TY - Data T1 - Irrigation ditch map in Zhangye city A1 - Mingguo Ma A2 - JF - A Big Earth Data Platform for Three Poles JA - A Big Earth Data Platform for Three Poles Y1 - 2013/07/20 UR - https://dx.doi.org/10.11888/Socioeco.tpdc.270605 PB - A Big Earth Data Platform for Three Poles M3 - 10.11888/Socioeco.tpdc.270605 DO - 10.11888/Socioeco.tpdc.270605 ER -