[mapserver-users] Road shields on Mapserver 7

[Björn Danielsson]

Interesting discussion!
I have an issue with geotransform 'labelpnt' I so far have failed to solve.

Consider a line that depicts a creek. Sometimes it is important to show the 
direction of flow. That is mostly achieved on maps by placing arrows along 
the creek showing which way the water flows.

I have tried to use LABEL and GEOMTRANSFORM 'labelpoint' with an arrow 
symbol and where the label has no text but has REPEATDISTANCE and ANGLE. 
Problem is that the symbol is not affected by ANGLE ( neither FOLLOW, AUTO 
or AUTO2 ). Does anybody know how to rotate labelpoint symbols or is it not 
possible?.

Plan B is to use a LABEL with TEXT = ">" which works fine but is not that 
elegant.

Björn D
-----Original Message-----
From: lars.schylberg at blixtmail.se
To: mapserver-users at lists.osgeo.org
Date: Thu, 23 Feb 2017 21:15:36 +0100
Subject: Re: [mapserver-users] Road shields on Mapserver 7


Hi,

I more detail in my previous example the offset in the style block is 
because the example is part of a block with three road shields stacked.

/Lars S.

One single shield would be like this:

LABEL
                EXPRESSION ('[VAGNR1]' ~ '^[0-9][0-9]$' )
                # Blue two digits
                STYLE
                    GEOMTRANSFORM "labelpnt"
                    SYMBOL VAGNRBOX
                    COLOR 64 168 217
                    SIZE 10
                END
                TEXT '[VAGNR1]'
                FONT 'sc'
                TYPE truetype
                POSITION cc
                COLOR 255 255 255
                SIZE 7
                # FORCE: TRUE
                REPEATDISTANCE 150
                MINDISTANCE 300
                PRIORITY 2
            END


-----Originalmeddelande-----
Från: lars.schylberg at blixtmail.se [mailto:lars.schylberg at blixtmail.se]
Till: mapserver-users at lists.osgeo.org 
[mailto:mapserver-users at lists.osgeo.org]
Datum: 2017-02-23 21:04
Ämne: Re: [mapserver-users] Road shields on Mapserver 7


Hi,

This is how I do it in MS7.0.  This is just part of the class with the first 
two labels.  I have different shield depending on the number of digits.
I also have different color depending on the color of the shield.  This is 
following European road label standard.

/Lars S

        CLASS
            EXPRESSION ("[VAGNR1]" ~ "^[E0-9]*$" AND "[VAGNR2]" ~ 
"^[E0-9]*$" AND "[VAGNR3]" ~ "^[E0-9]*$"  )
            LABEL
                EXPRESSION ('[VAGNR1]' ~ '^E.$')
                # first shield - green - one digit
                STYLE
                    GEOMTRANSFORM "labelpnt"
                    SYMBOL VAGNRBOX
                    COLOR 115 179 115
                    OFFSET 0 -13
                    SIZE 10
                END
                TEXT '[VAGNR1]'
                FONT 'sc'
                TYPE truetype
                POSITION CC
                COLOR 255 255 255
                SIZE 7
                OFFSET 0 -13
                REPEATDISTANCE 100
                MINDISTANCE 100
                PRIORITY 9
                FORCE GROUP
            END
            LABEL
                EXPRESSION ('[VAGNR1]' ~ '^E..$')
                # first shield - green - two digits
                STYLE
                    GEOMTRANSFORM "labelpnt"
                    SYMBOL VAGNRBOX_3TKN
                    COLOR 115 179 115
                    OFFSET 0 -13
                    SIZE 10
                END
                TEXT '[VAGNR1]'
                FONT 'sc'
                TYPE truetype
                POSITION CC
                COLOR 255 255 255
                SIZE 7
                OFFSET 0 -13
                REPEATDISTANCE 100
                MINDISTANCE 100
                PRIORITY 9
                FORCE GROUP
            END_______________________________________________
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