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import mapnik
from shapely.geometry import *
class TestDatasource(mapnik.PythonDatasource):
def __init__(self):
super(TestDatasource, self).__init__()
def features(self, query):
return mapnik.PythonDatasource.wkb_features(
keys = ('label',),
features = (
( Point(5,6).wkb, { 'label': 'foo-bar'} ),
( Point(100,60).wkb, { 'label': 'buzz-quux'} ),
)
)
if __name__ == '__main__':
m = mapnik.Map(1280,1024)
m.background = mapnik.Color('white')
s = mapnik.Style()
r = mapnik.Rule()
r.symbols.append(mapnik.PointSymbolizer())
t = mapnik.TextSymbolizer(mapnik.Expression("[label]"),"DejaVu Sans Book",10,mapnik.Color('black'))
t.displacement = (5,5)
r.symbols.append(t)
s.rules.append(r)
m.append_style('point_style',s)
ds = mapnik.Python(factory='TestDatasource')
layer = mapnik.Layer('python')
layer.datasource = ds
layer.styles.append('point_style')
m.layers.append(layer)
m.zoom_all()
mapnik.render_to_file(m,'map.png', 'png')
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