On Dec 3, 2010, at 6:54 AM, Pablo Carreira wrote:
> Hi Dane,
>
> > Very cool you are experimenting with typographic maps and mapnik. We should
> > be able to get this working better.
> > One thing I noticed right off is that label_position_tolerance should help
> > a bit, but it appears that somehow it is not being parsed via XML.
> > So, I fixed this in the 0.7.2 development branch (code for next release in
> > 0.7.x series) and in trunk:
> > Can you rebuild mapnik from: http://svn.mapnik.org/branches/0.7.2-dev/ and
> > try setting label_position_tolerance="100" and see if that helps with more
> > regular spacing?
>
> I had some trouble rebuilding it.
Can you explain?
> So I drawn the map with a xml/python mixture in order to use the
> label_position_tolerance.
>
Okay.
> Indeed the label_position_tolerance has a lot of influence in the spacing and
> with some tunnig the problem was solved for me.
Ah, great!
> Something I realized is that the line angle is the fundamental factor.
> Horizontal a Vertical lines results in close labels. Angular lines results is
> spaced labels.
>
> I've opened a tiket: #678
>
Okay, thanks.
> Thank you again.
>
> Here is the code and some images in annex.
>
> import mapnik
> #import cairo
>
> mapfile='mapa_postgis.xml'
> m = mapnik.Map(5600, 2400)
> mapnik.load_map(m, mapfile)
> bbox = mapnik.Envelope(225007,7480769,234934,7487527)
> s = mapnik.Style()
> r=mapnik.Rule()
>
> t = mapnik.TextSymbolizer('name', 'DejaVu Sans Book', 10,
> mapnik.Color('black'))
> t.allow_overlap=1
> #t.force_odd_labels=0
> t.label_placement=mapnik.label_placement.line
> t.minimum_distance=0
> t.label_spacing=1
> t.max_char_angle_delta=90
> #t.label_position_tolerance=100
> #t.avoid_edges=0
>
> r.symbols.append(t)
> s.rules.append(r)
> m.append_style('My Style',s)
> lay=m.layers[1]
> lay.styles.append('My Style')
> m.zoom_to_box(bbox)
> mapnik.render_to_file(m, 'temp_teste.png','png')
>
>
>
> Pablo Torres Carreira
>
> Pablo Torres Carreira
>
>
>
> > Subject: Re: [Mapnik-users] TextSymbolizer - Place labels close to each
> > other.
> > From: [email protected]
> > Date: Wed, 1 Dec 2010 09:47:28 -0800
> > CC: [email protected]
> > To: [email protected]
> >
> > Hi Pablo,
> >
> > Welcome to mapnik!
> >
> > Very cool you are experimenting with typographic maps and mapnik. We should
> > be able to get this working better.
> >
> > One thing I noticed right off is that label_position_tolerance should help
> > a bit, but it appears that somehow it is not being parsed via XML.
> >
> > So, I fixed this in the 0.7.2 development branch (code for next release in
> > 0.7.x series) and in trunk:
> >
> > http://trac.mapnik.org/changeset/2440
> >
> > Can you rebuild mapnik from:
> >
> > http://svn.mapnik.org/branches/0.7.2-dev/
> >
> > and try setting label_position_tolerance="100" and see if that helps with
> > more regular spacing?
> >
> > You will still see gaps between labels - likely more than you are aiming
> > for. Fixing this looks tricky, so I would encourage you to file a ticket at
> > trac.mapnik.org so this request does not get lost.
> >
> > Dane
> >
> > On Nov 26, 2010, at 9:38 AM, Pablo Carreira wrote:
> >
> > >
> > > Hi,
> > > I'm new to mapnik. And I'm having a good time with it, making beautiful
> > > maps.
> > >
> > > Now I want to draw a typographic map.So, I want the labels to be very
> > > close to each other along a line.
> > > The problem is that at some intervals there is a "hole" in the label
> > > placement.
> > > Is the any sugestion on how to solve that problem?
> > > Here is the code and there is an image in anex.
> > > <TextSymbolizer name="nome" max_char_angle_delta="90"
> > > allow_overlap="true" face_name="DejaVu Sans Bold" size="25"
> > > fill="rgb(0,0,0)" placement="line" spacing="1" min_distance="0"
> > > avoid_edges="0"></TextSymbolizer>
> > >
> > >
> > > Regards,
> > >
> > >
> > > Pablo Torres Carreira
> > >
> > >
> > > <mapnikexample.jpg>_______________________________________________
> > > Mapnik-users mailing list
> > > [email protected]
> > > https://lists.berlios.de/mailman/listinfo/mapnik-users
> >
> <tolerance10000.jpg><tolerance 100.jpg><no_setting.jpg>
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