I have a problem where I need to display a choropleth map with a time slider. I have seen many examples of time slider implementations with CartoDB Torque as well as with mapbox, but I can't find any method of doing this for larger polygon datasets.
I know that I can add a layer for each of the points in the time series, then switch them on and off based on the position of a slider bar. This falls apart for the following reasons:
1) As the number of time steps increases, the number of layers increases. This creates some overhead in the map.
2) We currently create tilesets for our shape information so we can display the appropriate number of points on the polygon boundary at different zoom levels. Because of this, the time series data is transferred multiple times as the user pans and zooms across the map.
There are a number of nearly relevant posts I've reviewed but none lead me to a solution where I can transfer the "metadata" file to the client once and then attach it to the visible polygons for styling.