Open brunosan opened 8 years ago
We have started looking into map based visualizations of the ETA data generated by RRA. To experiment and see what works well, we set up a playground that uses results from three projects from the staging environment.
The challenge will be to design a visualization that works well across projects with very different characteristics. The most important ones that will drive the design choices are:
At this moment, the playground styles each point of origin according to their ETA (color) and population (radius). We've added some options to the map that allow you to change the scale. This will not be a feature of the final visualization, but allows us to make better informed design decisions:
Over the next couple of days we will be doing some more experiments and working on the style. In the meantime, your feedback would be greatly appreciated. Specifically:
cc @Holly-Transport @qli1205 @xijielu @stvno @brunosan
I might too geeky, but a log10 would work well for me. It gives detail close by but also far away.
Another option would be using capped percentiles (color range from 5th-95th so you get a color change for most of the data, and you also account for outliers. I wouldn't use too many color classes.
Human natural breaks could work too: e.g. for Hospitals, schools, ... I'm sure there is a relation of effectiveness with distance in time. ... No idea if those numbers exist or case-base color coding is doable.
For the perspective of the user, I can imagine the money is on the difference of ETA before/after the planned change.
OSRM can create isochrone polylines, but QGIS makes a better work. We should find a way to generate these on the UI