本文描述了美国宇航局俄亥俄州刘易斯研究中心的地下测绘系统。该中心占地350英亩，地下公用设施系统经常进行改造。许多系统图纸已经修改了30多次，使其难以阅读。在阿克伦大学（俄亥俄）开发的绘图系统被用来将图纸转换成计算机绘图系统。本文详细介绍了系统的转换过程，并描述了最终的结果。除基本地图外，还将提供定制颜色图:任何比例、任何区域、各种颜色，以及85个指定图层的任何组合。未来的增强功能包括增加图层和编程，使地图可以在不使用铅笔或手动数字化测量数据的情况下进行更新。加上- on程序已用于分析水系统，并将用于分析三个下水道系统。水、下水道和路面的管理方案也在考虑之中。

This paper describes the underground mapping system for NASA's Lewis Research Center in Ohio. The center covers 350 acres, and modifications to the underground utility system are frequent. Many of the system drawings have been revised more than 30 times, rendering them difficult to read. A mapping system developed at the University of Akron (Ohio) was used to convert the drawings to a computerized mapping system. The paper details how the system was converted and describes the final results. In addition to basic maps, custom color plots will be available: at any scale, of any area, in a range of colors, and of any combination of the 85 designated layers. Future enhancements include additional layers, and programming to allow the maps to be updated without use of a pencil or by manually digitizing survey data. Add-on programs have been used for analysis on the water system, and will be used for analysis of three sewer systems. Management programs for water, sewer, and pavement, are also being considered.