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Path Isochrones

Open Chwiggy opened this issue 3 months ago • 4 comments

Is there an existing issue for this?

  • [x] I have searched the existing issues

Feature/Enhancement Proposal

It would be nice if the API could return the constituent paths within an isochrone and their isochrone value. It seems like the lines are an intermediate result anyhow.

Additional context

Polygon creation seems to be computationally intensive and sometimes in CA code the polygon isn't needed because we just augment or clip the path network with the isochrone again.

Possible Implementation

This could be a version of the graph export, or an export of the routes that were calculated during isochrone calculation

Forum Topic Link

No response

Chwiggy avatar Sep 08 '25 14:09 Chwiggy

Applying this functionality to #2122 too would be extra cool. As these functionalities often compliment each other in our code

Chwiggy avatar Sep 08 '25 14:09 Chwiggy

This should be relatively easy as we already have the SPT before computing the concave hull. I remember Graphhopper had a blogpost about this.

sfendrich avatar Sep 10 '25 07:09 sfendrich

side note: this feature would open the door for "continuous isochrones" where each segment (or at least each pillar node) could get a distance value leaving the binning to the client :-)

SlowMo24 avatar Sep 10 '25 12:09 SlowMo24

This should be relatively easy as we already have the SPT before computing the concave hull. I remember Graphhopper had a blogpost about this.

Did you mean Visualization of Road Network Reachability with deck.gl?

aoles avatar Sep 16 '25 10:09 aoles