[OSM-talk] osmarender bounding box cropping

[Thom Shannon]

scrap that! I just found this
http://wiki.openstreetmap.org/index.php/Osmarender/Options#Bounds

(I'm just sending all this to the list for the sake of the archives)

Thom Shannon wrote:
> Just come up with a much simpler idea! Add a couple of nodes to the 
> osm data with a made up tag, add a render rule for the tag, build the 
> SVG then read out the coords of those nodes, they can then be removed 
> from the svg.
>
> Thom Shannon wrote:
>> Yes I am basically building a custom tile maker here! I should 
>> probably just hack a copy of tiles at home, I used to do a lot of perl 
>> so I'll have a crack at that. Thanks
>>
>> Dirk-Lüder Kreie wrote:
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>>> Thom Shannon schrieb:
>>>   
>>>> When you download your osm data based on a bounding box you get the 
>>>> whole of any ways with nodes in that box, which is of course quite 
>>>> sensible. But when you render your SVG, the map you were hoping up ends 
>>>> up down in the corner somewhere because of a big bit of coast or 
>>>> motorway sticking out.
>>>>
>>>> I'm thinking if I go through the nodes in the osm data and find the 
>>>> extreme outer points in all four directions, then work backwards I can 
>>>> figure out the coordinates in the SVG document where my original 
>>>> bounding box would be. The only problem is I'm not sure what kind 
>>>> projection osmarender uses to convert the lat/lon coords to a grid.
>>>>
>>>> Any ideas on the best way to do this?
>>>>     
>>>
>>> This is the exact same problem tilesAtHome has solved already. I'd have
>>> to look at the code to tell you what exactly is done. to get the right
>>> bbox...
>>>
>>> - --
>>>
>>> Dirk-Lüder "Deelkar" Kreie
>>> Bremen - 53.0952°N 8.8652°E
>>>
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>>>   
>>
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>
> -- 
> *** OPEN COFFEE 6 - with FACT - http://upcoming.yahoo.com/event/307022 ***
>
> Glow New Media
> t: 0151 707 9770
> m: 07730 987 574
> www.glow-internet.com
>
> Suite 712 Gostins Building
> 32-36 Hanover Street
> Liverpool
> L1 4LN
>
> Map: http://tinyurl.com/2f5nxd
> ------------------------------------------------------------------------
>
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