Mapnik - The Missing Manual

3.10.10. BuildingSymbolizer

The <BuildingSymbolizer> renders polygons in a very simple pseudo-3D fashion. The given fill color us used for the "roof", while its individual red, green and blue values are multiplied by 0.8 to create a more darkened tone for the "walls"

Table 32. BuildingSymbolizer Attributes
Attribute	Value	Default
`fill`	CSS color	gray
`fill-opacity`	foat	1.0
`height`	float	0

See also:

Example 63. BuildingSymbolizer fill

<?xml version="1.0" encoding="utf-8"?>
<Map background-color="white">

  <Style name="style">
    <Rule>
      <BuildingSymbolizer height="1" fill="[fill]"/>
      <TextSymbolizer face-name="DejaVu Sans Book" allow-overlap="true" dy="50">[fill]</TextSymbolizer>
    </Rule>
  </Style>

  <Layer name="layer">
    <StyleName>style</StyleName>
    <Datasource>
      <Parameter name="type">csv</Parameter>
      <Parameter name="inline">
wkt,fill
"POLYGON(( 1 1, 4 2, 3 4, 0 3, 1 1))",red
"POLYGON((11 1,14 2,13 4,10 3,11 1))",green
"POLYGON((21 1,24 2,23 4,20 3,21 1))",blue
      </Parameter>
    </Datasource>
  </Layer>

</Map>

Example 64. BuildingSymbolizer fill opacity

<?xml version="1.0" encoding="utf-8"?>
<Map background-color="white">

  <Style name="style">
    <Rule>
      <BuildingSymbolizer height="1" fill="red" fill-opacity="[opacity]"/>
      <TextSymbolizer face-name="DejaVu Sans Book" allow-overlap="true" dy="50">[opacity]</TextSymbolizer>
    </Rule>
  </Style>

  <Layer name="layer">
    <StyleName>style</StyleName>
    <Datasource>
      <Parameter name="type">csv</Parameter>
      <Parameter name="inline">
wkt,opacity
"POLYGON(( 1 1, 4 2, 3 4, 0 3, 1 1))",0.2
"POLYGON((11 1,14 2,13 4,10 3,11 1))",0.5
"POLYGON((21 1,24 2,23 4,20 3,21 1))",0.8
      </Parameter>
    </Datasource>
  </Layer>

</Map>

Example 65. BuildingSymbolizer height

<?xml version="1.0" encoding="utf-8"?>
<Map background-color="white">

  <Style name="style">
    <Rule>
      <BuildingSymbolizer height="[height]"/>
      <TextSymbolizer face-name="DejaVu Sans Book" allow-overlap="true" dy="50">[height]</TextSymbolizer>
    </Rule>
  </Style>

  <Layer name="layer">
    <StyleName>style</StyleName>
    <Datasource>
      <Parameter name="type">csv</Parameter>
      <Parameter name="inline">
wkt,height
"POLYGON(( 1 1, 4 2, 3 4, 0 3, 1 1))",1
"POLYGON((11 1,14 2,13 4,10 3,11 1))",2
"POLYGON((21 1,24 2,23 4,20 3,21 1))",3
      </Parameter>
    </Datasource>
  </Layer>

</Map>