[soperj]

this is unbelievably relevant for me right now, because this is exactly what I was looking to implement. Any gotchas? Lessons learned?

[ctcliff]

The geographic rendering APIs tend to be incompatible with the graphing algorithms and data structures. It's better to optimize your data on the server for algorithmic simplicity and convert to a render-friendly format at render time.

Also, immutability is great when you're juggling 1000s of lon/lat arrays.