Hi Mark: With the changes in label styles in 6.0 you should be able to combine
the layers, for example:
LAYER
NAME 'major_roads'
...
CLASS
NAME 'Interstates'
STYLE # orange lines with a brownish outline
WIDTH 4 MAXWIDTH 8 MINWIDTH 4
COLOR 242 191 36
OUTLINECOLOR 187 176 157
OUTLINEWIDTH 1
END
LABEL
TYPE TRUETYPE
SIZE 7
...
STYLE
SYMBOL 'interstate_shield.png'
END
END
END
END
That should be all there is to it- all in one pass.
Steve
From: [email protected]
[mailto:[email protected]] On Behalf Of Mark Volz
Sent: Tuesday, January 10, 2012 1:37 PM
To: [email protected]
Subject: [mapserver-users] performance question - labeling roads with shields
Hello,
On my Application I currently am using two layers to draw my roads. The first
one is a line layer that draws the road itself. The second is a annotation
layer that draws the labels and the road shields. Both layers have the same
source dataset. My concern is that my application is taking a performance hit
since the road file is being read twice.
If there is a performance hit by reading the same data file twice, is there a
way combine the line layer and annotation layer into a single layer that has
both the road symbology, and labels that have shields?
Layer Roads
...
DATA MyRoads
TYPE LINE
CLASS
NAME 'State Highway'
EXPRESSION "A20"
STYLE
COLOR 0 0 0
SYMBOL 'plainline'
SIZE 5
END #style
STYLE
SYMBOL 'plainline'
SIZE 1
COLOR 255 0 0
END #style
END #class
...
END #LAYER
Layer RoadLabels
...
Data MyRoads
TYPE ANNOTATION
CLASS
TEXT ([ROADNUM])
EXPRESSION 'A20'
SYMBOL './symbols/STHWY.png'
LABEL
type truetype # AGG required
size 7 #for AGG
ANTIALIAS TRUE
FONT vera_sans #for AGG
MINFEATURESIZE 25
MINDISTANCE 200
COLOR 254 254 254
END #LABEL
END #CLASS
END #Layers
Thank You
Mark Volz
GIS Specialist
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