The road buried objects are managed using paper maps and GIS by road administrator. Paper maps are still used for road possession permit application and continuation. It is necessary for road administrator and utility company to cut cost down by using GIS. The objective of this study is to investigate importance of spatial data infrastructure (SDI) shared between the public and private sectors using examples of road possession permit and continuation. The road possession permit and application system was developed using shared SDI. The efficiency method of possession continuation application was proposed, and evaluated with Kadoma city and Osaka Gas Co., Ltd.
Since 1988, Japan Digital Road Map Association (DRM) creates, has created, updated and provided the Digital Road Map Database (DRM-DB) based on public-private collaboration. The DRM Database is the national standard digital road map database supporting ITS infrastructures in Japan. The DRM-DB enables automobile navigation systems to display road maps on their screens and search for the suitable traveling route.