1. The first allows the user to add a <FileSource
name="foo">/home/bar/baz/</FileSource> to the beginning of the file
and then in any of the symbolisers you can say:
<FooSymboliser base="foo" name="bridge">
It it will refer to the file /home/bar/baz/bridge.
2. The second allows you to create Datasource templates at the top
level, which can be used later in the actual layers like so:
<Map>
<Datasource name="db">
<Paramaeter name="host">/tmp</Parameter>
</Datasource>
<Layer name="lay">
<Datasource base="db">
<Parameter name="table">points</Parameter>
</Datasource>
</Layer>
</Map>
And the host parameter will be used in the layer.
3. The third adds the "base" parameter to the raster and shape input
plugins. All it does is specify a path to prefix to the filename prior
to using it. Together with the above feature it allows things like:
<Map>
<Datasource name="shapes">
<Paramaeter name="base">/home/foo/shapes</Parameter>
</Datasource>
<Layer name="lay">
<Datasource base="shapes">
<Parameter name="file">places</Parameter>
</Datasource>
</Layer>
</Map>
And it will use the shapefile /home/foo/shapes/places
1. The README talks about "scons.py", but it is just called "scons".
2. In demo/c++ there is a Makefile, but the readme.txt gives a command
line to compile. Both don't work for me. One error can at least be
fixed by adding -I../../agg/include to the command line.
3. When compiling Mapnik an error is thrown because of a redefined type.
This was on an Intel 64Bit machine. Fixed by "typedef char byte" to
"typedef uint8_t byte" in include/mapnik/global.hpp. I am not sure
whether thats the right fix, though, I just guessed. :-)
4. include/mapnik/image_data.hpp needs
#include <mapnik/octree.hpp>
to compile
Example:
>>> from mapnik import *
>>> im = Image(200,200)
>> save_to_file('test.png',im) # Guess image type from file extension
>> save_to_file('test.png,'jpeg',im) # Explicitly save as JPEG
>>> from mapnik import *
>>> for name in FontEngine.instance().face_names():
... print name
...
DejaVu Sans Bold
DejaVu Sans Bold Oblique
....
2. std::vector<std::string> is reflected as mapnik_.Names object
TODO: test if there are more then one face in the file
2. PostGIS plug-in - optional 'multiple_geometries' parameter to control how Multi* geometries built.
3. MarkersSymbolizer (work in progress) to render vector shapes (markers) alonh a path with collision detection.
