Strava overlay has trouble rendering

[Guylby]

Description

Hi,

I've been trying to use a Strava heatmap overlay inside Osmand but the rendering is not smooth at all. Sometimes tiles don't render, sometimes they flicker in and out, some tiles are missing even though they are all downloaded for offline use

What is strange is that another transparent overlay I use for google traffic does not exhibit this behaviour, neither utilising a microsoft earth satellite image overlay.

Steps to reproduce

Add a strava heatmap overlay
The map source settings I used are as follow:

Link:
https://heatmap-external-a.strava.com/tiles-auth/run/bluered/{0}/{1}/{2}.png?Key-Pair-Id={REDACTED}&Policy={REDACTED}&Signature={REDACTED}
You have to have your own KeypairID, Policy and Signature for it to work

Zoom: Min 8 - Max 19
Expiry: 43829mn (1month)
Mercator projection: pseudo-mercator
File format: 1 image file per tile

For the last settings, using sqlite db results in the same behaviour

Actual result

Two examples of tiles not loading, are flickering in and out. All tiles were downloaded offline and stored on the device, so it's not a problem of missing data (especially as you can see them flickering in and out, showing they are indeed present)

Example 1	Example 2
screen-20241120-225102_cut1_comp.mp4	screen-20241120-225102_cut2_comp.mp4

Expected result

Tiles are loaded correctly and don't flicker

Your Environment (required)

WARNING Crash-Logs MAY contain information you deem sensitive.
Review this CAREFULLY before posting your issue!

OsmAnd Version: 4.9.7
Android/iOS version: 13
Device model: Sony Xperia 10 III
Crash-Logs: ?

[pebogufi]

Could you please be so kind to post the link for google traffic overlay ?
Thanks a lot.

[Guylby]

This is the link for the google traffic overlay:
https://mts0.googleapis.com/vt/lyrs=m,traffic&x={1}&y={2}&z={0}&style=15
You still get a little bit of superfluous information like some location and POIs but it's the one that is the cleanest that I found

[pebogufi]

Thanks a lot !

[yuriiurshuliak]

I was able to reproduce the issue with the Strava heatmap overlay. Here's what I did:

1. Set the Overlay map to a custom Strava heatmap using the link: https://t.me/ruosmand/167446.
2. Kept the map source as an offline vector map.
3. Set the Overlay visibility slider to maximum.
4. Scrolled the map and zoomed in and out.

Observed Behavior:

• Some tiles do not load immediately but appear after a short delay.
• I did not observe flickering or tiles temporarily disappearing during my testing.

This behavior seems consistent with how online maps load tiles, even when pre-downloaded.

OsmAnd~ 5.0.0#3807m, released: 2024-11-26

video_2024-11-26_16-17-53.mp4

video_2024-11-26_16-18-07.mp4