Converting values returned my mapserver
A.Versteegen at BOM.GOV.AU
Wed Nov 29 16:27:14 EST 2006
Thanks Steve, I will add a column when building the shapefile.
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.
> >>> 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:
> LABELITEM ("Max_Wnd_Gus" * 1.85) - gives an error,
> EXPRESSION ([Max_Wnd_Gus] * 1.85) - returns true, the values are
> TEXT ('[Max_Wnd_Gus] * 1.85' km/h) - displays '<value> * 1.85' km/h
> Any ideas?
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