Estimation of built-up and green volume using geospatial techniques: A case study of Surabaya, Indonesia
Estimation of built-up and green volume using geospatial techniques: A case study of Surabaya, Indonesia
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DOI：
10.1016/j.scs.2017.10.017
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发表时间：
2018-02
影响因子：
11.7
通讯作者：
H. H. Handayani-H.;R. Estoque;Y. Murayama
中科院分区：
文献类型：
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作者：
H. H. Handayani-H.;R. Estoque;Y. Murayama
城市指标对于向土地规划者传达相关信息十分重要。传统上，城市土地利用强度和空间格局的横向分析是使用二维方法。遥感卫星图像和数字地面模型等地球空间数据的提供为城市分析引入了第三个层面，即城市体积。因此，采用城市容积指标，利用包括遥感和地理信息系统在内的地理空间技术，量化印度尼西亚一个大城市的建成容积和绿色容积。泗水被选为案例研究，因为这个城市在这十年中在人口和资本投资方面都有显着增长。我们通过进行热点和冷点分析来检查低和高绿色体积的聚类模式。结果表明，平均建成体积达到173.05 m3/像素，代表的住宅单体的高度小于7米。平均绿色体积为14.74 m3/pixel，其特征是高度为0.6-1 m的植被，主要分布在房屋的后院。绿色体积与建成体积的比率较小（8.52%，或每1 m3建成体积有0.085 m3绿色体积）。Kebun Binatang泗水公园已被归类为绿色量的热点区域（具有高绿色量的高度聚集像素）。被归类为冷点的区域大多具有低绿色量和分散/低聚集模式。建成量和绿色量之间存在巨大的不平衡，后者要低得多，这表明需要更多的绿色空间和更高的绿色量。总体而言，本研究可作为未来发展举措的参考，有助于在城市可持续发展的背景下，通过绿化计划改善城市的生活条件。
Urban indicators are important for communicating relevant information to land planners. Traditionally, the intensity and spatial pattern of urban land use are analyzed laterally using the two-dimensional approach. The availability of geospatial data such as those from remote sensing satellite imageries and digital surface models introduces a third dimension in urban analysis, namely urban volume. Thus, an urban volume indicator is applied to quantify built-up volume and green volume of a big Indonesian city using geospatial techniques, including remote sensing and Geographic Information System (GIS). Surabaya is selected as a case study since the city has grown significantly in terms of both population and capital investment in this decade. We examined the clustering pattern of low and high green volume by performing hot and cold spot analysis. The results indicate that the average built-up volume reaches 173.05 m3/pixel, represented by a residential single house of less than 7 m in height. The average green volume is 14.74 m3/pixel, characterized by vegetation of 0.6–1 m in height, mostly found in the backyards of houses. The ratio of green volume to built-up volume is small (8.52%, or 0.085 m3green volume per 1 m3built-up volume). The Kebun Binatang Surabaya Park has been classified as a hot spot area for green volume (highly clustered pixels with high green volume). The areas classified as cold spots are mostly with low green volume and a scattered/low-clustering pattern. There is a huge imbalance between built-up volume and green volume, the latter being much lower, indicating that there is a need for more green spaces and higher green volume. Overall, this study can be used as a reference for future development initiatives that could help improve living conditions in the city through greening programs in the context of sustainable urban development.