原帖由 <i>反贪先锋</i> 于 2008-12-26 00:20 发表 <a href="http://www.fengshui-168.com/redirect.php?goto=findpost&pid=258690&ptid=19103" target="_blank"><img src="http://www.fengshui-168.com/images/common/back.gif" alt="" border="0"></a>
何先生!你好,逆时针转2度,于读数不大符合吧?
用罗盘格取子山午向,红线压在0度---180度上,天池磁针与此线重合,此时,此向并非真北,但读取此向时是否应把罗盘向东转2度呢?
360-2=358 用真北来论线度是:358度---178度 ...
谢何版主指导!
轉貼，請注意<br><br><font face="黑体" size="4">磁北<span style="color: Red;">中午變動最厲害</span>，zhuangly兄說家傳過午不測，<span style="color: Red;">晚上、早晨</span>比較不易受磁暴等磁干擾，說明磁北並非整天都在變動中。何況古人羅盤，一邊是磁針，一邊是日晷</font><span style="color: black;" lang="EN-US"><font face="SimHei" size="4">（定位兼計時，真太陽時）</font></span><font face="黑体" size="4">。日晷求得正北值，另一邊的磁針羅盤，當場可修正，就像電羅盤，當場磁偏多少，當場修正多少，即可當分度器，定度數（1/60度＝1分以下，肉眼無法辨識，只能靠電子儀器，論之無益）</font>
<p> <img src="http://www.wawlhld.com/image-A/LPSL_4.gif" border="0"></p>
<p><font face="黑体" size="4">今人偷懶不用日晷，<span style="color: Red;">利用電腦查詢磁偏，修正為正北，其值只是逼近於正北</span>，那是一種捷法，再耐心的重申一遍，只是一種方便，要正確，請用日晷，要<font color="red">求更</font>精確，請用經緯儀</font></p><p></p><br>
<P><FONT color=blue size=3>应该是这样：以真子午线为中标，并看指<FONT color=red size=4>北</FONT>针这一侧，磁子午线在东边时叫东偏，在西边时叫西偏，如当地是西偏5，读数应往东加5度才是真子午。实际操作可变通为：当得知某地磁偏是西偏5度，可把海底往东（面向盘北顺时针）移5度，即海底线对准周天5度，此时磁北所测读数便是真北读数，不知对否？</FONT></P>
<P><FONT color=#0000ff size=3></FONT> </P>
<P></P>
<font color="blue" size="3">应该是这样：以真子午线为中标，并看指<font color="red" size="4">北</font>针这一侧，磁子午线在东边时叫东偏，在西边时叫西偏，如当地是西偏5，读数应往东加5度才是真子午。实际操作可变通为：当得知某地磁偏是西偏5度，可把海底往东（面向盘北顺时针）移5度，即海底线对准周天5度，此时磁北所测读数便是真北读数，不知对否？</font><br><br><font size="4"><span style="font-family: 黑体;">錯！請看下圖：外圈是正北，內圈是磁北，向西偏。</span><span style="font-family: 黑体;">同一線上，磁北度數<span style="color: Red;">大於</span>正北度數，所以磁北─磁偏＝正北</span></font><br><br><img src="http://www.fengshui-168.com/attachments/month_0807/20080730_b90e24cbfabf44cb665cXamJ5PvdGOHC.jpg" border="0"><br>
<P> </P>
<P> </P>
<P><FONT size=4>外圈是正北，內圈是磁北，向西偏。同一線上<FONT color=blue>（磁北上的读数+磁偏才与正北同一线）</FONT>，磁北度數<FONT color=blue>（内圈已加磁偏的读数）</FONT>大於正北度數，所以磁北─磁偏＝正北<FONT color=blue>（请注意此正北为外圈假想盘读数，而非内圈磁盘读数，外圈永远不变，内圈可变）</FONT></FONT></P>
<P><FONT color=red size=4>如西偏5度：内圈磁北0度+磁偏5度=内圈磁北5度</FONT></P>
<P><FONT color=red><FONT size=4> 内圈磁北5度与外圈正北0度同一线上</FONT><FONT size=4> </FONT></FONT></P>
<P><FONT color=red size=4> 内圈磁北5度＞正北0度</FONT></P>
<P><FONT color=red size=4> 内圈磁北5度-磁偏5度=正北0度</FONT></P>
<P><FONT color=red size=4> 又：内圈磁北30度+磁偏5度=内圈磁北35度</FONT></P>
<P><FONT color=red size=4> 内圈磁北35度与外圈正北30度同一线</FONT></P>
<P><FONT color=red size=4> 内圈磁北35度＞外圈正北30度</FONT></P>
<P><FONT color=red size=4> 内圈磁北35度-磁偏5度=外圈正北30度</FONT></P>
<P><FONT color=red size=4></FONT> </P>
<P><FONT color=red size=4>呵呵，晕了，绕了一个大圈内外度数乱了</FONT></P>
<P><FONT color=#ff0000 size=4></FONT> </P>
<P><FONT color=blue size=4>上图红线为磁北罗盘读数即，相对于外圈真北（蓝线）来说是西偏了，蓝线为真北</FONT></P>
<P><FONT color=#0000ff size=4></FONT> </P>
<P><FONT color=#0000ff size=4>感谢何前辈耐心讲解，继续讨论，上个星期在下用真北为自家开了一个门楼，呵呵</FONT></P>
<P> </P>
[ 本帖最后由 阿新哥 于 2008-12-26 21:18 编辑 ]
