[OSM-talk] Updating of slippy map
S.L.Chilton at mdx.ac.uk
Sun Dec 17 18:13:18 GMT 2006
Is Potters Bar included in your Herts rendering? if not could it be? which layer would it appear on?
I am working on finalising the surveying for PBar and it would be useful to be able to see and download the bits I need each time.
From: talk-bounces at openstreetmap.org on behalf of guy at graviles-reynolds.org
Sent: Sun 12/17/2006 11:12 AM
To: talk at openstreetmap.org
Subject: Re: [OSM-talk] Updating of slippy map
Quoting Dirk-LÃ¼der Kreie <osm-list at deelkar.net>:
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> Steve Chilton schrieb:
> > Thanks for the offer. I will see how I get on first before troubling you.
> > Incidentally, can you expand on your "data is of mixed quality" comment?
> > Is there something the project should be addressing here?
> > Cheers
> > STEVE
> No sorry that was due to a lack of words (I'm not a native english
> speaker). The tiles are not from a single dataset like the mapnik layers
> that are generated from a single database dump, but the tiles represent
> what was available when the tile was rendered. Additionally the tiles
> are rendered at very different times so you might get tiles a few hours
> old next to tiles weeks old (but not necessarily outdated).
> Then there have been some changes in the rendering, patches to
> osmarender for example, that affected the visual outcome, together with
> the fact that some tiles get updated more often than others that *may*
> lead to a strange appearance on the map.
> And you are not really troubling me with requests. I am working on a
> jobserver (first only for my 4-5 renderers) that can take requests
> Furthermore experience shows that the tiles at home crowd can render faster
> than the Requests api can generate new jobs, so there are times where I
> am glad to have some meaningful render-work for my machines, i.e. your
I have a set of perl wrappers which I run for specific tilesets, so whilst my
renderers spending most of their time rendering random tiles, I do regularly
run specific sets i.e. Baldock where I am based and do most of my mapping,
North Herts where I do most of my regular travelling, Hertfordshire as part of
Thus Baldock will be as up to date as my last edit and there are only a couple
of us working here. Simlarly with North Herts, where there a few more of us.
Whilst my intention is only too render Hertfordshire once a week/fortnight, as
it takes several days to render because of the amount of data.
The volume of information in these specific areas also explains why Dirk maybe
way ahead on tiles uploaded, and I appear to be ahead on Bytes of data.
Guy 'Batchoy' Reynolds
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