TY - JOUR A1 - Zhou, Y. A1 - Hu, Q. A1 - Zhang, J. A1 - Zhao, P. A1 - Yu, F. A1 - Ai, M. T1 - AN GROUND AND UNDER-GROUND URBAN ROADS SURVEYING APPROACH USING INTEGRATED 3D LIDAR AND 3D GPR TECHNOLOGY JO - ISPRS Ann. Photogramm. Remote Sens. Spatial Inf. Sci. J1 - ISPRS-Annals VL - X-3/W2-2022 SP - 101 EP - 107 Y1 - 2022/10/27 PB - Copernicus Publications SN - 2194-9050 UR - https://isprs-annals.copernicus.org/articles/X-3-W2-2022/101/2022/ L1 - https://isprs-annals.copernicus.org/articles/X-3-W2-2022/101/2022/isprs-annals-X-3-W2-2022-101-2022.pdf DO - 10.5194/isprs-annals-X-3-W2-2022-101-2022 ER -