In recent years, it has become important to understand people flow in various fields. However, most of the methods to understand people flow are limited to urban areas, and there are few studies that have been conducted on a nationwide scale using pseudo people flow data. In addition, by using vector tiling technology in data visualization and changing the granularity of the data according to the zoom level, the amount of data can be saved and the processing speed can be improved. Therefore, in this study, we created pseudo people flow data covering about 120 million people on a nationwide scale using the vector tiling technology, and visualized the data to understand the actual situation. As a result, the amount of data has been reduced to about 57%, and efficient visualization can be performed with the necessary information displayed according to the zoom level, including rural areas.

Most of researches of road network generation by vehicle trajectory data are focused on generating a complex network which can be used in car navigation. However, there is no research on generating a network with major roads and intersections for analysis. This paper introduces a simple way to extract major intersections by using vehicle trajectory data only. We checked the distribution of trajectory data around intersections and applied the spatial scan statistics with two kinds of distributions, the angle distribution of azimuths, and the spatial distribution of data with large turning angles. We extracted areas with large variance on angle distribution, as well as areas where data with large turning angles concentrate, as intersection areas, and then discussed the validity of extracted intersections. As a result, a future possibility of generating a network for analysis by using large scale vehicle trajectory data is shown in this paper.

The appearance of Sunset and Twilight in your daily life differ depending on the area and urban structure. For example, in high latitude areas, the solar altitude is low, and in a city of grid pattern, there are rules in the direction in which the Twilight sky can be seen. Therefore, the paper assesses the importance that the duration of Twilight can be speculated if we know geographical conditions such as latitude and season, and urban conditions such as the direction of the road. Therefore, the main result of this work is that we built a theoretical model to speculate the duration of Twilight and apply the theoretical model to the Western Tenpoku Region located on the northernmost part of Hokkaido. The result showed that the duration of Twilight is longer and the Twilight azimuth is wider in the high latitude areas. The other result of this work showed that the Western Tenpoku Region, which has grid pattern roads and various angles, is a rare region where you can enjoy the scenery of Twilight all year round.

Hikawa Shrine is a network of shrines that are widely distributed across the Kanto Plain. It is believed that the gods of the shrine are related to water and help control severe floods. This study aims to clarify the relationship between topography and Hikawa Shrine distributed in Tokyo Metropolis. It analyzed the relative heights and topographical characteristics of places around the shrines, and clarified that Hikawa Shrine is more concentrated in the relative heights of 1-13 m in comparison with other shrines in Tokyo Metropolis. The analysis of landform classification around Hikawa Shrine revealed that most of them are located on plateaus/terraces, artificial topography, and micro-highlands in the lowland. Additionally, it clarified that Hikawa Shrine is located nearer to rivers than other shrines are.