看到一篇博文，通過SLD來完成3D效果的，記得在OSM的站點上看到過這樣的配置，還是值得一看的。轉自：http://xml.iteye.com/blog/1666190

1. <FeatureTypeStyle>  
2.   <Rule>  
3.     <PolygonSymbolizer>  
4.       <Geometry>  
5.         <ogc:Function
    name="isometric">  
6.           <ogc:PropertyName>geom</ogc:PropertyName>  
7.           <ogc:Literal>7</ogc:Literal>  
8.         </ogc:Function>  
9.       </Geometry>  
10.       <Fill>  
11.         <CssParameter name="fill">#dddddd</CssParameter>  
12.       </Fill
    >  
13.       <Stroke>  
14.         <CssParameter name="stroke">#999999</CssParameter>  
15.       </Stroke>  
16.     </PolygonSymbolizer>  
17.   </Rule>  
18. </FeatureTypeStyle>  

1. <FeatureTypeStyle>  
2.   <Rule>  
3.     <PolygonSymbolizer>  
4.       <
   Geometry>  
5.          <ogc:Function name="offset">  
6.             <ogc:PropertyName>geom</ogc:PropertyName>  
7.             <ogc:Literal>0</ogc:Literal>  
8.             <ogc:Literal>7</ogc:Literal>  
9.          </ogc:Function>  
10.       </Geometry>  
11.       <Fill>  
12.         <CssParameter name="fill">#FFDCC7</CssParameter>  
13.       </Fill>  
14.       <Stroke>  
15.         <CssParameter name="stroke">#999999</CssParameter>  
16.       </Stroke>  
17.     </PolygonSymbolizer>  
18.   </Rule>  
19. </FeatureTypeStyle>  

1. <?xml version="1.0" encoding="ISO-8859-1"?>  
2. <StyledLayerDescriptor version="1.0.0"   
3.     xsi:schemaLocation="http://www.opengis.net/sld StyledLayerDescriptor.xsd"   
4.     xmlns="http://www.opengis.net/sld"   
5.     xmlns:ogc="http://www.opengis.net/ogc"   
6.     xmlns:xlink="http://www.w3.org/1999/xlink"   
7.     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">  
8.     <!-- a Named Layer is the basic building block of an SLD document -->  
9.     <NamedLayer>  
10.         <Name>default_polygon</Name>  
11.         <UserStyle>  
12.             <!-- Styles can have names, titles and abstracts -->  
13.             <Title>Default Polygon</Title>  
14.             <Abstract>A sample style that draws a polygon</Abstract>  
15.             <!-- FeatureTypeStyles describe how to render different features -->  
16.             <!-- A FeatureTypeStyle for rendering polygons -->  
17.             <FeatureTypeStyle>  
18.                 <Rule>  
19.                     <PolygonSymbolizer>  
20.                         <Geometry>  
21.                             <ogc:Function name="isometric">  
22.                                 <ogc:PropertyName>the_geom</ogc:PropertyName>  
23.                                 <ogc:Literal>5</ogc:Literal>  
24.                             </ogc:Function>  
25.                         </Geometry>  
26.                         <Fill>  
27.                             <CssParameter name="fill">#dddddd</CssParameter>  
28.                         </Fill>  
29.                         <Stroke>  
30.                             <CssParameter name="stroke">#999999</CssParameter>  
31.                             <CssParameter name="stroke-width">0.1</CssParameter>  
32.                         </Stroke>  
33.                     </PolygonSymbolizer>  
34.                 </Rule>  
35.             </FeatureTypeStyle>  
36.             <FeatureTypeStyle>  
37.                 <Rule>  
38.                     <PolygonSymbolizer>  
39.                         <Geometry>  
40.                             <ogc:Function name="offset">  
41.                                 <ogc:PropertyName>the_geom</ogc:PropertyName>  
42.                                 <ogc:Literal>0</ogc:Literal>  
43.                                 <ogc:Literal>5</ogc:Literal>  
44.                             </ogc:Function>  
45.                         </Geometry>  
46.                         <Fill>  
47.                             <CssParameter name="fill">#cccccc</CssParameter>  
48.                         </Fill>  
49.                         <Stroke>  
50.                             <CssParameter name="stroke">#999999</CssParameter>  
51.                             <CssParameter name="stroke-width">0.1</CssParameter>  
52.                         </Stroke>  
53.                     </PolygonSymbolizer>  
54.                 </Rule>  
55.             </FeatureTypeStyle>  
56.         </UserStyle>  
57.     </NamedLayer>  
58. </StyledLayerDescriptor>