<P>补充这个简图可能对大家有用。</P>
<P> </P>
请问在谷歌earth和谷歌地图的北向是磁北还是正北?
请问在谷歌earth和谷歌地图的北向是磁北还是正北?
<font size="2"><font color="#999999">益福堂 发表于 2009-2-18 21:19</font> <a href="http://www.fengshui-168.com/redirect.php?goto=findpost&pid=306125&ptid=19103" target="_blank"><img src="http://www.fengshui-168.com/images/common/back.gif" alt="" border="0"></a></font><font style="font-family: 黑体;" size="6">正北</font>
本帖最后由 益福堂 于 2009-2-18 21:57 编辑
<P> 好象不必吧，知道磁偏把指南针拨向相应偏角，这样指南针所指就是正北了 <FONT size=2><FONT color=#999999>阿新哥 发表于 2008-12-15 20:49</FONT> <A href="http://www.fengshui-168.com/redirect.php?goto=findpost&pid=249001&ptid=19103" target=_blank><IMG alt="" src="http://www.fengshui-168.com/images/common/back.gif" border=0></A></FONT> </P>
<P>谢谢指点!</P>
<P>我的意见是，你说用指南针移位的方法，因为没有了海底红线的参照与之重叠，准确度要降低。</P>
<P>所以不才认为不如先查到当地磁偏度，先把罗盘海底的红线旋转至磁北正线（磁偏角线），调好的罗盘就可以直接读出准确的正北度数与方位。因为这样的话南针还是必须与红线重叠，我认为这样准确度也相对高些。</P>
<P> </P>
<P> </P>
<P>正北 <FONT size=2><FONT color=#999999>何有 发表于 2009-2-18 21:33</FONT> <A href="http://www.fengshui-168.com/redirect.php?goto=findpost&pid=306151&ptid=19103" target=_blank><IMG alt="" src="http://www.fengshui-168.com/images/common/back.gif" border=0></A></FONT> </P>
<P>谢谢何兄指教！看来最简单的问题，如果无人指点还是不行的。</P>
本帖最后由 益福堂 于 2009-2-18 22:17 编辑
<P>接上43楼的话题。不才说的自调的正北罗盘方法是：</P>
<P>比如说：某地的磁偏角是西偏3度，那就把罗盘海底的红线准确的调到357-177度线上。如果是东偏3度，那就把海底的红线调到3-183度的线上。</P>
<P>这样设定的罗盘周天360度也就是正北360度了。使用时，南针还是要与红线准确重叠。</P>
<P>请何兄慕兄指正。</P>
接上43楼的话题。不才说的自调的正北罗盘方法是：比如说：某地的磁偏角是西偏3度，那就把罗盘海底的红线准确的调到357-177度线上。如果是东偏3度，那就把海底的红线调到3-183度的线上。这样设定的罗盘周天360度也 ... <font size="2"><font color="#999999">益福堂 发表于 2009-2-18 22:13</font> <a href="http://www.fengshui-168.com/redirect.php?goto=findpost&pid=306267&ptid=19103" target="_blank"><img alt="" src="http://www.fengshui-168.com/images/common/back.gif" border="0"></a></font>沒錯，<span style="font-weight: bold;">宋代廖金精就是這麼用</span>，現代人也是<span style="font-weight: bold;">根據當地磁偏角度，在指針海底動了手腳，轉了磁偏幾度，不用現場加減，方便測量。</span>不過有效期，大概只有一年，最好一年校正一次，如果磁偏西3度，就將盤面24山的正子，對準357度。<br><br><font size="4"><span style="font-family: 黑体; color: Red;">還要注意下盤時間</span></font>，早晨9點以前，磁針干擾比較小，精度較高。若是中午，磁擾很亂，有時1度，有時15度以上，都有可能！上次與落應俠兄覆一門乾隆古墳，中午在下堅持不下盤，落兄當場下盤，說坐寅山，水出辛，說不清何家理氣。後來，豐年兄來電詢問詳情，才察看該墳衛星圖，竟然是坐正子山。算算寅山與子山差幾度！呵呵！<br><br>順便講個罗盘海底的红线的故事：在下一位三合家的地師朋友，他的羅盤就是如益兄說的。他說學成後，行走江湖，斷案失誤多次，一度懷疑所學是否真法。後來附近有一門大墳被盜，東家約他前往現場，發現竊賊掉了一個小羅盤。這羅盤就是根據磁偏海底移了幾度。他說，為了羅盤贓物，好奇了了好幾天，決定仿效他的羅盤改法。從此，斷案驚人，重拾了門派的信心。<br>
谢谢慕兄指教!
我也有这样的感觉，用正北测方位更精确更可靠。但证据还不充分。要推翻和改变这长期形成的磁北方法方式，不是一朝一夕的事。
不过可以推论的是，用正北方法来形成一定的风水理论生命力理应更强。
祝慕兄心想事成。
這裡有磁羅盤校正的書籍, 提供參考<br><h1>磁罗经校正技术-简体横排清晰版</h1><br> <a href="http://www.fengshui-168.com/viewthread.php?tid=36859" target="_blank">http://www.fengshui-168.com/viewthread.php?tid=36859</a><br><br><a href="http://www.fengshui-168.com/viewthread.php?tid=36860">http://www.fengshui-168.com/viewthread.php?tid=36860</a><br>
只接用真北儀就好了
本帖最后由 阿军 于 2009-2-21 20:07 编辑
