SMARTPHONE LEVEL INDOOR/OUTDOOR UBIQUITOUS PEDESTRIAN POSITIONING 3DMA GNSS/VINS INTEGRATION USING FGO - Ho, H.-Y.; Ng, H.-F.; Leung, Y.-T.; Wen, W.; Hsu, L.-T.; Luo, Y. (Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci., 2023)