On Dec 21, 2010, at 8:36 AM, Harald MAYER wrote: > hi dane, > thanks for the warm welcome and for offering to dig into the label > positioning problem when you find some time - there is no urgency, but as i'm > certainly going to face the same problem with future maps of similar style, > i'm glad if you can take a look at it.
Sorry I've not yet picket this up. If you create a ticket at trac.mapnik.org you can be sure I won't loose trac of it. > and also thanks for shedding light on the usage of shild_displacement - i > misread the wiki documentation. looking forward to your patch that will > facilitate xml-debugging. This patch for better feedback on misspelled xml properties just landed: https://trac.mapnik.org/changeset/2582 > kind regards from Vienna, > harald > > > > > From: Dane Springmeyer <[email protected]> > To: Harald MAYER <[email protected]> > Cc: [email protected] > Date: 18.12.2010 19:02 > Subject: Re: [Mapnik-users] ShieldSymbolizer positioning problems > Sent by: [email protected] > > > > On Dec 17, 2010, at 3:49 AM, Harald MAYER wrote: > > dear mapnik-users, > this being my first email to this list, a short introduction: > > Hi Harald, welcome! > > my name is harald mayer, i'm working as web manager at the austrian section > of the medical humanitarian organization Médecins Sans Frontières / Doctors > without Borders (MSF). > after producing a series of online maps (like for example > http://maps.msf.at/index.php?map=sudan2010) mainly based on the excellent > (mapnik-rendered) tiles from mapbox.com, i recently started using mapnik with > the intention to produce high-res, printable versions of our (kml-based) > online-maps (see the first result here: > http://maps.msf.at/mapnik/msf_sudan_2010.jpg). > > Great, awesome to see you leveraging Mapnik and the MapBox styles for this > work. > > > to visualize our project-locations in a similar way as in our "online-maps", > i use ShieldSymbolizers. the problem i face is the exact positioning of > those: depending on the line-count of the text that the ShieldSymbolizer > renders, the positioning of the label changes, somehow overruling the > settings made with the "vertical_alignment"-attribute. i tried to illustrate > the problem with the attached image: all ShieldSymbolizers used in this test > have the same value for "dy" and show results for "vertical_alignment" > bottom, top and middle; as you can see, the label is positioned in a > different way depending on the line-count of the text, despite same settings > for "vertical_alignment". > > Okay. Sounds tricky and I would need some time to investigate further to get > a deeper sense of the problem. I'm on the road currently, but I can try to > dig more into this to give you suggestions next week. > > another problem i have is that i can't figure out how to use the attribute > "shield_displacement"; > > It is only available in trunk and via xml is 'shield_dx' and 'shield_dy' > (http://trac.mapnik.org/browser/trunk/src/load_map.cpp#L1390). > > It is an urgent need to get better docs up showing which versions support > which parameters. I also am working on this patch > (http://trac.mapnik.org/ticket/110) which will give you more feedback when > you have misspelled or otherwise used a parameter name that has no effect for > your given Mapnik version. > > i've tried: > shield_displacement="10,10" > shield_displacement="(10,10)" > shield_displacement="10" > in my mapnik-XML, but none of those showed any effect. can someone point me > in the right direction? > thanks & kind regards, > harald > > > <shieldSymbolizerTest.png><shieldSymbolizerTest.xml>_______________________________________________ > Mapnik-users mailing list > [email protected] > https://lists.berlios.de/mailman/listinfo/mapnik-users > _______________________________________________ > Mapnik-users mailing list > [email protected] > https://lists.berlios.de/mailman/listinfo/mapnik-users > > _______________________________________________ > Mapnik-users mailing list > [email protected] > https://lists.berlios.de/mailman/listinfo/mapnik-users
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