Model and implementation of geographic data transaction certificate and copyright protection based on blockchain and digital watermarking
ZHU Changqing, XU Dingjie, REN Na, CUI Hanchuan, ZHAO Yazhou
Acta Geodaetica et Cartographica Sinica . 2021, (12): 1694 -1704 .  DOI: 10.11947/j.AGCS.2021.20200559