Abstract: The electronic ditallevdwas pushedout in 1990；its appearinghas reformedl method to traditional me．Its ne principlesition,arlsfornl the opticalimaging from barcode of leveling stafin to did decmnieimage and then processes them．Its advantage is able to avoid the estion error of surveyor's eye and to heighten greatly precision and work eficiency．

Key words: electronic dita1 level(EDL), bar code leveling staf, function, principle

摘要： 电子数字式水准仪于9o年代初推出以来，对传统的水准测量起到了革新作用。电子数字式水准仪利用了条 形码水准标尺得到的光学图像转换成数字电子图像并且进行数字处理，从而减少了对作业人员目估分划的误差， 大大提高了测量精度和工作效率

关键词: 电子数字式水准仪, 条形码水准标尺, 功能, 原理