[Users] Get Position from Vectorlayer

[Kai Volland]

Hi,

i get the error map.getLonLatFromViewPortPx is null when using it with a 
vectorlayer. Isn't it possible to use it it with a vectorlayer? And if 
it's not possible how to get the position of an vector item?

(The idea is to zoom in when clicking on clustered vectoritems.)

Kind regards

Kai