[mapserver-users] performance question - labeling roads with shields

[Mark Volz]

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



-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.osgeo.org/pipermail/mapserver-users/attachments/20120110/f928ee80/attachment.html