I added a table below the map that contains some additional information. It
isn't very intuitive and it's hard to describe in the short column headings
in the table (I'm open to suggestions) but I'll leave a couple of notes
here and add some explanation to the production page later.
In the table, I have totals for each of the counties involved in the
selected commuter flows. This includes a "median" commuting distance for
commuters who live in the county and a median commuting distance for
commuters who work in the county.
In addition at the right side of the table, there are a couple of
- the "% This County" shows the % of that county's residents are part of
the main selected county's workers (if "workplace" is the selected view)
the % of that county's workers who are part of the main selected county's
residents (if "residence" is the selected view.)
- the % Selected County shows the % of the selected commuters who
live/work in this county (depending on the selected view), so these should
add to 100%.
The median distances are calculated using the same number that drives the
distance range criteria: the distance between the center of each census
tract. Thus, intra-tract commutes count as 0. By sorting the tracts by
distance, I found the tract-tract flow that contained the median commuter
(if 1,000 commuters, the 500th commuter) and used that flow distance as the
Anyway, if nothing else the totals on the left side of the table will show
you what I have as the total workers/residents in my tables.
Thanks and let me know if any suggestions or questions,
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