CLASSITEM and EXPRESSION for a float field

Steve Lime Steve.Lime at DNR.STATE.MN.US
Wed Jun 28 15:45:06 PDT 2006


In this case you are doing a straight string comparison. I believe for shapefiles the double to string conversion respects the number of decimal places defined for the field. So if you have 5 decimal places you'll need:

  EXPRESSION '9.00000'

Steve

>>> Luca Manganelli <luca76 at GMAIL.COM> 06/28/06 3:56 AM >>>
Hi, I'm attempting to use the EXPRESSION for a float field, but I
don't know the right manner.

I.e.:

LAYER
    NAME 'test'
    ...
    CLASSITEM 'floatfield'
    ....
    CLASS
            NAME "testclass1"
            EXPRESSION '9'
            ...
    END
END

my mapserver doesn't view the objects with EXPRESSION '9', so I
suspect that the '9' is not right (I tried with '9.0', too).

Any idea?



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