利用遥感数据和林分立地条件构建的生物量估算模型适用范围有限。
The applicability of the estimate model of the biomass constructed by remote data and stand condition is limited.
利用遥感数据提取水体，是水资源和洪涝灾害监测的重要手段及其理论基础。
Water body extraction is the theoretical foundation of water resource and flood disaster monitoring.
利用遥感数据分析得到的研究区域的土地利用变化数据，总结了研究区域城市建成区扩展的时空特征：在1979-1989年间，四个城市建成区扩展速度均较小；
Remote sensing images are used to monitor the urban built-up area expansion from 1979-2004. The spatial-temporal patterns of these cities are: during 1979-1989, the expansion rates are all low;
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