Allows classifications against datasets. Every Layer object MUST have a CLASS object.
If you are using MapInfo TAB files you have a STYLEITEM “auto” option in the Layer object. In this case you have a simple empty CLASS END item.
Element | Description | Example |
|---|---|---|
NAME | OPTIONAL – used when showing Legends as title. | “More than 30” |
EXPRESSION | Expressions are very powerful. You can use Regular Expressions, SQL Like expressions or simply an attribute value. See following for more info: | EXPRESSION ([Total] < 6) EXPRESSION /^(REAR OF|ACCESS)/ EXPRESSION "2005" |
MapServer allows you to define styles for features. These can be stacked on top of each other. | ||
The Label class can allow for multiple columns to form an Expression for the label. |
Complex class against a single layer. Defining which features should be labeled and which shouldn’t.
CLASS
NAME "NoStreetLabels"
EXPRESSION /^(REAR OF|ACCESS)/ #words WITH attribute defined by LAYER -> CLASSITEM
STYLE
COLOR 192 192 192
SYMBOL 'continue'
SIZE 5
ANTIALIAS TRUE
END
STYLE
COLOR 255 255 255
SYMBOL 'continue'
SIZE 3
ANTIALIAS TRUE
END
END
CLASS
NAME "StreetLabels"
STYLE
COLOR 192 192 192
SYMBOL 'continue'
SIZE 5
ANTIALIAS TRUE
END
STYLE
COLOR 255 255 255
SYMBOL 'continue'
SIZE 3
ANTIALIAS TRUE
END
LABEL
FONT "arial"
TYPE TRUETYPE
ANTIALIAS TRUE
COLOR 40 40 40
OUTLINECOLOR 255 255 255
SIZE 7
POSITION AUTO
PARTIALS FALSE
#MINDISTANCE 800
BUFFER 4
ANGLE AUTO
END
END