[PROJ] How to transform XYZ to NEU

[Lesparre, Jochem]

Hi Lei,

For the conventional use of ENU for GNSS station coordinates you only need to use the first three parameters (latitude, longitude and height) and you should set the other 5 parameters to zero.

Regards, Jochem


From: leiyang at fio.org.cn <leiyang at fio.org.cn>
Sent: zaterdag 21 november 2020 15:39
To: Lesparre, Jochem <Jochem.Lesparre at kadaster.nl>; proj <proj at lists.osgeo.org>
Subject: Re: [PROJ] How to transform XYZ to NEU

hi,Jochem
Thank you for your bat codes.  I try to run it on my computer.  It needs a bit more input parameters that is not easy for me.
The GNSS community have mature codes that can do the transformation fast and easy. But may not open source.

Kind regards,
Lei

---Original---
From: "Lesparre, Jochem"<Jochem.Lesparre at kadaster.nl<mailto:Jochem.Lesparre at kadaster.nl>>
Date: Sat, Nov 21, 2020 13:51 PM
To: "proj"<proj at lists.osgeo.org<mailto:proj at lists.osgeo.org>>;"leiyang at fio.org.cn<mailto:leiyang at fio.org.cn>"<leiyang at fio.org.cn<mailto:leiyang at fio.org.cn>>;
Subject: Re: [PROJ] How to transform XYZ to NEU

Hi Lei,

Although some users have asked for this feature before, there is no specific PROJ functionality for this. However, you can do the transformation with cct if you use the right parameters:
https://github.com/OSGeo/PROJ/issues/500

Regards, Jochem

________________________________
From: PROJ <proj-bounces at lists.osgeo.org<mailto:proj-bounces at lists.osgeo.org>> on behalf of leiyang at fio.org.cn<mailto:leiyang at fio.org.cn> <leiyang at fio.org.cn<mailto:leiyang at fio.org.cn>>
Sent: Saturday, 21 November 2020, 02:13
To: proj
Subject: [PROJ] How to transform XYZ to NEU

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=GRS80

47.2292116930  -19.0183060232     1552.9924        0.0000

But 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<mailto:leiyang at fio.org.cn>



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