[Mapserver-users] html legend - strange behaviour

[Möri Cédric]

Hi list!

as i'm still investigating about my msyyparse()-parse error (see older mails
below), I found a rather strange behaviour of the html legend:

I have layer with 5 classes like this:
CLASS
  NAME "Ag"
  EXPRESSION ([COLOR] = 4)
  STYLE	  
    SIZE 3
    SYMBOL 7
    COLOR 0 255 255
  END
END
CLASS
  NAME "Bh"
  EXPRESSION ([COLOR] = 5)
  STYLE
    SIZE 3
    SYMBOL 7
    COLOR 100 0 255
  END 
END
CLASS
  NAME "Cg"
  EXPRESSION ([COLOR] = 40)
  SIZE 3	  
  SYMBOL 7
  COLOR 255 140 0
END
CLASS
  NAME "Dh"
  EXPRESSION ([COLOR] = 1)
  SIZE 3
  SYMBOL 7
  COLOR 255 50 0
  END
CLASS
  NAME "Passstrassen"
  EXPRESSION ([COLOR] = 6)
  SIZE 3
  SYMBOL 'bahnlinie overlay'
  #SYMBOL 7
  COLOR 255 0 255
END

The map renders perfect. All the colors are assigned to the right lines. But
in the html legend the colors are wrong. Class Ag is light blue - correct,
then classes Bh to Dh are also light blue - wrong!. The class "Passstrassen"
is again correct.

If I switch to a "normal" gif legend, everything appears correct!

Here is also my legendtemplate:

   [leg_class_html visibility_flag=15]
     <tr valign="top">
      <td><img src=[leg_icon]></td><td> [leg_class_name]</td>
     </tr>
   [/leg_class_html]

The same mapfile and legendtemplate worked fine in the 3.6.6-Mapserver
Version.

Anyone an idea, what is going on here? Is this the same issue as my suddenly
poping of msyyparse-error as an error in the expression parsing? Is it
something funky with my data?

Any hint would be appreciated!
best regards

Cédric

PS: Working with MapServer4.0.1/postgreSQL7.4.2/postgis0.8.1. The system is
running under Linux RH7.2

> -----Original Message-----
> From: Steve Lime [mailto:steve.lime at dnr.state.mn.us]
> Sent: Monday, March 22, 2004 5:38 PM
> To: Cedric.Moeri at bd.so.ch; mapserver-users at lists.gis.umn.edu
> Subject: Re: [Mapserver-users] msyyparse() - parse error
> 
> 
> Hi there: Msyyparse() is the function that evaluates 
> MapServer expressions. There
> are 3 possibilities: 
> 
> 1) There is an error in the expression you're using.
> 2) There is something funky in your data, that breaks an expression.
> 3) There is an error in the code itself.
> 
> Although 1) and 3) are possible they seem unlikely. My guess 
> is that there is an
> issue with certain data values and the expressions. One 
> example would be
> data values containing embeded quotes. Let's say you had a place name
> called O'Reilly and where using an expression like:
> 
> ('[placename]' = 'foo') which would become in the case of O'Reilly,
> 
> ('O'Reilly' = 'foo') and this would cause a parse error. 
> 
> Could also happen with numeric fields that didn't contain 
> numbers or are empty.
> We'd really need to see your mapfile to make the call.
> 
> Steve
> 
> >>> Möri Cédric <Cedric.Moeri at bd.so.ch> 3/22/2004 4:27:42 AM >>>
> Hello list!
> 
> we recently upgraded our systems from
> MapServer3.6.6/postgreSQL7.2.4/postgis0.8.0 to
> MapServer4.0.1/postgreSQL7.4.2/postgis0.8.1. The system is 
> running under
> Linux RH7.2.
> 
> Now i'm reciving sometimes this strange error "msyyparse(): Expression
> parser error. parse error".
> (In the old version, everyting worked perfect!)
> 
> I'm not able to reproduce this error regularly. Sometimes it 
> triggers when
> i'm switching some layers on/off, sometimes it triggers when 
> i'm just paning
> (same layer-set/same scale). Sometimes it triggers only one 
> time, othertimes
> up to 60 times with still the same mapfile. 
> 
> I read from the archives that there might be some issue about 
> the querrying
> in postgis but there is not much more.
> 
> So I guess I'm stuck. Has anybody a hint for me in which 
> direction to go on
> with my quest? May anybody explain what the msyyparse does, 
> and when it is
> called?
> 
> Any hint would be appreciated!
> If needed I would be glad to provide further information.
> 
> best regards
> mit freundlichen Grüssen
> 
> Cédric Möri
> 
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