<P>不是！要逆時針轉2度＝減2度 <FONT size=2><FONT color=#999999>何有 发表于 2008-12-25 19:09</FONT> <A href="http://www.fengshui-168.com/redirect.php?goto=findpost&pid=258484&ptid=19103" target=_blank><IMG alt="" src="http://www.fengshui-168.com/images/common/back.gif" border=0></A></FONT></P>
<P>虽是减2度，但反贪先锋把罗盘顺时针转2度后的压线读数为坐向也是对的！何兄请再思考！</P>
<P> </P>
<P> </P>
航飞图对看风水有一定的帮助作用吧！
版主，如果不调罗盘，按照实测磁北度数减去西偏度数不行吗？比如实测356度，西偏3度，那么真北是354度，对否？ 48# 何有
比如实测356度，西偏3度，那么真北是354度，对否？353度還要注意下盤時的氣候,盡量避開10-14時段 最好是早上7-9 日照不強時 遮陰下盤
强力支持一把
本帖最后由 秦玄普 于 2009-6-5 21:41 编辑
<P>支持！！何管这个帖子，帮了很多人。。。。</P>
<P> </P>
<P>厚颜请求何管再抽空做个“日晷测真北”教学。 </P>
<P> </P>
<P>感激不尽。。。。</P>
不错，何有兄的方法的确好用！
本帖最后由 笑看风云 于 2009-7-21 19:46 编辑
<P>Declination 11° 17' E＝磁偏角偏東11度17分，──這就是閣下要的磁偏角, 偏東 記得用加法才是正北座標的度數. 如果磁北周天度是30度 正北是30+11.17'= 41度17分 changing by 0° 4' W/year＝每年向西偏0.4度--對 ... <FONT size=2><FONT color=#999999>何有 发表于 2008-8-18 20:58</FONT> <A href="http://www.fengshui-168.com/redirect.php?goto=findpost&pid=159216&ptid=19103" target=_blank><IMG alt="" src="http://www.fengshui-168.com/images/common/back.gif" border=0></A></FONT></P>
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<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: 19.2pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left><SPAN lang=EN-US style="FONT-FAMILY: Verdana; mso-bidi-font-size: 10.5pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"><?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><o:p><FONT color=#000000> </FONT></o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: 19.2pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left><SPAN style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana"><FONT color=#000000>我用何总的提供的测磁偏</FONT></SPAN><SPAN lang=EN-US style="FONT-FAMILY: Verdana; mso-bidi-font-size: 10.5pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"><A href="http://www.ngdc.noaa.gov/geomagmodels/struts/calcDeclination"><SPAN style="COLOR: #2109ff">http://www.ngdc.noaa.gov/geomagmodels/struts/calcDeclination</SPAN></A></SPAN><FONT color=#000000><SPAN style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana">测量过</SPAN><SPAN lang=EN-US style="FONT-FAMILY: Verdana; mso-bidi-font-size: 10.5pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">.</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana">各年各地磁偏</SPAN><SPAN lang=EN-US style="FONT-FAMILY: Verdana; mso-bidi-font-size: 10.5pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">:</SPAN></FONT></P><FONT color=#000000><SPAN lang=EN-US style="FONT-FAMILY: Verdana; mso-bidi-font-size: 10.5pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"><o:p>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: 19.2pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left><SPAN lang=EN-US style="FONT-FAMILY: Verdana; mso-bidi-font-size: 10.5pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"> <o:p></o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: 19.2pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left><SPAN