Study on estimation of wooden building ratio in urban by using satellite remote sensing data

在日本，大多数房子都是木制的。这就导致地震火灾成为众多灾害中最大的灾害之一。对于城市来说，它的结构每年都在变化，建立和维护基础数据库需要大量的时间和费用，而基础数据库是制定防灾规划等所必需的。这里，木结构建筑率是指每一单元的木结构建筑覆盖率。本研究估算木结构建筑覆盖率的方法如下。对于木结构建筑来说，其热容量相对于其他建筑结构来说是比较小的。结果表明，地表温度的变化规律是不同的。本研究针对这一问题，提出了一种估算城市木结构建筑比例的方法。卫星在上午10点和9点两次进行观测。使用 ...更多信息 利用这两套卫星资料，可以考察随地表温度的变化规律。通过比较两个卫星数据中的热特征和建成区的结构特征，得出木结构建筑的比例。并将估算结果与某地方政府的统计值进行了比较。通过这种比较，发现估计的精度是足够的。当绿色覆盖率较大时，地表温度变化的趋势比实际情况下变小。在研究区域内发现了一些木制品和建筑物之间的错误区分等例子。卫星数据提供的纹理信息比以街道为单位收集的统计值要小。在使用统计值的调查中，它忽略了这一点在小临界段的处理。预计当使用卫星数据时，发现临界段成为可能。少

In Japan, most houses are made of wood. This results seismic fires as one of the biggest disaster among other damages. As for the city, it changes its structure every year, the enormous time and the expense are necessary to build and to maintain the fundamental data base which is necessary to draft a plan of the protection against disasters and so on. The purpose of this study is to develop the technique to estimate built-up area wooden percentage using the remote sensing data. Here, wooden building ratio is a coverage percentage by wooden buildings for every unit.The technique to estimate wooden percentage by this study is as follows. As for the wooden building, thermal capacity is small compared with the other kind of building structure. As the result, the pattern of the change of the surface temperature is different. This study aimed at this face and develop a method to estimate a wooden building ratio in urban. The satellite is doing observation with twice at 10 AM and 9 AM. Using … More these two sets of satellite date, the change pattern with surface temperature can be examined. In comparison between the thermal characteristics which can be seen from the two satellite data and the structural characteristics in the built-up area, the wooden building percentage will be obtained. It compared between the estimated result and the statistical value which made by a local government. By this comparison, the estimated precision was found as enough. When the green coverage percentage was large, the tendency which surface temperature change became smaller than when factual was obtained. Some example to be wooden and to mis-distinguish between the building and so on were seen in the subject area.The satellite data gave information with the texture which is smaller than with statistical value which gathered in the unit of street. In the investigation which used a statistical value, it overlooked up to this in the small critical section in the processing. It is expected that the discovery of the critical section becomes possible when using satellite data. Less