Export wind field estimation

[ABraun]

this is what I did:

1. open the xml in MS Excel
2. save it as a CSV and import the CSV in QGIS (skip first 3 lines)
3. field calculator: atan2( "dx:Double" , "dy:Double" ) * (180/pi()) + 90
4. use a “simple marker” with the rotation attribute as calcualted abov