The solution proposed by @nacnudus seems to solve the issue. Thanks a lot!

Remaining:

• extension of county level us data as mentioned by @noamross above
• check if the solution still works on googles next release of mobility reports

Anything else?

[nacnudus]

US counties now in the "region" file https://github.com/nacnudus/google-location-coronavirus/blob/master/2020-03-29-region.tsv. It hasn't been checked extensively though, so take care.

[ffinger]

Great, thanks a lot @nacnudus.

[ffinger]

@nacnudus, is your solution still working with the new mobility reports published yesterday? I haven't seen any movement on your repo. If so I will assume this issue to be solved.

[nacnudus]

@ffinger, it seems to have run fine on the new reports.

[ffinger]

Brilliant, will close the issue then.