d3.carto.layer drawing routes

[Jim Noss]

For the d3-carto-map library, I am currently plotting points using latitude and longitude. How can I connect two latitude/longitude point with a straight line?

Do I have to make a new layer using the D3 'LineString' type with the coordinate endpoints?

[Mike Bostock]

You should make a GeoJSON LineString feature, yes, assuming that you desire to draw the shortest path between two points on the surface of the sphere, which is a geodesic (and not a straight line).

https://bl.ocks.org/mbostock/5928813

[Jim Noss]

Thanks. would you know how to do this with d3.carto.map?
Not sure if I make a new d3.carto.layer or a feature using 'LineString' with my two lat/long coordinates that are added to a new d3.carto.layer layer.  

[Elijah Meeks]

You would need to add it as a new layer. There are examples of adding new layers from derived features in the wiki. Unfortunately, I don't have the time to support d3.carto anymore, so you might consider looking into a more established web mapping library.

[Jim Noss]

Your d3.carto library is perfect for my needs. Got the lat/Lon points plotted and will create a new layer for the LineString between the coordinates and add to the map.  Thanks

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Jim

[Key West Life]

Looking at Mike's LineString example http://bl.ocks.org/mbostock/5851933 do you have a similar code snippet on how to do the same with the d3.carto library? 

Which layer should I use and does it support the LineString coordinates like in Mike's example?  sorry. a little lost on how to implement the new layer for the LineString coordinates in d3.carto.

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Jim