Add day/night shading to Sensor map

[keenanjohnson]

From a Ribbit Network user: It would be great to have some sort of night/ day shading of the graph background, so you know where you are at in time.

[spestana]

Here's an implementation with leaflet alone (not dash): https://github.com/joergdietrich/Leaflet.Terminator

[benorloff]

To clarify, which would be better for user experience?

1. To display night and day regions on the global map
2. Render the global map in either 'light' or 'dark' mode based on the user's location and timestamp

If #1, then I think adding overlays per @spestana 's suggestion makes sense.

If #2, I think it would just be a matter of dynamically updating the map style of the tileset based on geolocation and timestamp.

[spestana]

I have a work in progress on a branch here with some promising results now, but it still needs some fine tuning with the map display.

It's a dash-leaflet (python) version of the plain leaflet (js) code here: https://github.com/joergdietrich/Leaflet.Terminator

[keenanjohnson]

oh wow! This is awesome @spestana ! I continue to be impressed with the capabilities of dash / plotly.