making efficient map layers

[Sean Gillies]

Symbol 0 is a single pixel symbol.  You cannot size it.  You'll need to
use a different symbol for that first style.

cheers,
Sean

On Mar 24, 2005, at 8:06 AM, Jeff Portwine wrote:

> When I use a class definition like this, I only get the 1 pixel line, I
> don't see it overlayed on the wider line.
>
>     CLASS
>       maxscale 99000
>       STYLE
>         SYMBOL 0
>         SIZE 3
>         COLOR 0 255 0
>       END
>       STYLE
>         SYMBOL 0
>         SIZE 1
>         COLOR 255 255 255
>       END
>     END
>
> This class only draws the white line and ignores the green style...
> I'm not
> sure why.
>
> -Jeff
>
>>> - How do you go about changing the width of the different types of
>>> roads?  I assume each class of road is in a different layer and you
>>> somehow manipulate the line width?
>>
>> In your class for the roads do something like this:
>>
>> CLASS
>>   EXPRESSION ...
>>   STYLE  # first draw a 5 pixel wide green line
>>     SYMBOL 0 # built in circle symbol
>>     SIZE 5
>>     COLOR 0 255 0  # green
>>   END
>>   STYLE  # then draw a 3 pixel wide white line on top of the green
>>     SYMBOL 0   # that leaves a 1 pixel border on each side of the
>> white
>>     SIZE 3
>>     COLOR 255 255 255  # white
>>   END
>>   STYLE  # then draw a 1 pixel wide black line down the center
>>     SYMBOL 0
>>     SIZE 1
>>     COLOR 0 0 0  # black
>>   END
>>   ...
>> END
>>
>
>
--
Sean Gillies
sgillies at frii dot com
http://users.frii.com/sgillies