平板仪测图 meaning in Chinese

topographic mapping with plane tab

As one of the leading teams of surveying and mapping in china , our institute accomplished the job of surveying and mapping the whole hainan island in 1950s and 1960s to meet the needs of land uses in rubber plantation and the land designing within or among different farms at that time
作为土地规划设计先行的测绘队伍，在上世纪五十、六十年代，为满足垦区找地种橡胶，规划建农场，进行场间土地规划和场内土地规划的需要，先后完成了大面积的平板仪测图并参与完成全岛第一代1 ： 1万航测地形图的外业测绘。