added merging of point data preserving area
added merging of point data preserving area

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