lang=EN-US style="FONT-FAMILY: Verdana; mso-bidi-font-size: 10.5pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"> </SPAN><SPAN style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana">地名</SPAN><SPAN lang=EN-US style="FONT-FAMILY: Verdana; mso-bidi-font-size: 10.5pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"> </SPAN><SPAN style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana">北纬度</SPAN><SPAN lang=EN-US style="FONT-FAMILY: Verdana; mso-bidi-font-size: 10.5pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"> </SPAN><SPAN style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana">东经</SPAN><SPAN lang=EN-US style="FONT-FAMILY: Verdana; mso-bidi-font-size: 10.5pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"> 1900</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana">年</SPAN><SPAN lang=EN-US style="FONT-FAMILY: Verdana; mso-bidi-font-size: 10.5pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"> 1950</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana">年</SPAN><SPAN lang=EN-US style="FONT-FAMILY: Verdana; mso-bidi-font-size: 10.5pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"> 2009</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana">年</SPAN><SPAN lang=EN-US style="FONT-FAMILY: Verdana; mso-bidi-font-size: 10.5pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"><o:p></o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: 19.2pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left><SPAN lang=EN-US style="FONT-FAMILY: Verdana; mso-bidi-font-size: 10.5pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">1</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana">、广州：北</SPAN><SPAN lang=EN-US style="FONT-FAMILY: Verdana; mso-bidi-font-size: 10.5pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">23.073879 </SPAN><SPAN style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana">东</SPAN><SPAN lang=EN-US style="FONT-FAMILY: Verdana; mso-bidi-font-size: 10.5pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">113.145064(</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana">大约值</SPAN><SPAN lang=EN-US style="FONT-FAMILY: Verdana; mso-bidi-font-size: 10.5pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">): 0°08'E 0°55'W 2°31'W<o:p></o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: 19.2pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left><SPAN lang=EN-US style="FONT-FAMILY: Verdana; mso-bidi-font-size: 10.5pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">2</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana">、重庆：北</SPAN><SPAN lang=EN-US style="FONT-FAMILY: Verdana; mso-bidi-font-size: 10.5pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">29.312660 </SPAN><SPAN style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana">东</SPAN><SPAN lang=EN-US style="FONT-FAMILY: Verdana; mso-bidi-font-size: 