Warn on loading BT with missing .prj file
Warn on loading BT with missing .prj file

seanisom/vtp,nakijun/vtp,markraz/vtp,seanisom/vtp,seanisom/vtp,markraz/vtp,markraz/vtp,seanisom/vtp,markraz/vtp,nakijun/vtp,nakijun/vtp,seanisom/vtp,nakijun/vtp,markraz/vtp,nakijun/vtp