Scientific Reports 7:110; doi:10.1038/s41598-017-00158-z; Article published online 08 March 2017

In the original version of this Article, Yuxiang Dong was incorrectly listed as being affiliated with ‘Guangdong Provincial Key Laboratory of Urbanization and Geo-simulation, Centre of Land Research, School of Geography and Planning, Sun Yat-sen University, Guangzhou, 510062, PR China’. The correct affiliation is listed below:

‘Guangdong Provincial Key Laboratory of Urbanization and Geo-simulation, Centre of Land Research, School of Geography and Planning, Sun Yat-sen University, Guangzhou, 510275, PR China’.