[Mapserver-users] OGR + DGN STYLEITEM "AUTO" config

[Schepel, Menno]

Hi list,

Some days ago I posted a question about using the STYLEITEM "AUTO" option
for visualizing a DGN file through the OGR library using Mapserver 4.01 on
IIS. Maybe I did not describe the problem correctly since I did not receive
any comments, so I´ll give it another try.

I can´t figure out what to put in my symbol file in order to make the
STYLEITEM "AUTO" option (available within layers read through the OGR
library) work. I can visualize a DGN in single color using this layer
config:

  LAYER
    STATUS OFF
    GROUP DGN
    CONNECTIONTYPE OGR
    CONNECTION "C:\inetpub\wwwroot\vinya\data\granollersv7.dgn"
    NAME "Granollers"
    TYPE Line
    TOLERANCE 10
    METADATA
      WMS_TITLE "Granollers DGN"
      WMS_SRS "EPSG:23031"
      WMS_GROUP_TITLE "OGR-DGN Test Files"
    END
    PROJECTION
      "init=epsg:23031"
    END
    CLASS
	COLOR 255 0 0
    END
    DUMP TRUE
    TEMPLATE "templates/Granollers.html"
    HEADER "templates/Granollers_header.html"
    FOOTER "templates/Granollers_footer.html"
  END

But I would like to be able to see all the colours and styles that are
encapsulated within this layer. I have used the OGRINFO command from the
openEV_FW library and it generates info about styles and elements that can
be found within the DGN file (in this case a line and a label):

OGRFeature(elements):461
  Type (Integer) = 3
  Level (Integer) = 12
  GraphicGroup (Integer) = 0
  ColorIndex (Integer) = 1
  Weight (Integer) = 0
  Style (Integer) = 0
  EntityNum (Integer) = (null)
  MSLink (Integer) = (null)
  Text (String) = (null)
  Style = PEN(id:"ogr-pen-0",c:#ff0000)
  LINESTRING (440671.760 4604784.860,440668.760 4604784.830)

OGRFeature(elements):1102
  Type (Integer) = 17
  Level (Integer) = 18
  GraphicGroup (Integer) = 0
  ColorIndex (Integer) = 4
  Weight (Integer) = 0
  Style (Integer) = 0
  EntityNum (Integer) = (null)
  MSLink (Integer) = (null)
  Text (String) = P
  Style = LABEL(t:"P",c:#00ffff,s:0.750g)
  POINT (440535.710 4605552.610)

I have found some examples of using MapInfo files in the forum and on the
sites of MapServer and DM solutions, but until now I did not see an example
using DGN. The manual is mentioning that it should be possible, however.
What do I have to put in the symbol file in order that it will recognize the
different styles used within the DGN? 
Is there someone who has some experience with this that they could share?
Thanks,

Menno. 

Menno Schepel, consultor GIS
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