Page Comparison

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Description

Layer snippet

Thumbs

Variable points styles depending on the scale of the map

Code Block

language	bash

		CLASS
			NAME ""
			MAXSCALEDENOM 50000
			STYLE
				SYMBOL "square"
				COLOR 255 128 0
				OUTLINECOLOR 255 255 255
				SIZE 16
			END
			STYLE
				SYMBOL "C"
				COLOR 255 255 255
				SIZE 10
			END
			LABEL
				FONT "verdana"
				TYPE truetype
				SIZE 8
				POSITION UC
				COLOR 255 128 0
				OUTLINECOLOR 255 255 255
				OUTLINEWIDTH 3
				BUFFER 10
				MAXSCALEDENOM 10000
			END		
		END

A little more complexity, if boundaries are too complex then transform the geometries (GEOMTRANSFORM) to their centroids at a certain scale

Other options include (from MapServer site)

Used to indicate that the current feature will be transformed before the actual style is applied. Introduced in version 5.4.

bbox: produces the bounding box of the current feature geometry.
centroid: produces the centroid of the current feature geometry.
end: produces the last point of the current feature geometry.
labelpnt: used for LABEL styles. Draws a marker on the geographic position the label is attached to.
labelpoly: used for LABEL styles. Produces a polygon that covers the label plus a 1 pixel padding.
start: produces the first point of the current feature geometry.
vertices: produces all the intermediate vertices (points) of the current feature geometry (the start and end are excluded).
<expression>: Applies the given expression to the geometry. Supported expressions:
- (buffer([shape],dist)): Buffer the geometry ([shape]) using dist pixels as buffer distance.
- (simplify([shape],tolerance)): simplifies a geometry ([shape]) .
- (simplifypt([shape],tolerance)): simplifies a geometry ([shape])
- (generalize([shape],tolerance)): simplifies a geometry
- (smoothsia([shape], smoothing_size, smoothing_iteration, preprocessing)): will smooth a geometry ([shape]) using the SIA algorithm
Example (polygon data set) - draw a two pixel wide line 5 pixels inside the boundary of the polygon:
Code Block
language bash
STYLE OUTLINECOLOR 255 0 0 WIDTH 2 GEOMTRANSFORM (buffer([shape],-5)) END

Code Block

language	bash

		CLASS
			NAME "Postcode Areas"
			MAXSCALEDENOM 20000
			STYLE
				SYMBOL "circle"
				SIZE 6
				GAP 6
				COLOR 196 0 0
				OPACITY 60
			END
			STYLE
				OUTLINECOLOR 196 0 0
				WIDTH 2
				OPACITY 60
			END
			LABEL
				FONT "verdana"
				TYPE truetype
				SIZE 8
				POSITION UC
				COLOR 196 0 0
				OUTLINECOLOR 255 255 255
				OUTLINEWIDTH 3
				MAXLENGTH 12
				WRAP ","
				ALIGN CENTER
				BUFFER 10
				MAXSCALEDENOM 10000
			END		
		END
		CLASS
			NAME "Postcode Points"
			STYLE
				MINSCALEDENOM 20000
				SYMBOL "circle"
				GEOMTRANSFORM CENTROID
				COLOR 196 0 0
				OUTLINECOLOR 255 255 255
				SIZE 6
			END
		END	
	END

Clusters

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Description

Snippet

Thumb

CLUSTERS

This layer is combined with the hw_road_accidents layer it is purely for display purposes highlighting some of the advanced functionality of MapServer

Note the class Accident Clusters in the layer hw_road_accidents - the second class isn't used for map display (due to MAXSCALEDENOM) but is here for the GetLegendGraphic request

