Add geographic data that shows different periods in time

[jackreid]

Different options/questions here:

1. Controls: Just adding more options to the drop down (potentially organized into sub-dropdowns similar to the temporal graphs) vs. adding a new control method such as a slider to move through time.

2. Storing Data: Could pre-produce individual shapefiles for each time period (such as month) and have them referenced, could have still have one shapefile with just more fields, could also have the data stored in a csv and the UI assembles them into either a shapefile or directly into the display live. Not sure what is the best approach.

[jackreid]

I am going to take the approach of having one field per time unit, with a standard naming format that the code will be able to translate into specific time points, this format being NAMEYYMMDD, since that fits the 10 character fieldname limit for shapefiles.

[jackreid]

Initial take on a map slider has been added and merge with master. A working example can be seen in Weekly Mobility in the Santiago context. In general here is how it works.

• To all shp_fields.csv, a new column was added called "Temporal". For all pre-existing fields, this was set to 0. For fields that should be considered temporally and need a slider, the value is 1.
• To have a field be plotted temporally, each point in time should have a separate shapefile attribute. These should be titled in the format NAMEYYMMDD. It is important that the NAME portion is exactly four characters. In the example situation these attributes as WMob200226, WMob200304, WMob200318, etc. The shape_fields.csv should then contain just the NAME portion (in this case, WMob). If you want to ensure that all the maps are visualizing with the same range of colors, regardless of what date they are set to, make sure to specify that in the shp_fields.csv as well. -The slider slides continuously but will "lock in" to the nearest date for which this is a value.

A few things remain to be done:

• Still need to add appropriate comments to code.
• Can probably improve the slider labeling. Right now it is just numeric integers in the YYMMDD format. This could probably be made more legible.