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

[john whelan]

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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