Hey Graham, All very helpful information, thank you very very much :-)
I just managed to figure out where I got to. I basically followed the tutorial here: http://trac.mapnik.org/wiki/GettingStarted to save you clicking it, I haven't even got the osm stylesheet yet, but I have rendered a rather sweet view of the entire world. Not too shabby, and not exactly advanced, but I was quite happy. So any pointers for the biggest learning curve bit? ;-) Maybe I should wait for the thang Richard mentioned, although I'd love to get something at a more local level than the entire world rendered in Mapnik, just so I can tick that off my to-do list :-) ttfn, Adam On 15 Jun 2011, at 22:41, Graham Jones wrote: > Hi Adam, > No problem - these lists have been a bit busy over the last few days.... > > If you have got mapnik running and generating maps using the 'standard' osm > stylesheet, you have got over the biggest learning curve. You will > probably have noticed that the 'standard' osm stylesheet is very complicated > - this is because it renders lots of different information differently at > different zoom levels. > > If you want to add contours, it is possible to do that by importing the > contours into your postgresql database, and modifying the standard osm style > file to plot them. I have a crude example of this at > http://code.google.com/p/ntmisc/source/browse/#svn%2Fkefalonia_map - all my > changes compared to the standard osm style file are in the 'inc' directory - > I added a file that defines the style for the contour line drawing, and also > changed some other files to include the new one - search the osm wiki for > contours to see how to get contours into your postgresql database. I did a > little write up on how I did this (but not much detail I am afraid) at > http://nerdytoad.blogspot.com/2011/04/kefalonia-map.html. > > To work on building up a mapnik stylesheet from scratch to get a better > understanding of how it works, I would suggest starting on a simple > transparent overlay to display over other map tiles. I put together a few > slides on my version of how to render map data with mapnik, which you can see > at http://maps3.org.uk/doc/index.html. If you look at > http://maps3.org.uk/osm_opendata, the 'about' link has a bit of a descripton > of how I produced the overlays for that map (another example of a very simple > overlay). > > Both of the above examples use the standard xml stylesheet for mapnik. I > have been experimenting with a different way of producing the xml stylesheet > using a different language and a pre-processor called 'carto'. I did a > little write up at > http://nerdytoad.blogspot.com/2011/05/rendering-openstreetmap-data-using.html > on where I have got to - It is much less complete than the full OSM > stylesheet, and I think I need to learn some of the tricks used in that style > to make the map look better, but I think it is simpler to see what it is > doing, so I think I will stick with this for simple things. > > Hope that gets you started. Let me know if you get stuck and I will see > what I can do. The mapnik-users mailing list is a good place to ask for > help too. > > Regards > > > Graham. > > On 15 June 2011 14:22, Adam Hoyle <adam.li...@dotankstudios.com> wrote: > Hi Graham, > > Sorry, I got a bit over excited and subscribed to tons of OSM mailing lists > and so totally missed your awesome reply :-( > > Sorry if I wasn't clear - I've successfully got Mapnik installed (did it a > week or three ago and it was pretty painless as far as I recall), so am > particularly after a sample config file to start from, particularly one with > hill contours / gradients / > whatever-they-are-really-called-outside-the-confines-of-my-head. > > Altho' having said that the package that Parveen Arora is putting together > looks pretty awesome, so maybe I should hold out for that, even tho' it looks > more targeted for Debian than OS X - I guess if push comes to shove I could > install Debian in VMware, which I already have on my laptop. > > By the way townguide looks rather amazing, so adding that to my (rather long) > list of things to check out :-) > > Thanks for the offer of helping generate the configuration file, not sure of > the best way to do that tho' as I want something I can start with and hack > around with and iterate a lot until it's "right". The primary thing I want is > pubs and post boxes available when zoomed out (ideally the same zoom range as > footpaths show up on), and if possible the mountain gradients/contours - I've > seen a couple of maps "in the wild" that use these, but not sure how > possible/straightforward it is for a Mapnik newbie such as myself. > > Cheers, > > Adam > > On 10 Jun 2011, at 10:46, Graham Jones wrote: > >> Adam (changed the title of the thread to keep this one separate), >> The simplest way to do it is to make overlays that are transparent and you >> can view over another set of tiles. >> I have done a few before now - there is one visible at http://maps3.org.uk, >> which highlights historic things over the normal mapnik rendering. >> I still have the idea to set up something to make the learning curve easier, >> because I appreciate that setting up mapnik and all its dependencies is >> quite daunting - there is something on my osm user page about it >> (grahamjones). >> >> If you want to do it yourself, there are a few different sets of >> instructions - the osm wiki 'mapnik' page is a good