TY - JOUR A1 - Mortari, F. A1 - Zlatanova, S. A1 - Liu, L. A1 - Clementini, E. T1 - "Improved Geometric Network Model" (IGNM): a novel approach for deriving Connectivity Graphs for Indoor Navigation JO - ISPRS Ann. Photogramm. Remote Sens. Spatial Inf. Sci. J1 - ISPRS-Annals VL - II-4 SP - 45 EP - 51 Y1 - 2014/04/23 PB - Copernicus Publications SN - 2194-9050 UR - https://isprs-annals.copernicus.org/articles/II-4/45/2014/ L1 - https://isprs-annals.copernicus.org/articles/II-4/45/2014/isprsannals-II-4-45-2014.pdf DO - 10.5194/isprsannals-II-4-45-2014 ER -