[mkgmap-dev] Divide number in style file

Fri May 7 10:56:44 BST 2021

yes I figured out the only current possible division would be to convert ft
to mt - that could be run against population number as well of course..
Dividing the population number to get maps of India or China a bit less
cluttered without using a specific style would be quite handy. Though yes -
besides improving rules for cities not much else use of a division factor
for values that I can think of. So right now only 3.28, 3.28^2, 3.28^3 and
so on is possible (i did not actually check if it is possible to convert
twice, but think so).

On Fri, 7 May 2021 at 16:56, Ticker Berkin <rwb-mkgmap at jagit.co.uk> wrote:

> Hi Felix
>
> I don't think there is any way to do maths on tag values.
>
> It should not be too difficult to implement additional variable filters
> that do a simple maths op with a constant, eg:
>   {set population='${population|divide:"7"}'}
>
> Ticker
>
> On Wed, 2021-05-05 at 22:58 +0800, Felix Hartmann wrote:
> > Is it possible to divide a number by a factor in the style file?
> >
> > ( mkgmap:country=CHN | mkmgap:countrz=CN | mkgmap:country=IND |
>
>                                      ^^
> > mkgmap:country=IN ) & ( place=city | place=island | place=town |
> > place=village ) & population=* {set population='${population}/7'}
> >
> > Did not work. I intend to divide the population in cities in China
> > and India because otherwise cities clutter up the map there (also in
> > India they do not use admin level ... which could be an alternative).
> >
> > --
> > Felix Hartman - Openmtbmap.org & VeloMap.org
> >
> > _______________________________________________
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> > mkgmap-dev at lists.mkgmap.org.uk
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-- 
Felix Hartman - Openmtbmap.org & VeloMap.org
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