Sidewalk Grates

Grate: A single point capture for the feature at the visual center point. Grates are structures of parallel or crossed bars, used to cover steam vents or other ventilation features for buildings, and also include grates for DC Metro ventilation. They typically occur on sidewalks. Storm water inlets are not included.格栅（Grate）：针对视觉中心点处的特征进行单点捕获的目标类别。格栅为带有平行或交叉杆状结构的设施，主要用于遮盖建筑物的蒸汽排气口或其他通风设施，同时涵盖华盛顿地铁（DC Metro）通风系统配套使用的格栅。该类设施通常分布于人行道区域，不包含雨水进水口。