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Map update very slow with Mapnik.Plus & Zoom #1280

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openstreetmap-trac opened this issue Jul 23, 2021 · 3 comments
Closed

Map update very slow with Mapnik.Plus & Zoom #1280

openstreetmap-trac opened this issue Jul 23, 2021 · 3 comments

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@openstreetmap-trac
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Reporter: dantje
[Submitted to the original trac issue database at 3.09pm, Monday, 20th October 2008]

If you download a bigger area and zoom in, the Mapnik.Plus style is
very slow in updating the map. Other styles are faster. If you zoom
out again, it performs considerably better.

@openstreetmap-trac
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Author: ColinMarquardt
[Added to the original trac issue at 6.51am, Tuesday, 21st October 2008]

I don't know how to fix it, but could it be that a lot less icons or text gets shown when you are zoomed out? I don't really see such a slowness here though, even when I look at a crowded area (downtown Dresden, with many icons, text for both nodes and ways, areas, relations...).

@openstreetmap-trac
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Author: ColinMarquardt
[Added to the original trac issue at 7.40pm, Saturday, 25th October 2008]

Could it just be a coincidence that you seem to have the problem with MapnikPlus and not with other styles?

I found that Merkaartor gets slow (sometimes very slow) in certain areas. Investigating a bit more, it seems to be related to relations (wasn't that a nice pun?).
I.e., when you download the area near http://openstreetmap.org/?lat=51.13347&lon=13.61822&zoom=16&layers=B000FTF, you will get the rather big relation 36823 (Zitzschewig), and as soon as that is in Merkaartors map, it gets slow. It seems to help a bit to disable viewing relations (I normally have them shown), but not much. If that's not the case for you, I'll open another ticket.

@openstreetmap-trac
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Author: koying
[Added to the original trac issue at 1.47pm, Monday, 16th February 2009]

I tend to think this has been resolved by the numerous drawing optimisations (+ NVIDIA_HACK?). Please re-open otherwise.

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