中文摘要：

利用GPS／PDA技术进行土地利用更新调查可以提高调查效率和精度，本研究采用该技术结合地形图与遥感图像，对江苏省句容水库小流域土地利用数据库进行更新调查。研究结果表明，该技术快捷便利，数据结果可靠，出错率低，完全适用于1：1万比例尺的土地利用现状更新调查，具有巨大的推广价值与广阔的应用前景。

英文摘要：

Using GPS/PDA tcchniquc could improve the precision and efficiency of land use renewal investigation. A case study was presented in a small catchment of JuRong reservoir in Jiangsu province combined with topographic map and remote sensing image. The results showed that the technique is handy, fast and reliable. It is able to satisfy the precision requirement of land use renewal investigation at the scale of 1：10000, and thus of great value to popularize.