So the method of change vector analysis is effective for monitoring winter wheat freeze injury and growth recovery. Also it supply a new way to monitoring the other crop disaster.
因此，变化向量分析法能有效地监测冬小麦冻害灾情与灾后长势恢复情况，同时对其他作物灾害监测提供了途径。
Spatial information analysis: to change from vector format to grid format, buffering section analysis, spatial data overlap analysis, net analysis, etc.
空间信息分析：包括矢量转栅格、缓冲区分析、空间数据的复合分析、网络分析等。
Aiming at shortcomings of the traditional damage assessment model based on pixel-level change detection, this dissertation proposes a new model based on change target features vector analysis.
针对传统的基于像素级变化检测的打击效果评估系统的不足，提出了基于变化目标特征向量分析的打击效果评估系统。
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