Python使用XML操作mapnik,实现复杂标注（Multi line text symbolizer）

test.py

import mapnik stylesheet = 'world_style.xml' image = 'world_style.png' m = mapnik.Map(1200, 800) mapnik.load_map(m, stylesheet) m.zoom_all() mapnik.render_to_file(m, image) print "rendered image to '%s'" % image

world_style.xml

<Map background-color="#c4dff6" srs="+proj=merc +a=6378137 +b=6378137 +lat_ts=0.0 +lon_0=0.0 +x_0=0.0 +y_0=0.0 +k=1.0 +units=m +nadgrids=@null +wktext +no_defs +over" font-directory="./fonts" maximum-extent="-20037508.34,-20037508.34,20037508.34,20037508.34"> <Style name="My Style"> <Rule> <!-- 复杂标注 --> <TextSymbolizer face-name="DejaVu Sans Bold" size="12" placement="point" dy="3" wrap-width="35" allow-overlap="0"> [NAME]+'-'+[LEVEL] ++' '<Format face-name="DejaVu Sans Oblique" size="9">'-'</Format> +' '<Format face-name="DejaVu Sans Oblique" size="9">'('+[POSTAL]+')'+'-'+[LabelRank]</Format> </TextSymbolizer> </Rule> </Style> <Layer name="world" srs="+proj=longlat +ellps=WGS84 +datum=WGS84 +no_defs"> <StyleName>My Style</StyleName> <Datasource> <Parameter name="type">shape</Parameter> <Parameter name="file">ne_110m_admin_0_countries.shp</Parameter> </Datasource> </Layer> </Map>

效果图： 参考：

http://blog.csdn.net/u010924834/article/details/56291059 http://mapnik.org/news/text_formating https://github.com/mapnik/mapnik/issues/3158