Obstructed Areas

Obscured Areas are areas in the compilation imagery that due to shadows, dense vegetation, heavy tree cover, building lean, etc., that completely block out all image detail and nothing can be seen or interpolated to meet accuracy or project scope. Since these areas are obscured by shadows, the level of confidence in the placement of the bounding lines is reduced.遮挡区域（Obscured Areas）指合成影像中因阴影、茂密植被、浓密树冠、建筑倾斜等因素，导致所有图像细节完全被遮蔽，既无法直接辨识内容，也无法通过插值操作满足精度要求或适配项目范围的区域。由于此类区域被阴影遮挡，对其边界标注线的定位置信度会有所降低。