求翻译讲解WPS之地图投影

ghwrf

最近看WRF手册，看WPS这一章的时候，关于地图投影有两段话，看了好几篇硬是没看明白说的什么，求达人翻译讲解下，十分感谢！
When configuring a rotated latitude-longitude grid, the namelist parameters pole_lat,
pole_lon, and stand_lon are changed from their default values. The parameters
pole_lat and pole_lon specify the latitude and longitude of the geographic north pole
within the model’s computational grid, and stand_lon gives the rotation about the
earth’s axis. In the context of the ARW, the computational grid refers to the regular
latitude-longitude grid on which model computation is done, and on whose latitude
circles Fourier filters are applied at high latitudes; users interested in the details of this
filtering are referred to the WRF Version 3 Technical Note, and here, it suffices to note
that the computational latitude-longitude grid is always represented with computational
latitude lines running parallel to the x-axis of the model grid and computational longitude
lines running parallel to the y-axis of the grid.  

If the earth’s geographic latitude-longitude grid coincides with the computational grid, a
global ARW domain shows the earth’s surface as it is normally visualized on a regular
latitude-longitude grid. If instead the geographic grid does not coincide with the model
computational grid, geographical meridians and parallels appear as complex curves. The
difference is most easily illustrated by way of example. In top half of the figure below,
the earth is shown with the geographical latitude-longitude grid coinciding with the
computational latitude-longitude grid. In the bottom half, the geographic grid (not shown)
has been rotated so that the geographic poles of the earth are no longer located at the
poles of the computational grid.

问题已解决：
这两段讲的大概是旋转投影，之前对这个没有概念，现在弄明白了，主要就是麦卡托投影的时候改变柱面和地轴的
交角，这样可以调整研究地区的地图比例尺，以免失真过大。旋转投影后，地理的极点位置就不在90度了，pole_lat and pole_lon给定其位置，另外一个是stand_lon gives the rotation about the earth’s axis. 我的理解是旋转之后的地轴和原来地轴的交角由stand_lon 表示。但不知道对不，希望讨论。

天目神眉

@言深深，我六级未过。楼主，你应该把你不懂的句子圈出来吧，总不能让别人给你全段翻译吧，

言深深

天目神眉 发表于 2012-4-19 17:24

                               
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@言深深，我六级未过。楼主，你应该把你不懂的句子圈出来吧，总不能让别人给你全段翻译吧 ...

深深留级也木有过啊，压力挺大！不过支持博士的说法，这么一大段，要翻译还是比较困难的，建议楼主用灵格斯在线词典，应该是能够通读下来的