[Maps-l] OSM Toolserver - spatial_ref_sys

[Dane Springmeyer]

>
> Btw, the mapnik on willow still seems to suffer the original problem  
> of
> not accepting the style files and break with the errors on saying it
> expects floats.
>

I recall River trying to work on this a long while back on #mapnik  
irc. It seems to be a problem specific to boost property_tree  
('ptree') on solaris.

Mapnik uses boost ptree for building an object tree during XML  
parsing. To make debugging this harder, Mapnik keeps a copy of boost  
property_tree in its source directory and builds against this locally.  
The reason for this is that Mapnik has been using ptree since before  
it was formally available in the boost sources.

In Mapnik trunk (aka Mapnik2, which will likely be the Mapnik 0.8.0  
release), we have removed the local copy and are using the ptree  
available within official boost sources. This required a number of  
changes in Mapnik, as ptree function names changed a bit once it was  
included. I recall River may have tried building Mapnik trunk, but I'm  
not sure if it solved this problem on Solaris.

If you guys are interested in going the Mapnik2 route on willow to try  
to get past this ptree problem, just be warned that Mapnik2/trunk is  
potentially introducing backward incompatible changes in XML parsine.  
Consider me a resource to soften this issue, and follow http://trac.mapnik.org/wiki/Mapnik2 
  for more details.

Dane


>
>
> On 02/24/2010 10:30 AM, Peter Körner wrote:
>> Kai Krueger schrieb:
>>> Yes, that is exactly the error I was seeing too.
>>
>> Okay, so rendering simple Shapefiles works (on willow):
>>
>> mazder at willow:~$ OSM=/home/project/o/s/m/osm/ $OSM/tools/render \
>>    --style $OSM/data/mapnik/shape.xml
>>
>>
>> but even with a very small stylesheet (shapefiles&  place names) it
>> stops working:
>>
>>
>> mazder at willow:~$ OSM=/home/project/o/s/m/osm/ $OSM/tools/render \
>>    --style $OSM/data/mapnik/simple.xml
>>
>> rendering bbox (-180, -85, 180, 85) in style
>> /home/project/o/s/m/osm//data/mapnik/shape-names.xml to file map  
>> which
>> is of type png in size 800x600
>>
>> Traceback (most recent call last):
>>    File "/home/project/o/s/m/osm//tools/render", line 128, in<module>
>>      main()
>>    File "/home/project/o/s/m/osm//tools/render", line 81, in main
>>      mapnik.load_map(m, style)
>> UserWarning: Could not create datasource. No plugin found for type
>> 'postgis' in layer 'placenames-large'
>> mazder at willow:~$
>>
>>
>> It seems mapnik was compiled before postgis was available and so  
>> doesn't
>> know about the postgis plugin. Maybe a simple recompile would solve  
>> this
>> issue. On this run we should add the cairo bindings to support  
>> rendering
>> to pdf, svg&  co.
>>
>> Peter
>>
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>
>
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