symbology - How to create a style file for QGIS from a plain text file?

Using QGIS 1.7.

I have a plain text file, which lists 115 rgb values against a map code for a geological map. Viz.:

$ head gsv1Msymbology.txt
MAPCODE RED GREEN   BLUE
Oc  143 255 255
WAT 255 255 255
Qa  244 250 202
Qdl 195 239 218
Na  248 255 238
Qd2 227 255 190
Qxw 248 255 238

Qns 255 148 83
Qn  255 202 190
.... 

Is there some tool to generate a QGIS style file from this? How much of the full style declaration is required? I have very little scripting-fu.

Here is a section from a style file with random colour-fill choices:

  Daw
  Daw
  

  hard:circle
  2
  pixels
  
  
  
  
  SolidLine
  0.26
  

  SolidPattern
  

If I can get away with just

  Daw
  Daw
  

and somehow merge the remainder, then I can probably do it in a spreadsheet.

Ben.

Answer

One solution would be (I've no idea how you could achieve this with GUI tools):

cat gsv1Msymbology.txt | grep -v MAPPCODE | while read line
do
echo $line | awk -F" " '{print "\n\t" $1 "\n\t " $1 "\n\t\n"}'
done

This yields:

diciu$ cat gsv1Msymbology.txt | grep -v MAPPCODE | while read line
> do
> echo $line | awk -F" " '{print "\n\t" $1 "\n\t " $1 "\n\t\n"}'
> done

    Oc
     Oc
    



    WAT
     WAT
    

The logic behind it is:

• strip out the header line (grep -v)


• for all the other lines, read them one at a time



• run awk on each line with field separator set to " " -> this means your first field (value) is $1, the second is the red component ($2), and so on.


• print the XML fragment replacing placeholders with actual values

The rest of the style section goes as plain text in the awk line, just like the rest (not very readable, I know):

diciu$ cat gsv1Msymbology.txt | grep -v MAPPCODE | while read line; do echo $line | awk -F" " '{print "\n\t" $1 "\n\t " $1 "\n\t\n\thard:circle\n\t2\n\tpixels\n\t\n\t\n\t\n\t\n\t\n\tSolidLine\n\t0.26\n\t\n\tSolidPattern\n\t\n"}'; done | head -n 18

    Oc
     Oc
    
    hard:circle

    2
    pixels
    
    
    
    
    
    SolidLine
    0.26
    

    SolidPattern