长三角重点城市建筑物屋顶分布数据集(2020年)

该数据为长三角重点城市建筑物屋顶分布数据集，时间为2020年。数据集主要包含了长三角地区建筑物屋顶矢量数据，包括两个版本：建筑物屋顶原始数据集Version 1(建筑物屋顶矢量原始数据集版本由深度学习语义分割模型从原始影像中识别建筑物屋顶栅格并转化为矢量数据，数据占用空间较大)和简化版Simplified Version 1(建筑物屋顶简化数据集由原始数据集对每个屋顶矢量要素进行简化处理,对锯齿状矢量边界进行简化，使屋顶矢量形态更接近实际屋顶形状，并减小数据存储空间，提高数据使用的便捷性)。

This is a building roof distribution dataset covering key cities in the Yangtze River Delta, with a temporal scope of 2020. The dataset primarily provides vector data of building roofs across the Yangtze River Delta region, including two versions: Vector Building Roof Original Dataset Version 1 (this original vector building roof dataset is generated by identifying building roof raster data from raw imagery via deep learning semantic segmentation models and converting the raster data into vector format, which occupies a relatively large storage footprint) and Simplified Version 1 (this simplified building roof dataset is processed by simplifying each roof vector element from the original dataset, including smoothing jagged vector boundaries, to make the roof vector shape closer to the actual roof geometry, reduce data storage footprint, and improve the convenience of data utilization).