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O/D visualizations: centroid totals shifted one time period over compared to the data #530

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@chunhochow

I'm producing O/D visualizations using: https://docs.simwrapper.app/docs/aggregate-od , using the simwrapper.app

The CSV is something like the following

origin;destination;EA;AM;MD;PM;EV;ON
A;A;7.6;25.2;20.3;34.4;4.3;0.0

So, e.g., there should be 7.6 trips from A to A in the EA, 25.2 trips in the AM, ..., 4.3 trips in EV, 0 trips in ON.
However, the centroid totals (in the yellow circles) show: 0 trips in the EA, 8 trips in the AM, 25 trips in MD, ..., 4 trips in the ON.

As you can see, everything is shifted over by one time period.

The line thicknesses seem to be correctly corresponding to each time period though, so the issue is just with the centroid totals.

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