GIS之坐标系

短命女 2023-06-16 08:17 22阅读 0赞

### 常的的坐标系 ###

<table> 
 <thead> 
  <tr> 
   <th align="left">坐标系名</th> 
   <th>北京54</th> 
   <th>西安80</th> 
   <th>WGS84</th> 
   <th>CGCS2000</th> 
  </tr> 
 </thead> 
 <tbody> 
  <tr> 
   <td align="left">参考椭球</td> 
   <td>Krasovsky_1940</td> 
   <td>IAG75(ArcGIS中标注是Xian_1980椭球)</td> 
   <td>WGS_1984</td> 
   <td>CGCS2000</td> 
  </tr> 
  <tr> 
   <td align="left">椭球权半径b</td> 
   <td>6356863.0187730473</td> 
   <td>6356755.288158</td> 
   <td>6356752.3142451795</td> 
   <td>6356752.3141403558</td> 
  </tr> 
  <tr> 
   <td align="left">椭球赤道半径a</td> 
   <td>6378245.000000</td> 
   <td>6378140.000000</td> 
   <td>6378137.000000</td> 
   <td>6378137.000000</td> 
  </tr> 
  <tr> 
   <td align="left">扁率</td> 
   <td>1/298.3</td> 
   <td>1/298.25722101</td> 
   <td>1/298.257223563</td> 
   <td>1/298.257222101</td> 
  </tr> 
  <tr> 
   <td align="left">参考水平面</td> 
   <td>56黄海</td> 
   <td>85黄海</td> 
   <td>-</td> 
   <td>85黄海</td> 
  </tr> 
  <tr> 
   <td align="left">ArcGIS中的名称</td> 
   <td>GCS_Beijing_1954</td> 
   <td>GCS_Xian_1980</td> 
   <td>GCS_WGS_1984</td> 
   <td>GCS_China_Geodetic_Coordinate_System_2000</td> 
  </tr> 
  <tr> 
   <td align="left">ArcGIS中的WKID</td> 
   <td>4214</td> 
   <td>4610</td> 
   <td>4326</td> 
   <td>4490</td> 
  </tr> 
 </tbody> 
</table>

### 本地坐标与世界坐标的区别 ###

本地坐标怎么定义，世界坐标怎么定义，一张图看懂  
![局部坐标与世界坐标][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3lvdWxpbmh1YW55YW4_size_16_color_FFFFFF_t_70]

### 本地坐标与实现坐标的转换 ###

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3lvdWxpbmh1YW55YW4_size_16_color_FFFFFF_t_70]: https://img-blog.csdnimg.cn/20191125165058141.jpg?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3lvdWxpbmh1YW55YW4=,size_16,color_FFFFFF,t_70