The Journal of King Mongkut's University of Technology North Bangkok
วารสารวิชาการพระจอมเกล้าพระนครเหนือ

Puttipong Sudjamnong
Department of Survey Engineering, Faculty of Engineering, Rajamangala University of Technology Krungthep, Bangkok,
Thailand

Narong Poonpotmas
Department of Survey Engineering, Faculty of Engineering, Rajamangala University of Technology Krungthep, Bangkok,
Thailand