Live data from Hacker News

Rebuilding Strava's Global Heatmap

medium.com

1–10 of 15 posts

Re: Rebuilding Strava's Global Heatmap

#2
Cool article. I found some neat things in their data.

You can see the burning man "city" moves slightly each year creating an "echo" in the data.

https://labs.strava.com/heatmap/#13.49/-119.20399/40.78672/h...

Also, some people appear to have biked to the Farallone's https://labs.strava.com/heatmap/#12.41/-122.97170/37.71310/h...

Re: Rebuilding Strava's Global Heatmap

#3
post #2

Cool article. I found some neat things in their data. You can see the burning man "city" moves slightly each year creating an "echo" in the data. https://labs.strava.com/heatmap/#13.49/-119.20399/40.78672/h... Also, some people appear to have biked to the Farallone's https://labs.strava.com/heatmap/#12.41/-122.97170/37.71310/h...

AQUABIKE!

This is neat =)

Re: Rebuilding Strava's Global Heatmap

#5

It seems they have removed tiling level 16 and 17 :-( For example: Level 16 on the old heatmap: http://globalheat.strava.com/tiles/cycling/color3/16/33705/2... Level 16 on the new heatmap (empty tile): https://heatmap-external-b.strava.com/tiles/ride/blue/16/337...

It is serving 512px tiles by default, which only go one level lower. At 256px, the level 16 requests are valid: https://heatmap-external-b.strava.com/tiles/ride/blue/16/337...

Re: Rebuilding Strava's Global Heatmap

#6
post #5

It seems they have removed tiling level 16 and 17 :-( For example: Level 16 on the old heatmap: http://globalheat.strava.com/tiles/cycling/color3/16/33705/2... Level 16 on the new heatmap (empty tile): https://heatmap-external-b.strava.com/tiles/ride/blue/16/337...

It is serving 512px tiles by default, which only go one level lower. At 256px, the level 16 requests are valid: https://heatmap-external-b.strava.com/tiles/ride/blue/16/337...

ah good to know, is there a trick for level 17 also? For example https://heatmap-external-b.strava.com/tiles/ride/hot/17/6745... returns empty tile

Re: Rebuilding Strava's Global Heatmap

#8
post #5

Earlier quoted context omitted.

It is serving 512px tiles by default, which only go one level lower. At 256px, the level 16 requests are valid: https://heatmap-external-b.strava.com/tiles/ride/blue/16/337...

ah good to know, is there a trick for level 17 also? For example https://heatmap-external-b.strava.com/tiles/ride/hot/17/6745... returns empty tile

level 16 is as far as it goes.

Re: Rebuilding Strava's Global Heatmap

#9
Absolutely lovely. The pedant in me wants to point out this isn't exactly a heatmap; there's no heat spreading blobbiness. It's more of a spatial histogram. Nothing wrong with that! The localized normalization of values using a CDF is very clever.

Re: Rebuilding Strava's Global Heatmap

#10
post #3
post #2

Cool article. I found some neat things in their data. You can see the burning man "city" moves slightly each year creating an "echo" in the data. https://labs.strava.com/heatmap/#13.49/-119.20399/40.78672/h... Also, some people appear to have biked to the Farallone's https://labs.strava.com/heatmap/#12.41/-122.97170/37.71310/h...

AQUABIKE! This is neat =)

Ooh, another interesting spot

https://labs.strava.com/heatmap/#11.86/-118.45498/42.54408/h...

Alvord lake/desert in Eastern OR

Post reply on HN