近年来,GPS在我国林业行业得到了广泛地应用。很多单位陆续引进了GPS,并取得了良好的使用效果。GPS手持机具有操作简单、携带方便、坚固耐用、购买和维护成本较低等优点,能够快速、高效、准确地提供点、线、面要素的精密坐标,完成森林资源调查与管理中各种境界线的勘测与放样落 In recent years, GPS has been widely used in China’s forestry industry. Many units have introduced GPS, and achieved good results. GPS handhelds have the advantages of simple operation, convenient carrying, ruggedness, low purchase and maintenance costs, etc., which can quickly, efficiently and accurately provide the precise coordinates of point, line and surface elements and complete various realms of forest resource investigation and management Line survey and loft drop