Ho, H.-Y.; Ng, H.-F.; Wen, W. .; Gu, Y.; Hsu, L.-T. Enhancing Smartphone-based Pedestrian Positioning: Using Factor Graph Optimization With Indoor Outdoor Detection for 3DMA GNSS Visual-Inertial State Estimation. JDSIS 2024. https://doi.org/10.47852/bonviewJDSIS42022961.