HI Nick, Quick question. How are you dealing with rendering the coastline?
Tony On 12 December 2013 13:59, Nick Whitelegg <[email protected]>wrote: > > Hello Neil, > > Normally it updates every week. This latest update was a whole England > planet file taken from geofabrik on Monday or Tuesday (can't remember > exactly which day) so should be up to date up to the weekend, certainly in > your area which wasn't covered before this latest import. > > Yes, it could be possible to render surrounding tiles, or at least > schedule a cron job to run popularly requested areas in the background at > quiet times of day e.g. between 0100-0600 (given this is a UK only site we > can probably assume this will be quiet). > > The blue artefacts are a bug. There were a few issues I never got round to > resolving when I originally implemented the client side renderer. > What I intend to do is go back to the original Python server side code > examples provided by the kothic developers and see if I can work out what's > missing/different in my code. This should hopefully improve performance as > well. > > If you now search for Wivenhoe it should appear near instantaneously. > > Nick > > -----Neil Pilgrim <[email protected]> wrote: ----- > From: Neil Pilgrim <[email protected]> > Date: 12/12/2013 12:37PM > Cc: "[email protected]" <[email protected]> > Subject: Re: [Talk-GB] Freemap - experimentally expanding to cover the > whole of England > > I've confirmed that it renders fine around Wivenhoe/Alresford, but is > a bit slow as you say. I do appreciate being able to tell the rights > of way from normal footpaths etc (though there is no legend?). > > Few questions: > - I know this is an expansion, but how often does it update? (I've > added some paths/RoW quite recently and they've not appeared yet) > - Is it feasible to start rendering surrounding tiles "just in case", > once the current one(s) are done? > - There appear to be blue horizontal/vertical lines on the map; are > these artifacts of the rendering or intentional? They can look a bit > like water here, especially near coastlines where there may already be > ditches, etc nearby. > > Note that I've not played with the features other than the base map yet. > > Cheers, > > -- > Neil > > > On 12 December 2013 00:34, Nick Whitelegg <[email protected]> > wrote: > > Hi, > > > > Before relying on any third-party resources I'm experimenting with > expanding > > Freemap (www.free-map.org.uk)'s coverage to the whole of England (will > > probably be Wales too next week) on my own server. > > > > This is now live. It does mean that first time a given map tile is > rendered > > (map tiles are GeoJSON-like and rendered by kothic-js, http://kothic.org) > it > > will be _slow_ - perhaps 30+ seconds. I will try and optimise the backend > > sql queries by examining the native kothic python server-side code. > > However, the data is then cached meaning that next time you visit the > area > > it will be much faster. > > > > Freemap's web services (see > > http://www.free-map.org.uk/0.6/about.html#developer) do not seem to be > > impacted so strongly (in terms of a slowdown) as the renderer suggesting > the > > rate determining step is somewhere in the rendering process. > > > > However I suspect both the renderer and web services will be very slow in > > London due to sheer volume of data. But TBH both the site and web > services > > are more aimed at countryside use so I'm not too fussed by that. > > > > Nick > > > > _______________________________________________ > > Talk-GB mailing list > > [email protected] > > https://lists.openstreetmap.org/listinfo/talk-gb > > > > _______________________________________________ > Talk-GB mailing list > [email protected] > https://lists.openstreetmap.org/listinfo/talk-gb > > _______________________________________________ > Talk-GB mailing list > [email protected] > https://lists.openstreetmap.org/listinfo/talk-gb > >
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