[Talk-GB] OSMUK walkers map - GitHub repo and demo now available

Nick Whitelegg nick.whitelegg at solent.ac.uk
Wed Dec 30 17:15:59 UTC 2020

... and to follow up, yes, in an ideal world I'd have created more documentation, for example, to point people in the right direction as to how to change the map style; but as I'm sure you appreciate time is rather limited. I will try and make it more comprehensive if I have a moment


From: Nick Whitelegg <nick.whitelegg at solent.ac.uk>
Sent: 30 December 2020 17:13
To: Andy Townsend <ajt1047 at gmail.com>; talk-gb at openstreetmap.org <talk-gb at openstreetmap.org>
Subject: Re: [Talk-GB] OSMUK walkers map - GitHub repo and demo now available

Hello Andy,

Thanks for your comments.

To be honest, maybe I was expecting a little too much that possible contributors would do a bit of research on what's required, for example the format of a Tangram style file, which is the main thing which controls what is on the map; so that if people wanted to add new things to the map or tweak others, they'd research how to do this in Tangram and have a go at tweaking the file.

You are right that I have said nothing about how I import the db though. I do use a modified osm2pgsql style file for the version on free-map.org.uk, though the version on the OSMUK server uses the unmodified file. I have now added the scripts I use to create the database to the repo.

Issues like the slowness of the map are down to the fact that I do not yet do any caching, plus both servers I use (one donated, one paid-for by myself) are fairly low on memory. Again, the whole point of the demo as it stands is a quick and dirty proof-of-concept to experiment with vector tiles.


From: Andy Townsend <ajt1047 at gmail.com>
Sent: 30 December 2020 15:58
To: talk-gb at openstreetmap.org <talk-gb at openstreetmap.org>
Subject: Re: [Talk-GB] OSMUK walkers map - GitHub repo and demo now available

On 30/12/2020 10:13, Nick Whitelegg via Talk-GB wrote:

At some point, at Adam's suggestion, I will probably setup a poll on Loomio to gather ideas for features.

Hi Nick,

Thanks for this, but I suspect that a bit more information will be needed by anyone who might be thinking about helping with this.  Currently the "What's needed" section of the readme is a bit "Monty Python: how to play the flute" ( https://www.youtube.com/watch?v=-1sM29zGxeo ).  As just one example, I'd expect that the osm2pgsql database needs to be imported with a particular style file to decide which columns are created.  Maybe that's the default osm2pgsql one, maybe it's a different one such as https://github.com/gravitystorm/openstreetmap-carto/blob/master/openstreetmap-carto.style , or maybe it's a cut-down one to minimise database size - but without that information, no-one is going to be able to reproduce what you currently have at or https://www.free-map.org.uk/ and investigate why things are as they are there - for example why are some things shown and not other, why does the screen only take up a quarter of the browser window, why is it so slow (is that a server or a client side issue)?

I appreciate that this is only designed to be a proof of concept - but surely the purpose is that people will see it and say "that isn't exactly what I was looking for but I can change it to do X, and Y, and Z"?  I don't think that that's really possible right now.

Best Regards,


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