Add travel times link
@@ -10,3 +10,7 @@ H3's hexagonal grid is well suited to analyzing movement. In addition to the ben
H3 can create indexes that refer to the movement from one cell to a neighbor. These directed edge indexes share the advantages with their cell index counterparts, such as being 64 bit integers. The use of directed edges makes it possible to associate a weight with a movement in the grid.
(A planned improvement for the H3 system is to create indexes that refer to the edge between two cells without regards of direction.)
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+## Links
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+* Observable notebook example: [H3 Travel Times](https://observablehq.com/@nrabinowitz/h3-travel-times)
