Journal Article Measuring urban volume: geospatial technique and application

Estoque, Ronald C.  ,  Murayama, Yuji  ,  Tadono, Takeo  ,  Thapa, Rajesh Bahadur  ,  Estoque, Ronald C.  ,  村山, 祐司  ,  田殿, 武雄  ,  Thapa, Rajesh Bahadur

11pp.13 - 20 , 2015-12-25 , University of Tsukuba
Geospatial techniques based on remote sensing and geographic information system (GIS) are important in urban studies. However, based on traditional techniques, the analysis of the intensity and spatial pattern of urban land use is, in most cases, based only on the lateral extent of built-up lands (two-dimensional). The increasing availability of geospatial data, such as remote sensing satellite imageries and digital surface models, provides an opportunity for the integration of the third dimension in urban analysis, i.e. height of urban features such as high-rise buildings, into urban studies, and thus enables the estimation of the so-called urban volume. This study introduces a geospatial technique for estimating urban volume, focusing on the use of a digital surface model (DSM) derived from ALOS PRISM data. It also presents a method for deriving a digital terrain model (DTM) from a DSM. The proposed technique was tested in Makati City, Metro Manila, Philippines. Overall, the results show that the proposed technique is capable of taking into consideration the height dimension in urban analysis. The proposed two-step grid-based method for deriving a DTM from a DSM is also implementable and promising. In this method, there is a need to calibrate the size of the mesh for identifying the pixels or points to be used in DTM interpolation. This is because different mesh sizes can produce substantially different DTMs, surface feature height values and urban volume estimates.
Physical characteristics: Original contains color illustrations
形態: カラー図版あり

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