作者根据地籍测量工作自动化的需要，开发了一个机助测绘系统，此系统可以接收ＰＣ—１５００袖珍机、电子手簿和其他小型计算机的数据。在系统研制开发过程中结合辽阳市地籍测量工程，使用Ｒ４８电子手簿对地籍信息进行了现场采集，在此，对Ｒ４８做简要介绍并重点叙述其外业测量记录格式。 Based on the needs of automated cadastral surveying work, the author developed an aircraft-based surveying and mapping system that can receive data from PC-1500 pocket machines, electronic books and other small computers. In the course of system development and development, combined with the cadastral surveying project in Liaoyang City, cadastral information was collected on-site using the R48 electronic handbook. Here, a brief introduction of R48 and a description of the recording format of its field measurement were described.