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2.9. 在 Mapfile 中使用自定义样式

矢量数据可以分为三种类型：点、线和面。数据类型结构的简单性提供了表达的多样性。在MapServer中，可以设置各种尺寸的样式，例如点、线和曲面的颜色、大小(厚度)和透明度。

2.9.1. 点

使用的Mapfile为：

MAP
    IMAGETYPE "PNG"
    EXTENT -180 -90 180 90
    SIZE 600 300
    SHAPEPATH "/gdata"
    IMAGECOLOR 255 255 255
    SYMBOL
        NAME "circle"
        TYPE ELLIPSE
        FILLED TRUE
        POINTS
            10 10
        END
    END
    LAYER
        NAME "world-country"
        DATA "wcountry.shp"
        STATUS OFF
        TYPE POLYGON
        CLASS
            NAME "The Upper Great Lakes States"
            STYLE
                COLOR 232 232 232
                OUTLINECOLOR 32 32 32
            END
        END
    END
    LAYER
        NAME "world-city"
        DATA "world/cities.shp"
        STATUS OFF
        TYPE POINT
        CLASS
            NAME "cities"
            SYMBOL "circle"
            SIZE 6
            COLOR 0 0 0
        END
    END
END

2.9.2. 线条填充示例

使用的Mapfile为：

MAP
    IMAGETYPE "PNG"
    EXTENT -180 -90 180 90
    SIZE 600 300
    SHAPEPATH "/gdata"
    IMAGECOLOR 255 255 255
    SYMBOL
        NAME "hatch-test"
        TYPE HATCH
    END
    LAYER
        NAME "world-country"
        DATA "wcountry.shp"
        STATUS OFF
        TYPE POLYGON
        CLASS
            NAME "The Upper Great Lakes States"
            STYLE
                SYMBOL "hatch-test"
                COLOR 255 0 0
                ANGLE 45
                SIZE 10
                WIDTH 3
            END
        END
    END
END

2.9.3. 圆形填充示例

使用的Mapfile为：

MAP
    IMAGETYPE "PNG"
    EXTENT -180 -90 180 90
    SIZE 600 300
    SHAPEPATH "/gdata"
    IMAGECOLOR 255 255 255
    SYMBOL
        NAME "circle"
        TYPE ELLIPSE
        FILLED TRUE
        POINTS
            1 1
        END
    END
    LAYER
        NAME "world-country"
        DATA "wcountry.shp"
        STATUS OFF
        TYPE POLYGON
        CLASS
            NAME "The Upper Great Lakes States"
            STYLE
                SYMBOL "circle"
                COLOR 255 0 0
                ANGLE 45
                SIZE 10
                WIDTH 3
            END
        END
    END
END

2.9.4. 河水风貌

使用的Mapfile为：

MAP
    IMAGETYPE "PNG"
    EXTENT -180 -90 180 90
    SIZE 600 300
    SHAPEPATH "/gdata"
    IMAGECOLOR 255 255 255
    FONTSET "../fonts/fonts.list"
    WEB
        METADATA
            "wms_title" "WMS Demo Server"
            "wms_onlineresource" "//webgis.cn/cgi-bin/mapserv?map=/owg/mfb1.map&"
            "ows_onlineresource" "//webgis.cn/cgi-bin/mapserv?map=/owg/mfb1.map&"
            "wms_srs" "EPSG:4269 EPSG:4326"
            "wms_enable_request" "* !GetFeatureInfo"
        END
    END
    PROJECTION
        "init=epsg:4326"
    END
    LAYER
        NAME "states_poly"
        DATA "wcountry.shp"
        STATUS OFF
        TYPE POLYGON
        LABELITEM "NAME"
        CLASS
            NAME "States"
            STYLE
                COLOR 232 232 232
            END
        END
    END
    LAYER
        NAME "states_line"
        DATA "wcountry.shp"
        STATUS OFF
        TYPE LINE
        CLASS
            NAME "State Boundary"
            STYLE
                COLOR 132 132 32
            END
        END
    END
    LAYER
        NAME "wriver"
        DATA "wriver.shp"
        STATUS OFF
        TYPE LINE
        CLASS
            NAME "World River"
            STYLE
                COLOR 0 0 255
            END
        END
    END
    LAYER
        NAME "wroads"
        DATA "wroads.shp"
        STATUS OFF
        TYPE LINE
        CLASS
            NAME "World Road"
            STYLE
                COLOR 100 100 100
                WIDTH 1
                LINECAP BUTT
                PATTERN
                    10 5
                    5 10
                END
            END
        END
    END
END

GepMap 可以进一步使用以获得放大效果：

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2.10. 定义投影和范围