[OSM-dev] Ways on the new renderer... maybe usable after all!

[nick at hogweed.org]

Hello Steve (and all on dev),

Just occurred to me tonight that when I discounted rendering ways with  the 
new renderer due to speed issues with the SQL, I was using my original PHP 
code. I realised I hadn't tried it in Ruby... up until tonight.

So I've tweaked renderer.rb to fetch ways and apply way tags to the 
constituent segments. While there is a slight slowdown, it's not too bad. For 
instance, the renderer will render the way-rich tile with bbox 
-0.75,51.02,-0.7,51.07 in 2.6 seconds if ways aren't fetched from the 
database, against 3.7 if ways are fetched and rendered. Other bboxes give 
similar time ratios, typically 3:4 no ways:ways.

Even though there's a slight speed hit, I'm wondering whether we should use my 
latest version (with ways enabled) as practically everyone is creating and 
tagging ways rather than segments now so the rendered map will be very much 
more full-featured with roads and other ways rendered correctly.

Steve - the new version of the script is 
at /var/www/nick/ruby/renderer.rb.WAYS when you have a chance to test :-)

Have also implemented Tom's IE fix in index.rhtml.

Nick