Converting values returned my mapserver

[Adrian Versteegen]

Thanks Steve, I will add a column when building the shapefile.

Cheers
Adrian

On Wed, 2006-11-29 at 00:18 -0600, Steve Lime wrote:
> I'm sorry but what you're trying to do isn't possible with MapServer as
> it sits. You
> have to pre-compute the km/hr values in another column.
> 
> Steve
> 
> >>> Adrian Versteegen <A.Versteegen at BOM.GOV.AU> 11/28/06 5:08 PM >>>
> Apologies if this is a duplicate message, the original seemed to be 
> rejected by the listserv server..
> 
> We have weather observations with the wind speed values in the shapefile
> in knots. Our customer wants the values displayed in km/h.
> 
> I am using a cgi/wms arrangement and have tried various combinations of
> LABELITEM, EXPRESSION and TEXT to multiply the [Max_Wnd_Gus] attribute
> by the conversion constant, so the following options in the map file
> tried individually or collectively give the results shown:
> 
> LAYER
>   LABELITEM ("Max_Wnd_Gus" * 1.85) -  gives an error,
>   ...
> 
>   CLASS
>     EXPRESSION ([Max_Wnd_Gus] * 1.85) - returns true, the values are
> displayed,
>     TEXT ('[Max_Wnd_Gus] * 1.85' km/h) - displays '<value> * 1.85' km/h
> 
> Any ideas?
> 
> Thanks,
> Adrian