10.5pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">106.303943(</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana">大约值</SPAN><SPAN lang=EN-US style="FONT-FAMILY: Verdana; mso-bidi-font-size: 10.5pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">): 0°24'E 1°16'W 2°22'W<o:p></o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: 19.2pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left><SPAN lang=EN-US style="FONT-FAMILY: Verdana; mso-bidi-font-size: 10.5pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">3</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana">、上海：北</SPAN><SPAN lang=EN-US style="FONT-FAMILY: Verdana; mso-bidi-font-size: 10.5pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">31.134029 </SPAN><SPAN style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana">东</SPAN><SPAN lang=EN-US style="FONT-FAMILY: Verdana; mso-bidi-font-size: 10.5pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">121.264014(</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana">大约值</SPAN><SPAN lang=EN-US style="FONT-FAMILY: Verdana; mso-bidi-font-size: 10.5pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">): 2°29'W 3°48'W 5°27'W<o:p></o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: 19.2pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left><SPAN lang=EN-US style="FONT-FAMILY: Verdana; mso-bidi-font-size: 10.5pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">4</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana">、北京：北</SPAN><SPAN lang=EN-US style="FONT-FAMILY: Verdana; mso-bidi-font-size: 10.5pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">39.533370 </SPAN><SPAN style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana">东</SPAN><SPAN lang=EN-US style="FONT-FAMILY: Verdana; mso-bidi-font-size: 10.5pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">116.233765(</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana">大约值</SPAN><SPAN lang=EN-US style="FONT-FAMILY: Verdana; mso-bidi-font-size: 10.5pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">): 3°01'W 5°'08'W 6°29'W<o:p></o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: 19.2pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left><SPAN lang=EN-US style="FONT-FAMILY: Verdana; mso-bidi-font-size: 10.5pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"> <o:p></o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: 19.2pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left><FONT color=red><SPAN style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">即每</SPAN><SPAN lang=EN-US style="FONT-SIZE: 10.5pt; FONT-FAMILY: Verdana; mso-bidi-font-family: 宋体; mso-fareast-font-family: 宋体; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">50</SPAN><SPAN style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">年</SPAN><SPAN lang=EN-US style="FONT-SIZE: 10.5pt; FONT-FAMILY: Verdana; mso-bidi-font-family: 宋体; mso-fareast-font-family: 