Code Block

title	Cluster layer - hw_road_accidents_display
linenumbers	true
collapse	true

	LAYER 
		NAME "hw_road_accidents_display"
		REQUIRES "[hw_road_accidents]"
		STATUS DEFAULT
		TYPE POINT
		INCLUDE "datashare.inc"
		DATA "wkb_geometry from 
			(select * from upload_multi.ecc_road_acc) as foo
			 using unique ogc_fid using srid=27700"
		LABELITEM "Cluster:FeatureCount"
		CLASSITEM "Cluster:FeatureCount"
		CLUSTER
			MAXDISTANCE 50
			REGION "rectangle"
		END
		MINSCALEDENOM 25000
		CLASS
			NAME "Road Accidents"
			EXPRESSION ("[Cluster:FeatureCount]" == "1")
			STYLE
				SYMBOL "circle"
				SIZE 8
				COLOR 255 255 255
				OUTLINECOLOR 40 40 40
				WIDTH 2
			END
		END
		CLASS
			EXPRESSION ([Cluster:FeatureCount]>100 )
			NAME "Road Accidents"
			STYLE
				SYMBOL "circle"
				SIZE 50
				OUTLINECOLOR 0 0 0
				WIDTH 6
				OPACITY 10
			END	
			STYLE
				SYMBOL "circle"
				SIZE 40
				OUTLINECOLOR 0 0 0
				WIDTH 6
				OPACITY 30
			END			
			STYLE
				SYMBOL "circle"
				SIZE 32
				COLOR 255 255 255
				OUTLINECOLOR 40 40 40
				WIDTH 3
			END
			LABEL
				FONT "arialbd"
				TYPE truetype
				SIZE 10
				COLOR 0 0 0
				OUTLINECOLOR 255 255 255
			END
		END
		CLASS
			EXPRESSION ([Cluster:FeatureCount]>50 
				AND [Cluster:FeatureCount]<100 )
			NAME "Street crime"
			STYLE
				SYMBOL "circle"
				SIZE 40
				#COLOR 255 255 255
				OUTLINECOLOR 0 0 0
				WIDTH 6
				OPACITY 10
			END	
			STYLE
				SYMBOL "circle"
				SIZE 32
				#COLOR 255 255 255
				OUTLINECOLOR 0 0 0
				WIDTH 6
				OPACITY 30
			END			
			STYLE
				SYMBOL "circle"
				SIZE 24
				COLOR 255 255 255
				OUTLINECOLOR 40 40 40
				WIDTH 3
			END
			LABEL
				FONT "arialbd"
				TYPE truetype
				SIZE 8
				COLOR 0 0 0
				#OUTLINECOLOR 255 255 255
			END
		END
		CLASS
			EXPRESSION ([Cluster:FeatureCount]>20 
				AND [Cluster:FeatureCount]<50 )
			NAME "Street crime"
			STYLE
				SYMBOL "circle"
				SIZE 30
				COLOR 255 255 255
				OUTLINECOLOR 0 0 0
				WIDTH 6
				OPACITY 10
			END	
			STYLE
				SYMBOL "circle"
				SIZE 24
				COLOR 255 255 255
				OUTLINECOLOR 0 0 0
				WIDTH 6
				OPACITY 30
			END			
			STYLE
				SYMBOL "circle"
				SIZE 16
				COLOR 255 255 255
				OUTLINECOLOR 40 40 40
				WIDTH 3
			END
			LABEL
				FONT "arialbd"
				TYPE truetype
				SIZE 8
				COLOR 0 0 0
				OUTLINECOLOR 255 255 255
			END
		END
		CLASS
			EXPRESSION ([Cluster:FeatureCount]<20)
			NAME "Street crime"
			STYLE
				SYMBOL "circle"
				SIZE 26
				COLOR 255 255 255
				OUTLINECOLOR 0 0 0
				WIDTH 6
				OPACITY 10
			END	
			STYLE
				SYMBOL "circle"
				SIZE 20
				COLOR 255 255 255
				OUTLINECOLOR 0 0 0
				WIDTH 6
				OPACITY 30
			END			
			STYLE
				SYMBOL "circle"
				SIZE 16
				COLOR 255 255 255
				OUTLINECOLOR 40 40 40
				WIDTH 3
			END
			LABEL
				FONT "arialbd"
				TYPE truetype
				SIZE 8
				COLOR 0 0 0
				OUTLINECOLOR 255 255 255
			END
		END
	END

Code Block

title	hw_road_accidents
linenumbers	true

	LAYER 
		NAME "hw_road_accidents"
		STATUS OFF
		TYPE POINT
		INCLUDE "datashare.inc"
		DATA "wkb_geometry from 
			(select * from upload_multi.ecc_road_acc) as foo
			 using unique ogc_fid using srid=27700"
		TOLERANCE 100
		UNITS PIXELS
		CLASS
			NAME "Actual accidents"
			STYLE
				MAXSCALEDENOM 25000
				SYMBOL "circle"
				SIZE 5
				COLOR 255 0 0 
			END			
		END
		CLASS
			NAME "Accident clusters"
			MAXSCALEDENOM 1
			STYLE
				SYMBOL "circle"
				SIZE 26
				COLOR 255 255 255
				OUTLINECOLOR 0 0 0
				WIDTH 6
				OPACITY 10
			END	
			STYLE
				SYMBOL "circle"
				SIZE 20
				COLOR 255 255 255
				OUTLINECOLOR 0 0 0
				WIDTH 6
				OPACITY 30
			END			
			STYLE
				SYMBOL "circle"
				SIZE 16
				COLOR 255 255 255
				OUTLINECOLOR 40 40 40
				WIDTH 3
			END
		END		
	END

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Versions Compared

Old Version 50

New Version 51

Key

Clusters