Today I was reading a news story and I noted the data came
from Google’s COVID-19
Community Mobility Report The data sets were organized by geographic location and showed the
percent change in visits to places like grocery stores and parks. I downloaded
the data for Oregon and referenced Multnomah County.
About the data:
These reports show how visits and length of stay at different places change compared to a baseline. We calculate these changes using the same kind of aggregated and anonymized data used to show popular times for places in Google Maps.
Changes for each day are compared to a baseline value for
that day of the week:
The baseline is the median value, for the corresponding
day of the week, during the 5-week period Jan 3–Feb 6, 2020.
The reports show trends over several weeks with the most
recent data representing approximately 2-3 days ago—this is how long it takes
to produce the reports.
Note: If the baseline was established in January-February -- a time of cold, wet winter weather in Oregon -- the above graph may represent seasonal visits of parks more than a reaction to COVID.
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