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Nie, Wenfeng https://orcid.org/0000-0002-5505-2903

Xu, Tianhe https://orcid.org/0000-0001-5818-6264

Rovira-Garcia, Adria https://orcid.org/0000-0002-7320-5029

Juan Zornoza, José Miguel https://orcid.org/0000-0003-1126-2367

Sanz Subirana, Jaume https://orcid.org/0000-0001-8880-7084

González-Casado, Guillermo https://orcid.org/0000-0001-6765-2407

Chen, Wu https://orcid.org/0000-0002-1787-5191

Xu, Guochang https://orcid.org/0000-0002-1509-4666

Funding for this research was provided by:

National Key Research and Development Program of China (2016YFB0501902)

National Natural Science Foundation of China (41574025)

National Natural Science Foundation of China (CN) (41574013, 41731069)

Spanish Ministry of Science and Innovation project (CGL2015-66410-P)

The Hong Kong RGC Joint Research Scheme (E-PolyU501/16)

State Key Laboratory of Geo-Information Engineering (SKLGIE2015-M-2-2)

Text and Data Mining valid from 2018-06-26