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# 好友的BLOG

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### 评论排行榜

1、首先理解地理坐标系（Geographic coordinate system），Geographic coordinate system直译为

em是球面坐标系统。我们要将地球上的数字化信息存放到球面坐标系统上，如何进行操作

Spheroid: Krasovsky_1940
Semimajor Axis: 6378245.000000000000000000
Semiminor Axis: 6356863.018773047300000000
Inverse Flattening（扁率）: 298.300000000000010000

Datum: D_Beijing_1954

--------------------------------------------------------------------------------

Alias:
Abbreviation:
Remarks:
Angular Unit: Degree (0.017453292519943299)
Prime Meridian（起始经度）: Greenwich (0.000000000000000000)
Datum（大地基准面）: D_Beijing_1954
Spheroid（参考椭球体）: Krasovsky_1940
Semimajor Axis: 6378245.000000000000000000
Semiminor Axis: 6356863.018773047300000000
Inverse Flattening: 298.300000000000010000
2、接下来便是Projection coordinate system（投影坐标系统），首先看看投影坐

Projection: Gauss_Kruger
Parameters:
False_Easting: 500000.000000
False_Northing: 0.000000
Central_Meridian: 117.000000
Scale_Factor: 1.000000
Latitude_Of_Origin: 0.000000
Linear Unit: Meter (1.000000)
Geographic Coordinate System:
Name: GCS_Beijing_1954
Alias:
Abbreviation:
Remarks:
Angular Unit: Degree (0.017453292519943299)
Prime Meridian: Greenwich (0.000000000000000000)
Datum: D_Beijing_1954
Spheroid: Krasovsky_1940
Semimajor Axis: 6378245.000000000000000000
Semiminor Axis: 6356863.018773047300000000
Inverse Flattening: 298.300000000000010000

a、球面坐标
b、转化过程（也就是算法）

3、我们现在看到的很多教材上的对坐标系统的称呼很多，都可以归结为上述两种投

posted on 2013-06-26 16:10 杨爱友 阅读(1287) 评论(0)  编辑  收藏

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