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wklumpen / equity-pulse-web

Equity Pulse is a web application and visualization platform using Flask+D3 to support equity and access calcualtions for TransitCenter/SSR/SF2 Work
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Travel time on transit vs. car to hospitals, stores, schools, etc. -- pin bin values? #95

Closed mlbtc closed 3 years ago

mlbtc commented 3 years ago

This was a prior request so I'm not sure if it got lost - reissuing here: Legend for Transit-Car ratios of travel times as set, rather than percentile-based, bins: <1, <2, <3, <4, >4. I think it's easy to understand what equal travel time vs. travel time that's 4x as long means, and there is a certain value to identifying the areas that have consistently competitive transit service - as fast or faster than traveling by car.

mlbtc commented 3 years ago

related to this, the DC Economic Region travel time to hospital by car vs. transit is showing less than -1 for the top 20% of block groups. What does -1 mean in this context?

http://ec2-3-21-125-103.us-east-2.compute.amazonaws.com:5000/map/dc?key=hospitals_M_t1_PM_autoY_fareN&zone=er&date=2021-02-21&demo=none

wklumpen commented 3 years ago

Partial duplicate of #24.

The second comment sounds like a bug in the data. I'll treat this issue as the bugfix, and we can continue the discussion on fixed bins at Issue #24.

wklumpen commented 3 years ago

Bug was an issue with using unfiltered data for the legend labels (the colors were correct). I also reconfigured the label indicating the values are ratios to make the legend more friendly. Will be reflected in v.1.0.0

Edit: For posterity, Values of (-1) indicate "unknown" travel time (i.e. the maximum value was exceeded, so it is somewhere above the upper threshold).