[OSM-talk] Area Support /Osmarender

Chris Morley c.morley at gaseq.co.uk
Sat Sep 16 17:19:17 BST 2006


Thomas Walraet wrote:
> Chris Morley a écrit :
>> When drawing areas with the way method you have to watch that all the 
>> segment directions are correctly aligned. This is annoying (direction 
>> has nothing to do with area)
> 
> Direction could have a lot to do with area.
> 
> For example, we can agree on always put the water on the right of a 
> coast line :

> If water is always on the right side of the "way" that represent the 
> water/land demarcation, a renderer could draw the coast-line properly 
> even if only BCD points are on the rendered dataset.
> 
You are right, it was an ill-advised statement. Indeed I had open a
diagram http://www.w3.org/TR/SVG11/painting.html#FillProperties showing
how SVG rendering of areas can depend on the the path direction. But
what matters is the *path* direction and not the individual *segment*
directions. An ordered node-list inherently has a path direction to use
if necessary and I still think it is a cleaner area representation.

Chris





More information about the talk mailing list