Bulletin of the GSI (Vol.61)
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Taro UBUKAWA, Akifumi ANDO, Toshinobu SAITO,Maya UEDA, Akiko YAMADA and Masaki SUGA Abstract The Geospatial Information Authority of Japan is conducting a Global Mapping Project, and is serving as the Secretariat of the International Steering Committee for Global Mapping. After the release of Version 1 of the Global Map in 2008, we have developed Version 2 of the Global Map, and more and more countries and regions have released their Global Map data sets. In addition, Global Land Cover and Vegetation (Percent Tree Cover) layers also became available in finer resolution as compared with the previous version. ISCGM has started working closely with the United Nations Committee of Experts on Global Geospatial Information Management trying to reflect international needs for developing reliable geospatial information.
Contents1. Introduction 2. Development and Release of Global Map Version 2 2.1 Progress of data development 2.2 Release of Global Map Global Version (Land Cover and Vegetation) 2.3 Accuracy and characteristics of Global Map Global Version 3. GSI’s activities to support data development in developing countries/regions 3.1 Development of the Manuals 3.2 Development of the Global Map Metadata Editor 3.3 Development of the Global Map Data Check Software (GMDC) 4. Use of the Global Map 4.1 Number of Downloads 4.2 Application of Global Map at GSI Maps 5. Global Mapping Activities in harmony with other international initiatives 5.1 Seminar at Rio+20 5.2 Working closely with UNCE/GM4SD 6. Conclusion References Hiromichi TSUJI, Kohei MIYAGAWA, Kazunori YAMAGUCHI, Toshihiro YAHAGI, Kenichi OSHIMA, Hiromi YAMAO and Tomoaki FURUYA Abstract Since 1994, the Geospatial Information Authority of Japan (GSI) has been operating a continuous GPS observation network system, later known as GEONET, for surveying and crustal deformation monitoring. On May 10, 2013, GSI started providing nationwide the observation data from the Quasi-Zenith Satellites System and GLONASS in addition to GPS, opening the multi GNSS era in Japan. This report provides the background and history behind this modernization of GEONET, the effect of the use of multi GNSS confirmed so far, and the plan for the future modernization.
Contents1. Introduction 2. Background 2.1 GEONET as Infrastructure 2.2 Expectations to GNSS 3. GNSS Implementation 3.1 Initial Plan 3.2 Early Renewal after the 2011 off the Pacific coast of Tohoku Earthquake 3.3 Renewed Equipment 3.4 RINEX Data 3.5 Real-time Data 4. Effect of GNSS Implementation 4.1 Precision of Baseline Analysis 4.2 Network-based Multi-GNSS Experiments 4.3 Application to Intelligent Construction 5. Future Plan Acknowledgements References Mamoru KOARAI and Takayuki NAKANO Abstract The 2011 off the Pacific coast of Tohoku Earthquake in Japan caused liquefaction in large parts of the Kanto Region, especially in the Tokyo Bay side area and the lower reaches of the Tone River. Liquefaction was concentrated in areas of land reclamation and former river channels, where it is easy to recognize using time-series geospatial information such as old topographical maps and old aerial photographs. The author conducted a field survey about the disaster situation at liquefaction sites in the middle and downstream areas of the Tone River, and conducted research about geographical conditions of the remarkable area affected by liquefaction damage using time-series geospatial information. The time-series geospatial information that was mainly utilized was old French style maps “Rapid Survey Maps”, old topographical maps, past aerial photos, Land Condition Maps and Landform Classification Maps for Flood Control. It is effective to use land historical information detected by time-series geospatial information for mapping of areas of vulnerability.
Contents1. Introduction 2. Useful geospatial information for detection of land history 2.1 Old topographical maps 2.2 Old aerial photos 2.3 Rapid Survey Maps (Jinsoku-Sokuzu) 2.4 Thematic map (Land Condition Map, Landform Classification Map for Flood Control) 3. Liquefaction damage on Tone River area caused by the 2011 off the Pacific coast of Tohoku Earthquake 3.1 Liquefaction damage in the Hinode area of Itako City, Ibaraki Prefecture 3.2 Liquefaction damage in Kessa area of Inashiki City, Ibaraki Prefecture and Kokuno area of Katori City, Chiba Prefecture 3.3 Liquefaction damage in Kozaki Town, Chiba Prefecture 3.4 Liquefaction damage in Fusa area of Abiko City, Chiba Prefecture 3.5 Liquefaction damage in the Kinu area of Shimotsuma City, Ibaraki Prefecture 3.6 Liquefaction damage in the Yoshino area of Joso City, Ibaraki Prefecture 4. Conclusion References |