About tile updating

Posted by Kurzov on 29 August 2020 in English (English).


Out of curiosity, how often are the tiles updated? They appear to not be updating… completely, that is. Both TopoMap and Histor are updated from zooms 10 to 13, and Histor has appeared to be partially updated at zoom 19, but standard OGF hasn’t appeared to have updated its tiles on any zoom for the past few hours.

Location: -0.656, 158.603

Comment from KTheBritMC on 29 August 2020 at 01:34

It depends on what you’ve done.

Various forms of editing can take various amounts of time. For example, borders of a large country may take days to load because the area in which the nodes have been placed is so large.

If it’s say, a road, maybe about 300m long it could take about an hour or maybe 2.

A lot of the edits work in chunks, so one chunk may update before another, leaving a white patch, but don’t worry because they will appear at some point, maybe about 1 or 2 hours later.

The updates of the different zooms also vary in the same way as the chunks if you know what I mean.

You’ve just got to be patient, you can still edit of course and they’ll pop up at some point :)

Comment from Kurzov on 29 August 2020 at 01:57

1-2 hours? Prior to today, it’s almost always taken around 15 minutes or less for a road that long to be completely rendered for me. Plus my edits in the changesets were mostly confined to a small area.

Comment from KTheBritMC on 29 August 2020 at 02:33

Are they loaded now? How long did they take?

Comment from Kurzov on 29 August 2020 at 04:18

Not yet.

Comment from CartographerKing on 29 August 2020 at 13:12

I found this about how the render works, according to thilo on a 2016 diary entry : Rendering intervals are as follows:

Zoom levels 0 - 8: once a day (at 7:10 UTC) Coastline at zoom levels > 9: every 30 minutes Everything else at zoom > 9: every 5 minutes

Apart from that, unexpected rendering behavior might occur at any time. Tile expiry on OGF is done by a script that I’ve written with the explicit goal of minimizing unnecessary re-rendering. Which might actually work a bit too well sometimes. Whenever this occurs, don’t hesitate to let me know.

Comment from CartographerKing on 29 August 2020 at 13:12

But right now, we can’t let Thilo know. You’ll just have to deal with it :)

Comment from Kurzov on 29 August 2020 at 16:08

The tiles have updated by now.

Comment from Taka on 30 August 2020 at 14:16

One thing I’ve noticed is that it does feel like it gets “stuck” sometimes, and making another edit in the area can help getting it unstucked.

Comment from Luciano on 30 August 2020 at 15:15

What Taka said is exactly right. Sometimes the render algorithm “misses” your edit, and the best way to get your edit to render is to go back and make another edit in the same area.

Move a single node 3 meters, add a new node to a curve, delete a node - something minor - and upload, and that will “kick the render in the pants” and it will work.

Comment from wangi on 30 August 2020 at 16:49

The coastline updater/checker was choking on data yesterday morning - I fixed that.

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