TY - JOUR A1 - Gao, X. A1 - Zhang, J. A1 - Zou, R. A1 - Li, J. A1 - Cao, Z. T1 - MULTI-USER COLLABORATIVE VIRTUAL EMERGENCY DRILL SYSTEM FOR URBAN ROAD EMERGENCIES JO - ISPRS Ann. Photogramm. Remote Sens. Spatial Inf. Sci. J1 - ISPRS-Annals VL - X-3/W2-2022 SP - 9 EP - 15 Y1 - 2022/10/27 PB - Copernicus Publications SN - 2194-9050 UR - https://isprs-annals.copernicus.org/articles/X-3-W2-2022/9/2022/ L1 - https://isprs-annals.copernicus.org/articles/X-3-W2-2022/9/2022/isprs-annals-X-3-W2-2022-9-2022.pdf DO - 10.5194/isprs-annals-X-3-W2-2022-9-2022 ER -