[PROJ] How to transform XYZ to NEU

[leiyang at fio.org.cn]

Hi,

I have the  coordinates of XYZ under earth geocentirc system. I would like to transform them to the NEU (North East Up) system which is a GNSS frequently used system.
Now I know the cct could do the transform XYZ to BLH: 
echo 4097216.6805  4429119.0287 -2065771.3676 0 | cct -I +proj=cart +ellps=GRS8047.2292116930  -19.0183060232     1552.9924        0.0000But I do not know how to transform it to NEU. I also checked the documents, and find no answer.Thanks
Lei 



leiyang at fio.org.cn
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.osgeo.org/pipermail/proj/attachments/20201121/7b6a2e85/attachment.html>