[Talk-GB] Freemap - experimentally expanding to cover the whole of England

[Neil Pilgrim]

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 <Nick.Whitelegg at solent.ac.uk> 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
>
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