Unable to get custom TMS map background (Strava heatmap) to work

[kylebarron]

After seeing that OSM is allowed to trace from Strava Heatmap data, I've been trying to set up those tiles as a custom layer in iD. The URL works when setting {z}/{x}/{y}, but nothing is displayed with {z}/{x}/{-y} or {z}/{x}/{ty}.

Example:

Set to {z}/{x}/{y}:

Bing map:

Set to {z}/{x}/{-y} or {z}/{x}/{ty}:

To reproduce:

To use the high-res authenticated heatmap tiles, I'm following these instructions.

https://heatmap-external-{switch:a,b,c}.strava.com/tiles-auth/run/bluered/{zoom}/{x}/{y}.png?Key-Pair-Id=.....&Policy=.....&Signature=.....

with OAuth values of mine pasted in that I found from my logged-in Strava cookies.

The same URL works in JOSM set to TMS style.

[quincylvania]

@kylebarron Hmm this is a weird problem that appears to have something to do with offsets. This is the heatmap at Strava's site:

And as a custom layer in iD at the same zoom level and approximately the same position:

It's fetching and displaying the tiles at the wrong zoom level. I think #6198 could address this. I'm not sure how tools like JOSM account for this automatically.

[bhousel]

It's fetching and displaying the tiles at the wrong zoom level.

Some tiled sources use 512px tiles - maybe it just needs a workaround this? (This update-imagery script checks the things we get from editor-layer-index and makes a few adjustments).

iD/data/update_imagery.js

Lines 96 to 102 in 7a55769

	// supports 512px tiles
	if (source.id === 'Mapbox') {
	im.template = im.template.replace('.jpg', '@2x.jpg');
	im.tileSize = 512;
	} else if (source.id === 'mtbmap-no') {
	im.tileSize = 512;
	}

(Though I guess the 512px tile size doesn't work in custom imagery, which is what this issue is about..)

[quincylvania]

Some tiled sources use 512px tiles - maybe it just needs a workaround this?

Oh okay it's definitely this. I tried hardcoding the tile size to 512 and the layer displayed correctly.

Seems like we might need some UI to set the size.

[kylebarron]

Awesome, thanks! How long does it usually take for updates to make it to production?

[quincylvania]

@kylebarron We usually do a release per month or so. We're due for one, so maybe this week or next!