Abstract
Abstract. Japan is currently facing serious issues associated with an aging society and negative population growth. Urban structures, remnants of economic prosperity, are now hindrances to sustainable urban development, driving municipalities to seek efficient methods to manage this growth. Japanese municipalities continuously conduct surveys to collect data for urban planning purposes. However, lack of standardization and poor visualization tools prevent coordination and consensus-building among stakeholders during the planning process. The "i-Urban Revitalization" (i-UR) is an information infrastructure promoted by the Japanese government expected to enable municipalities to analyze and visualize their goals related to that process.This paper presents the implementation of i-UR. One approach employed for data standardization is to develop a CityGML Application Domain Extension (ADE) for urban planning that covers detailed attributes of city objects and mechanisms for global representation and analysis necessary for urban planning. The effectiveness of this ADE is being evaluated through data implementation and visualization experiments conducted in three municipalities in Japan. A prototype for the proposed "AR Consensus-formation system" is being developed for further utilization of the ADE. In addition, Ideathon events are being held to develop human resources in municipalities to promote urban revitalization and facilitate i-UR use. The ADE and i-UR tools described in this paper are expected to evolve based on feedback from users and experimental results.
Highlights
Urban planning has been contributing to the formation of healthy urban environments preventing disorganized urban sprawl and encouraging infrastructure development
The Urban Planning Application Domain Extension" (ADE) has been developed as an extension for CityGML 2.0
The importance and usefulness of some of the concepts introduced in the ADE is becoming clear when looking at the major version of CityGML 3.0 to be published in 2020 (Kutzner et al, 2020), where similar concepts will be introduced such as the logical spaces
Summary
Urban planning has been contributing to the formation of healthy urban environments preventing disorganized urban sprawl and encouraging infrastructure development. In Japan, which is facing an aging society and negative population growth, urban areas are at a big turning point. New social issues such as a rapid increase of empty apartments and lands, and nonuniversal design of facilities depend heavily on sustainable development, especially in regional areas. This urban shrinkage is a problem in Japan, but is faced by many cities and regions in Europe and North America (Oswalt, 2005). One of the key features of CityGML is the "Application Domain Extension" (ADE), a built-in mechanism of CityGML used to define application-specific extensions by adding new classes and properties (Biljecki et al, 2018)
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