【摘要】 对定向运动中线状地物统称半依比例尺地物这一基础理论进行阐述,指出其描述不妥之处,并做出结论。更多还原

【Abstract】 The thesis sets forth the basic theory on line feature which is called by a joint name length-scale feature in the orienteering movement,pointing out some misgivings,and draws a conclusion.更多还原