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CONSTRUCTION OF GRAVITY DATABASE OVER JAPANESE ISLANDS

日本列岛重力数据库建设

基本信息

批准号：
16340133
负责人：
SHICHI Ryuichi
金额：
$ 10.5万
依托单位：
CHUBU UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2004
资助国家：
日本
起止时间：
2004 至 2006
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-16340133/
关键词：
Gravity database Southwest Japan whole Japanese islands Nationwide gravity database high precition gravity database Gravity Atlas of Japanese Islands 1 75,000 scale of gravity map 大判図重力異常図統一処理・規格化・高精密化空白解消・稠密化

项目摘要

In the wide area of the geo-sciences, gravity data have very important meanings and play an important role. In the field of geodesy, for example, it is indispensable fundamental physical parameter for precise geoid determination. Therefore, it was impatiently longed to be accomplished nationwide gravity database in Japan. Recently, two large gravity databases have been published successively. One is the gravity database ; Gravity CD-ROM of Japan (GSJGDB) by the Geological Survey of Japan (present : National Institute of Advanced Industrial Science and Technology) published in 2000. The other is the gravity database in Southwest Japan (SWJGDB) that constructed by our gravity research group in Southwest Japan and published in 2001. Main frame of the gravity database in Southwest Japan was constructed by developing the achievement of former five projects (the same category of Grant-in-Aid for Scientific Research: No.01540331 in 1989-1991,No.04640400 in 1992-1994,No.07640552 in 1995-1997,N … More o.11440130 in 1999-2000 and No.13640428 in 2001-2003). By publications of those two large databases, circumstances of the gravity database in Japan have much progressed. By merging GSJGDB into our database, we complied a new one to cover whole Japanese islands (JGDB). As concerned to the data coverage of JGDB, there still remained some parts of blank or sparsely distributed areas especially in the Northeast Japan.Present project was planed and executed with two aims ; (1) to start construction of a developed high precition gravity database to cover whole Japanese islands, (2) to issue results obtained by the gravity database and to make it possible for public use. The results obtained are as follows. (1) During the period concerned, we performed an extensive gravity survey and the blank area in the west of Southwest Tohoku district had completely disappeared by more than twenty thousands of newly supplemented precise gravity data. (2) By utilizing this desirable condition, we publish a gravity atlas "Gravity Atlas of Japanese Islands--Southwest Japan and Central Japan--" from the Univ. Tokyo Press in 2004. Besides this, by dividing areas where the data are desirably distributed, we drew 1/75,000 scale of gravity maps. The area were divided into 7 regions, and 4 kinds of maps (a : station distributions, b : Bouguer anomaly, c : colored Bouguer anomaly, and colored Bouguer anomaly of the wavelength less than 125km) were prepared for each regions. Less

在广大的地球科学领域中，重力资料具有十分重要的意义和作用。例如在大地测量领域，它是精确确定大地水准面不可缺少的基本物理参数。因此，日本迫切希望建立全国性的重力数据库。最近，两个大型重力数据库相继出版。一个是重力数据库;日本地质调查局（现：国立先进工业科学技术研究所）于2000年出版的日本重力光盘（GSJGDB）。另一个是由我们的重力研究小组在日本西南部建立的重力数据库（SWJGDB），并于2001年出版。利用前5个项目（1989- 1991年、1992- 1994年、1995-1997年、N. ...更多信息 1999-2000年的No.11440130和2001-2003年的No.13640428）。通过这两个大型数据库的出版，日本重力数据库的情况有了很大的进步。通过将GSJGDB合并到我们的数据库中，我们编写了一个新的数据库，以覆盖整个日本岛屿（JGDB）。关于JGDB的数据覆盖范围，特别是在日本东北地区，还有一些空白或分布稀疏的地区。本项目的规划和实施有两个目标：（1）开始建设覆盖整个日本岛屿的高精度重力数据库;（2）发布重力数据库的结果，使其能够供公众使用。所得结果如下。(1)在此期间，我们进行了广泛的重力测量，东北地区西南部西部的空白区已经完全消失，新补充了2万多个精密重力数据。(2)利用这一理想条件，我们于2004年由东京大学出版社出版了重力地图集“日本岛屿-西南日本和日本中部-”。此外，通过划分数据分布的区域，绘制了1/75，000比例尺的重力图。将研究区划分为7个区域，并为每个区域制作了4种图（a：台站分布图，B：布格异常图，c：彩色布格异常图和波长小于125 km的彩色布格异常图）。少