http://reply.papertrans.cn/1/18/1794/1794-31.png
Submitted on: 26 January 2017.
Revised on: 06 April 2017.
Accepted on: 17 May 2017.
___________________Annals of GIS---TAYLOR & FRANCIS LTD
http://reply.papertrans.cn/1/18/1794/1794-33.png
http://reply.papertrans.cn/1/18/1794/1794-34.png
Submitted on: 14 June 2016.
Revised on: 26 July 2016.
Accepted on: 23 August 2016.
___________________Annals of GIS---TAYLOR & FRANCIS LTD
Submitted on: 20 October 2018.
Revised on: 22 January 2019.
Accepted on: 24 February 2019.
___________________Annals of GIS---TAYLOR & FRANCIS LTD