[Talk-ca] Degrading Open Streetmap (sort of...).

[Mike Dupont]

This should be a basic idea of mapnik, you can just load the database
with the information you want to display.
https://github.com/mapnik/mapnik/wiki/MapnikTutorials
mike

On Fri, Dec 23, 2011 at 2:34 PM, john whelan <jwhelan0112 at gmail.com> wrote:
> A couple of things spring to mind, the first is use a local copy of OSM with
> Maperitive and take out the bits you don't want from the rules such as roads
> etc.  You can also add in custom features that are not included in the
> normal render.  The second is load up JOSM with the area or part you are
> interested in.  Download a square meter or so with no data as a new layer.
> Switch back to the first map.  Select the bits you do want then copy them to
> the second map.  Save the second map.
>
> OSMConvert will compress the data nicely to PBF format.  JOSM will read PBF
> format with a plugin, Maperitive will load them directly.
>
> Then render the second map.
>
> Cheerio John
>
> On 22 December 2011 22:05, Colin McGregor <colin.mc151 at gmail.com> wrote:
>>
>> Is there a guide as to how to extract Open Streetmap data, but only some
>> of it?
>>
>> I'm poking at the question of maps for amateur radio use. With this is
>> an interest in azimuthal equidistant projection maps. I want a map
>> database that covers the following:
>>
>> - The outlines of all continents, and MAJOR islands
>> - The path of MAJOR rivers
>> - National level boarders
>>
>> Bottom line, this information will be displayed on screen and even at
>> WHUGA (7680×4800 -
>>
>> http://en.wikipedia.org/wiki/Graphic_display_resolutions#WHUXGA_.287680.C3.974800.29)
>> the highest screen resolution I have been able to find defined, a LOT
>> of detail could be dropped without ill effect.
>>
>> Thanks.
>>
>>
>> Colin McGregor
>> VE3ZAA
>>
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-- 
James Michael DuPont
Member of Free Libre Open Source Software Kosova http://flossk.org