ArcGIS custom coordinate system (taking Albers as an example)

Recently, the image needs to be projected and converted , You need to customize the coordinate system , suffer 2013 Articles from ArcGIS Custom coordinate system ( With Albers For example ) Inspired by, completed the relevant work , There is a fly in the ointment , Failed to load all the graphs of the article , This article can be used as a supplement to this article .

If needed arcpy Batch conversion data projection , You can refer to arcpy Batch conversion data projection （ With Albers For example ）.

First , Click on “ Layers ”, Right click and click “ attribute ”, choice “ Coordinate system ”, Click on “ Choose a coordinate system ”, choice “ newly build ” Then click “ Projection coordinate system （P）”, As shown in the figure below .

Enter the name of the custom coordinate system in name “Albers_test1”; Select... In the name of the projection Albers, Then set the Standard_Parallel_1（ First standard weft ） by 20,Standard_Parallel_2（ The second standard weft ） by 40,Central_Meridian（ The central meridian ） by ：0,Latitude_Of_Origin（ Starting point ） by ：0,False_Easting（ East pseudo offset ） and False_Northing（ North pseudo offset ） It's also set to 0; Select the name in linear units as Meter. stay ArcGIS in , Each projection coordinate system contains a geographic coordinate system . The geographic coordinate system now selects the default GCS_WGS_84. Click... After setting the parameters “ application ” Click later “ confirm ”, As shown in the figure below .

The newly created coordinate system is in the user-defined folder .

Because the image distortion at low latitude is relatively small , This paper selects the north latitude 37~62° Display the data between , The new coordinate system only needs to be changed Standard_Parallel_1（ First standard weft ） by 40,Standard_Parallel_2（ The second standard weft ） by 60, Other parameters unchanged .

The original image has a resolution of 0.25° The image of （GCS_WGS_84 Projection ）, The image center coordinates are (0°, 50°N), The circle in the image is the center distance 800 Kilometers buffer, It can be seen that the distortion is relatively large , The distortion problem is much smaller after using self-determined projection .

Welcome criticism .