本文以某一示范区的土地利用动态监测系统的研究为例，详细阐述了其变化图斑获取子系统实现的关键技术和过程。
The paper regards the system of the dynamic monitoring for land use as an example, and expounds detailedly the key-techniques and the process obtaining the change polygon.
土地利用的变化既是城市化结果的具体体现，又是城市化引起的社会、经济、环境等诸多方面动态变化过程的反映。
Land use change not only results from urbanization, but also is the reflection of dynamic changing process of many aspects such as society, economy, environment and so on.
吐鲁番市气候的特殊性及其经济地理位置的重要性，使得吐鲁番市土地利用动态演变过程具有特殊的规律。
With the special climate and geographical location of its economic importance, Turpan city has its special law in land use dynamic evolution.
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