[mapserver-users] Symbol not showing up in MapServer 6.0.0-beta1 release

[Anzel, Phil - Fort Collins, CO]

Hi, Thomas,

Thanks for looking into this problem. 

My goal is to create a "railroad" cross-hatching along a line. I originally used:
    SYMBOL
      NAME 'default'
      Type simple
    END
    SYMBOL
      NAME 'tie'
      TYPE vector
      POINTS 0 0  0 7  -99 -99  7 0  7 7  END
    END
These were referenced, within a layer of type "line", by:
   CLASS
     STYLE
       SYMBOL            'default'
       SIZE              1
       COLOR             0 0 0
     END
     STYLE
      SYMBOL             'tie'
      SIZE               8
      COLOR              0 0 0
     END
   END

This had worked under MapServer 5.6.3. I returned to this example after upgrading to 5.7DEV on March 9, 2011, and found that the "tie" cross-hatching had disappeared. I tried several other symbols; I used the "circle" as an example because it also worked in the past and is used in the MapServer "Introduction to MapServer", section 2.4.3, "CLASS and STYLE objects".

Closer to the 2.4.3 example, if I define:
  symbol
    name 'circle'
    filled true
    type ellipse
    points 0 0 1 1 end
  end
and reference this definition, as per the example, with:
     style
       symbol "circle"
       color 178 114 1
       size 15
     end
     style
       symbol "circle"
       color 254 161 0
       size 7
     end
then there is no image created.

Given these experimental results, I wonder if there has been a change in behavior in drawing symbols. Alternatively I've made a very simple error.

Is there an error in my map file? How do you recommend that the "railroad" hatched line be drawn?

Thanks again.

- Phil


-----Original Message-----
From: thomas bonfort [mailto:thomas.bonfort at gmail.com] 
Sent: Friday, March 11, 2011 4:17 AM
To: Anzel, Phil - Fort Collins, CO
Cc: mapserver-users at lists.osgeo.org
Subject: Re: [mapserver-users] Symbol not showing up in MapServer 6.0.0-beta1 release

huh, I may have misinterpreted...

you can't expect to obtain a point/marker symbology when using a line geometry.

if you effectively want to use marker symbols, you can have a look RFC
48 and its
 GEOMTRANSFORM "start|end|vertices" transformations.

--
thomas

On Fri, Mar 11, 2011 at 12:10, thomas bonfort <thomas.bonfort at gmail.com> wrote:
> Phil,
>
> what kind of symbology are you trying to obtain. I suspect you're
> aiming for a thick line, which now does not require the use of a
> symbol, but rather:
>
> style
>  width 20
>  color 0 0 255
> end
>
> regards,
> thomas
>
> On Fri, Mar 11, 2011 at 02:24, Anzel, Phil - Fort Collins, CO
> <Phil.Anzel at ftc.usda.gov> wrote:
>> All,
>>
>> I upgraded to MapServer 5.7 (6.0.0-beta1) code for x32/VS2010 (downloaded from http://vbkto.dyndns.org/sdk/) on March 9, 2011.
>>
>> It appears that embedded symbols are not drawn. Below is a simple map file that has a single diagonal line as a feature and two styles; the first should draw a 25-pixel circle, the second a single-pixel line; similar map files worked under 5.6.3. I do not know if this worked under 5.7 circa December 15, 2010.
>>
>> Only the single-pixel line is drawn. I've tried various other symbol definitions; none appear in the output.
>>
>> I'm using the "drawmap.exe" utility to draw the PNG output file under Microsoft Windows XP Professional 2002 SP 3. No errors are reported.
>>
>> Can you help?
>>
>> Thanks,
>>
>> - Phil Anzel
>>  Web Soil Survey development team
>>  Vistronix Inc. for USDA/NRCS/ITC
>>
>> ..... start of map file .....
>>
>> MAP
>>  OUTPUTFORMAT
>>    NAME 'pnga'
>>    MIMETYPE 'image/pnga'
>>    DRIVER 'AGG/PNG'
>>    EXTENSION 'png'
>>    IMAGEMODE 'RGBA'
>>    TRANSPARENT TRUE
>>    FORMATOPTION 'INTERLACE=OFF'
>>  END
>>  STATUS ON
>>  SIZE 954 589
>>  EXTENT -11760744.430293 5057510.78178777 -11752931.9172644 5062334.23060729
>>  RESOLUTION 70
>>  UNITS METERS
>>  IMAGECOLOR 255 255 255
>>  PROJECTION 'proj=merc' 'a=6378137' 'b=6378137' 'lat_ts=0.0' 'lon_0=0.0' 'x_0=0.0' 'y_0=0' 'k=1.0' 'units=m' 'nadgrids=@null' 'north' 'no_defs' END
>>
>>  symbol
>>    name 'circle' filled true type ellipse points 0 0 1 1 end
>>  end
>>
>>  LAYER
>>    NAME  'single line'
>>    STATUS ON
>>    TYPE LINE
>>    feature points -11760750 5057520 -11752920 5062330 end end
>>    CLASS
>>      style
>>        symbol 'circle'
>>        size 20
>>        color 255 255 0
>>        outlinecolor 255 0 0
>>      end
>>      style
>>        width 1
>>        color 0 0 255
>>      end
>>    end
>>  END # end of layer 'single line'
>> END  # end of MAP
>>
>> ..... end of map file .....
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>