Nishogakusha University
Geological Museum, National Institute of Advanced Industrial Science and Technology / Research Institute for Earth Science Visualization Technology
We propose a new method for the analysis of dialectal distributions. The method named HiRP (Highly Realistic Projection Mapping) was established for recognizing correctly and intuitively topographical and geographical information. The information contains essential reference features for analyzing the formation of dialectal distributions. Shibahara has created several techniques of building up finely detailed 3D object based on DEM (Digital Elevation Model), and precise calibration techniques for projection mapping. The HiRP method is based on these techniques. Then, Shimada discovered the usefulness of this method when it is applied for the analysis of the formation of dialectal distributions, because it has been hard to recognize the relevance between extra-linguistic geographical information and dialectal distributions in a linguistic map without some special training. The HiRP method improves the accuracy of this process drastically by overlaying several pictures by projection mapping, such as topographical map, flow path, traffic network, and dialectal distributions, on the same 3D topographic miniatures. In this paper, we introduce the techniques and specifications of the HiRP, and present operation examples of the system by applying it in a case study analyzing temporal variation of the distribution of the words Nusubitohagi (Hittuki-Mushi) in the Nagano Ina-Suwa region.
方言研究における地形情報としてのDEM（数値標高モデル）導入の試み : 言語地図分析における〈精密立体投影〉手法の可能性
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