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I added significant detail to a section of our city over the last couple of weeks, enough that it is visible at many zoom levels. Everything has been fully rendered at zoom levels 13 and up. Nothing re-rendered at zoom levels 12 and below. I examined the specific tile status for zoom levels 9 through 12. In all cases:

  • The status was clean. The system doesn't believe anything has changed.
  • The last re-render was January 30th
  • If I force the tile to be dirty, it does properly re-render

By any chance:

  • Are zooms 0-12 done in an entirely different manner, that ignores clean/dirty status?

  • If not, I believe I've found a bug.

asked 01 Apr '17, 22:26

MrPete's gravatar image

accept rate: 0%

edited 01 Apr '17, 22:29

Lower zooms are more expensive to render (there's more data per tile to consider) and are typically only (re)rendered as a batch job when the rendering style gets updated, to cut down on frequent expensive renders.

Can't find the reference to your specific question right now, but Featured_tile_layers/Updates and how-often-does-the-main-mapnik-map-get-updated have plenty of info.

permanent link

answered 01 Apr '17, 23:59

Vincent%20de%20Phily's gravatar image

Vincent de P... ♦
accept rate: 19%

Wow. Since render style is stable that means this really only happens manually.

(02 Apr '17, 15:13) MrPete
1 the rendering style does get regular updates. Some releases might get skiped by's renderer but in general they're pretty close.

(02 Apr '17, 17:07) Vincent de P... ♦

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question asked: 01 Apr '17, 22:26

question was seen: 2,077 times

last updated: 02 Apr '17, 17:07

NOTICE: is no longer in use from 1st March 2024. Please use the OpenStreetMap Community Forum