宋体; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">,</SPAN><SPAN style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">向西移约</SPAN><SPAN lang=EN-US style="FONT-SIZE: 10.5pt; FONT-FAMILY: Verdana; mso-bidi-font-family: 宋体; mso-fareast-font-family: 宋体; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">1°20'</SPAN><SPAN style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">度</SPAN><SPAN lang=EN-US style="FONT-SIZE: 10.5pt; FONT-FAMILY: Verdana; mso-bidi-font-family: 宋体; mso-fareast-font-family: 宋体; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">.</SPAN><SPAN style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">即每</SPAN><SPAN lang=EN-US style="FONT-SIZE: 10.5pt; FONT-FAMILY: Verdana; mso-bidi-font-family: 宋体; mso-fareast-font-family: 宋体; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">10</SPAN><SPAN style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">年向西移</SPAN><SPAN lang=EN-US style="FONT-SIZE: 10.5pt; FONT-FAMILY: Verdana; mso-bidi-font-family: 宋体; mso-fareast-font-family: 宋体; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">12~16'/60</SPAN></FONT></o:p></SPAN></FONT><FONT color=red><SPAN lang=EN-US style="FONT-FAMILY: Verdana; mso-bidi-font-size: 10.5pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">度.即每年向西移约1'分.</SPAN></FONT></P>
<P> </P>
都搞复杂了！
就用数码罗盘来说，如果某地测出该地子6---午186，而磁偏角为偏东+6°，那么该地真北为子（6-6）=0---午（186-6）=180，也就是说在磁偏角偏东+6°的地方，磁子6---午186线即是正子午线，根据罗盘测定的坐向度数，偏东磁偏角就减，偏西磁偏角就加，得到的就是真坐向！<br><br>以真子午线为准:磁子午线在东边时叫东偏，东偏为正，用“+”表示；在西边时叫西偏，西偏为负，用“-”表示<br><br>反过来，如果要根据理论上的真北周天定向，那么在偏东角的地方，用未调校的的罗盘定向，就要在理论的度数上加上磁偏角的度数，然后用罗盘找定该结果度数，就得到了理论上想要的坐向了！<br>在偏东的地方，复局时要减（实测数据上减），做局时要加（理论数据上加），都是指未调校磁偏角的罗盘来说的！<br><br>
那位高人能告诉我；广东、丰顺县的磁偏角是多少。谢谢。个人邮箱；shen13891@126.com
那位高人能告诉我；广东、丰顺县的磁偏角是多少。谢谢。个人邮箱；shen13891@126.com
<font size="2"><font color="#999999">鹿民 发表于 2009-8-5 18:10</font> <a href="http://www.fengshui-168.com/redirect.php?goto=findpost&pid=481947&ptid=19103" target="_blank"><img src="http://www.fengshui-168.com/images/common/back.gif" alt="" border="0"></a></font><br><br><b>Declination</b> = 3° 2' W
changing by 0° 4' W/year <br>23.745841° 116.191483°<br><br><font size="4"><span style="font-family: 黑体;">磁偏西 3 度 2 分 /每年偏西 4 分</span></font><br><br><br>
比如北京量磁北为 354度. 地磁偏为 负6度.那么真北是多少?<BR><FONT size="2"><FONT color="#999999">是 354-6=348. 还是354-(-6)=360<BR></FONT></FONT><P><FONT size="2"><FONT color="#999999">走走看看 发表于 2008-10-22 11:51</FONT> <A href="http://www.fengshui-168.com/redirect.php?goto=findpost&pid=205340&ptid=19103" target="_blank"><IMG src="http://www.fengshui-168.com/images/common/back.gif" border="0" alt=""></A></FONT></P><P><FONT size="2"><FONT color="#999999">348</FONT></FONT>度讓龍椅坐歪要殺頭的</P><P><FONT size="2"><FONT color="#999999">360</FONT></FONT>度坐正龍椅子山午向</P>
何有前辈,
我有个疑问,磁偏每年都偏4分,百年,千年后偏了多少?如果无限偏下去会怎么样?是否有周期性的?
广东省信宜市的磁偏角现是多少?
能否告知?谢绝!!!!
在测风水上根本没有必要去计算什么磁偏角，名区域的方向是怎样，风水场就应以所在区域的磁场为准。