512,256 obstacle csv lat,long 0.2,-0.35 0.2,0.35 grouped csv lat,long,name1,ref1,name2,ref2,margin 0,-0.35,One,1,Two,2,0 0,0.35,One,1,Two,2,30 frame csv lat,long,nr -0.5,-1,0 -0.5,1,1 0.5,-1,2 0.5,1,3 center csv lat,long 0,-0.35 0,0.35