[mapserver-users] LABEL POSITION - Numeric or String from a database

[Donald Kerr]

Tommaso,

There are already 30 classes, each with their own attributes, some of which
also come from the database (see example below). I don't think I can also
use CLASSITEM and two EXPRESSIONs. 

=======================================================
LABELITEM textstring

CLASS
	# Building
	EXPRESSION ([featurecode] = 10020)
	LABEL
		TYPE truetype
		FONT arial
		SIZE [height]
		POSITION cc
		#POSITION [AnchorPositionTxt]
		COLOR [oscolor]
		ANTIALIAS TRUE
		ANGLE [orientation]
		FORCE TRUE
	END # LABEL
END # CLASS
=======================================================

Regards,

Donald


-----Original Message-----
From: tommaso [mailto:tommasodb at googlemail.com] 
Sent: 21 November 2010 13:59
To: Donald Kerr
Cc: mapserver-users at lists.osgeo.org
Subject: Re: [mapserver-users] LABEL POSITION - Numeric or String from a
database


Hallo Donald,

you can define a layer with so many classes how are your possible label
positions and filter each class with the value of the attribute
"AnchorPositionTxt"

i.e:

LAYER

  NAME "layer"
  ...
  ...
  CLASSITEM "AnchorPositionTxt"
  LABELITEM "name"
  CLASS
    EXPRESSION "ul"
    LABEL
        POSITION ul
        ...
    END
  END
  CLASS
    EXPRESSION "lr"
    LABEL
        POSITION lr
        ...
    END
  END
END

Cheers,
Tommaso

On Sun, 2010-11-21 at 10:21 +0000, Donald Kerr wrote: 
Hi List,

I am trying to change a LABEL's POSITION by using an integer without
success.

As far as I can see, the LABEL's POSITION can be any one of the following
constants: enum MS_POSITIONS_ENUM {MS_UL=101, MS_LR, MS_UR, MS_LL, MS_CR,
MS_CL,
MS_UC, MS_LC, MS_CC, MS_AUTO, MS_XY , MS_FOLLOW};

I was assuming that I can replace UL with "101" i.e. instead of "POSITION
UL" I use "POSITION 101" but that doesn't work.

I have also tried replacing "POSITION UL" with text values from a database
i.e. "POSITION [AnchorPositionTxt]" where "AnchorPositionTxt" is a string
'UL' but, again, that doesn't work.

Is there a way to set this value dynamically from the database with either
numbers or strings ('UL', LR, etc...)?

Many thanks.

Regards,

Donald Kerr

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