随着发展超过县和市，地理信息系统（GIS）用于制图的应用也在增长。现场人员携带覆盖其指定区域的硬拷贝地图和/或CD的空间有限。无线应用也有其局限性。本文介绍了使用笔记本电脑维护切斯特菲尔德县公用事业系统的GIS信息。它讨论了使用、系统维护和管理的角度。在笔记本电脑上使用便携式实用程序维护应用程序，可以轻松地从一个屏幕切换到下一个屏幕，以查看所有映射需求。它用于现场，用于台式机和服务柜台。这是一个电子工具，需要一台好的笔记本电脑，很少的物理空间和最新的更新。

As development overtakes counties and cities, the utilization of geographic information systems (GIS) for mapping has grown. Field personnel have limited space for carrying hard copy maps and/or CD's that cover their assigned territory. Wireless applications also have their limitations. This paper addresses the use of laptops that maintain Chesterfield County's GIS information for their utility system. It discusses usage, systems maintenance and management's perspective. The use of a Portable Utility Maintenance Application on laptops allows easy transition from one screen to the next to view all mapping needs. It is used in the field, for desktops and service counters. It is an electronic tool that requires a good laptop, little physical space and up to the minute updates.