OpenspaceGlobal: the first urban open space product of global 169 megacities

Urban open space (UOS) plays an important role, especially in areas characterized by intense social and economic activity. However, UOS mapping products for major cities around the world are lacking. To fill this gap, we used a deep learning–based method based on a tiny-manual annotation strategy to map UOS and produced a 1.19 m resolution UOS map of 2021 in urban areas of global 169 megacities with populations of over 3,000,000 people (namely the OpenspaceGlobal product). It contains five urban open space categories, namely "park and green spaces," "outdoor sports spaces," "transportation spaces," "water body spaces", and "background". The OpenspaceGlobal product can promote a better understanding of human-made space surfaces in major cities worldwide and facilitate functions such as urban livability estimation, urban planning, and sustainable development. The OpenspaceGlobal product is free to use for non-commercial forms including scientific research and science promotion under proper citation.

城市开放空间（Urban Open Space，以下简称UOS）具有重要价值，尤其在社会与经济活动高度密集的区域。然而，当前全球范围内针对特大城市的城市开放空间制图产品仍较为匮乏。为填补这一研究空白，本研究采用基于微量人工标注策略的深度学习方法开展城市开放空间制图，制作了全球169个人口超300万特大城市2021年的1.19米分辨率城市开放空间地图（以下简称OpenspaceGlobal数据集）。该数据集包含五类城市开放空间类别，分别为“公园与绿地”、“户外运动空间”、“交通空间”、“水体空间”以及“背景区域”。OpenspaceGlobal数据集有助于增进对全球特大城市人工地表空间的认知，并可支撑城市宜居性评估、城市规划与可持续发展等相关工作。在规范引用的前提下，OpenspaceGlobal数据集可免费用于科学研究、科学普及等非商业用途。

搜集汇总

背景与挑战

背景概述

OpenspaceGlobal是全球169个大城市的1.19米分辨率城市开放空间地图产品，包含公园绿地、户外运动空间等五类空间数据，适用于非商业用途如科研和城市规划。