天气预报15天查询> 其他> 大地水准面有几个

大地水准面有几个

更新时间: 2020-10-03 00:00:00     

1个

大地水准面,指与平均海水面重合并延伸到大陆内部的水准面,是正高的基准面,在测量工作中,均以大地水准面为依据,因地球表面起伏不平和地球内部质量分布不匀,故大地水准面是一个略有起伏的不规则曲面,该面包围的形体近似于一个旋转椭球,称为“大地体”,常用来表示地球的物理形状。

关键词: 大地 水准

如有意见、反馈、侵权或投诉等情况,请联系:

电话:
邮箱:

我们将会在48小时内给与处理!

版权所有 Copyright ? 2009-2020 tianqiyubao3.com

页面:/news/view-1971923/ | 耗时:0.3572 s | 内存:1.89 MB | 查询:4 | 缓存读取:4 写入:0 | 加载文件:23
select * from tbl_Articles WHERE ArticleID=1971923 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=1971923 LIMIT 0,1
select * from tbl_Articles_sphinx where id=1971923 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(1105785,1092454,1127463,1081061,1058093,1084587,1080072,1088802,1093240,1064931,1929569,1128407,1068088,1128981,1097621,1121734,1078402,1045123,1106902,1126644,1069889,1062450,1002750,1729391,1078995,1071197,1044899,1066066,108953,1130918) ORDER BY field (ArticleID,1105785,1092454,1127463,1081061,1058093,1084587,1080072,1088802,1093240,1064931,1929569,1128407,1068088,1128981,1097621,1121734,1078402,1045123,1106902,1126644,1069889,1062450,1002750,1729391,1078995,1071197,1044899,1066066,108953,1130918)