Other relevant info
Explanation of aviation colour codes
http://en.wikipedia.org/wiki/Volcano_warning_schemes_of_the_United_States
Hysplit Ash Modelling
http://www.arl.noaa.gov/HYSPLIT_ashhistory.php
Eurocontrol portal
https://www.cfmu.eurocontrol.int/PUBPORTAL/gateway/spec/index.html
Screenscraping service
http://www.getmozenda.com/
Google on drawing polylines
http://code.google.com/apis/maps/documentation/overlays.html#Drawing_Polylines
Noaa volcanic ash modelling
http://www.arl.noaa.gov/VolcAsh.php
How to make a timelapse from webcam images
http://www.salzgeber.at/articles/timelapse/