Phudinan Singkhamfu และ Akkapop Prasompon. (2019) Accuracy Enhancement of Consumer-Grade Global Positioning System (GPS) for Photogrammetric and City Mapping Determinations. <i>International Journal of Building, Urban, Interior and Landscape Technology</i>, <i>14</i>, 81-92.Phudinan Singkhamfu และ Akkapop Prasompon. "Accuracy Enhancement of Consumer-Grade Global Positioning System (GPS) for Photogrammetric and City Mapping Determinations". International Journal of Building, Urban, Interior and Landscape Technology 14 (2019):81-92.Phudinan Singkhamfu และ Akkapop Prasompon. Accuracy Enhancement of Consumer-Grade Global Positioning System (GPS) for Photogrammetric and City Mapping Determinations. Thammasat Printing House:ม.ป.ท. 2019.