start. Note that linux >> is much easier than Windows (or at least there are better instructions!). >> >> I have a set of instructions that work for me at >> http://code.google.com/p/townguide/wiki/InstallationInstructions. (there >> may be a minor issue with postgresql authentication that I need to fix). >> >> Parveen Aurora is currently working on making a simple package that will >> install and configure everything for you for his Google Summer of Code >> project, but you will have to give him a few weeks to get something ready >> for testing (https://github.com/ParveenArora/MeraMap). >> >> If you would like to work out what you would like to render (ie which tag >> combinations), how you would like them drawn (line colour and width, icon >> image etc.), I can help you turn that into a mapnik configuration file and >> generate the map for you on my computer. I think it is better to spend >> time thinking about the rendering than having to worry about database >> configuration nuts and bolts. >> >> Regards >> >> >> Graham. >> >> Regards >> >> >> Graham. >> >> On 10 June 2011 10:27, Adam Hoyle <adam.li...@dotankstudios.com> wrote: >> Sorry in advance - after writing this I've realised I'm possibly heading off >> on a tangent (I do that). >> >> Speaking of the awesomeness of Cycle Map and how that encourages people - I >> really want an openwalkingtothepubmap, which would basically be a clone of >> the gorgeous cycle map, but with the coloured cycle routes removed in favour >> of coloured paths and also pubs visible when quite zoomed out (and prolly >> post boxes too, but that is probably particularly niche). >> >> I'm starting to realise that I might need to roll up my sleeves and do this >> myself. >> >> Every now and then I try to install Mapnik on my Mac, and mostly fail, but I >> tried t'other day and it worked, so I'm wondering where the various styles >> that are used on OSM are kept (or even if they are actually available for >> derivative use) - I'm most keen on cyclemap or something that has gradients, >> cos as a walker I'm quite interested in whether I am about to walk over a >> massive hill or not. >> >> Can anyone point me in the right direction? >> >> All the best, >> >> Adam >> >> On 10 Jun 2011, at 09:35, Bob Kerr wrote: >> >>> I agree with Andy about increasing the number of mappers is essential. With >>> Cycle map he has increased the interest in the cycling communities. Getting >>> interest and publicity is very difficult. I can see many other communities >>> that we could encourage to start helping us, from NHS to golfers but we >>> have no organised way of doing this at the moment. Using a bot to replace >>> large sections of data in the UK is going to be counterproductive or >>> destructive, especially as the UK is now 80% (road name)complete. However >>> restricting a bot by area to the size of small villages may help. I believe >>> we can both encourage people to join us and use the a bot on small areas at >>> the same time. >>> >>> Cheers >>> >>> bob >>> >>> >>> From: Andy Allan <gravityst...@gmail.com> >>> To: sk53_...@yahoo.co.uk >>> Cc: talk-gb@openstreetmap.org >>> Sent: Thursday, 9 June 2011, 16:45 >>> Subject: Re: [Talk-GB] OSM Analysis New Data and bot >>> >>> On Thu, Jun 9, 2011 at 3:42 PM, Jerry Clough : SK53 on OSM >>> <sk53_...@yahoo.co.uk> wrote: >>> >>> > In order to get a better level of completeness in the UK what we need are >>> > more mappers. >>> >>> Absolutely. >>> >>> Everything we do should be focussed on helping get more mappers, or >>> helping the mappers we have get their jobs done more easily. >>> Everything that is a direct substitute for having more mappers is, at >>> best, a distraction from (what I see as) the desired goal. If we have >>> mappers, and lots of them, then - as we've now demonstrated - we can >>> get a glorious dataset. >>> >>> Note that not everyone here shares the same goals - some people are >>> focussed on the data, others on the community. It might be worth >>> examining why we (collectively) have a tendency to discuss the data >>> all the time and I see very few discussions on community matters. >>> >>> I find in most conversations, if the answer is "because we don't have >>> enough mappers yet" then the solution is not to bypass them with some >>> form of automation but to get more of them. Unfortunately to most >>> OSMers, community building seems hard (which it is), and writing bots >>> or doing imports seems easy (which it's not). >>> >>> > A bot is putting short-term gain ahead of our long-term interests. >>> >>> Indeed. What's more, all the effort that goes into writing bots, >>> discussing them, justifying them etc is time that hasn't gone into the >>> primary goal of recruiting and helping more people to OSM. >>> >>> Cheers, >>> Andy >>> >>> >>> _______________________________________________ >>> Talk-GB mailing list >>> Talk-GB@openstreetmap.org >>> http://lists.openstreetmap.org/listinfo/talk-gb >>> >>> >>> _______________________________________________ >>> Talk-GB mailing list >>> Talk-GB@openstreetmap.org >>> http://lists.openstreetmap.org/listinfo/talk-gb >> >> >> _______________________________________________ >> Talk-GB mailing list >> Talk-GB@openstreetmap.org >> http://lists.openstreetmap.org/listinfo/talk-gb >> >> >> >> >> -- >> Graham Jones >> Hartlepool, UK. >> > > > > > -- > Graham Jones > Hartlepool, UK. >
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