About the Authors

Tao Cheng

tao.cheng@ucl.ac.uk

Affiliation SpaceTimeLab, Department of Civil, Environmental and Geomatic Engineering, University College London, Gower Street, WC1E 6BT London, the United Kingdom

Monsuru Adepeju

Affiliation SpaceTimeLab, Department of Civil, Environmental and Geomatic Engineering, University College London, Gower Street, WC1E 6BT London, the United Kingdom

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: TC MA. Performed the experiments: MA TC. Analyzed the data: MA TC. Contributed reagents/materials/analysis tools: TC MA. Wrote the paper: TC MA.