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GEOID12B has been superceded</div>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" color="#000000" style="font-size:11pt"><b>From:</b> PROJ <proj-bounces@lists.osgeo.org> on behalf of YK_climate <julien.schroder@gmail.com><br>
<b>Sent:</b> Friday, November 1, 2019 3:12 PM<br>
<b>To:</b> proj@lists.osgeo.org <proj@lists.osgeo.org><br>
<b>Subject:</b> [PROJ] Needs a sanity check on Vertical Transformation</font>
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<div class="PlainText">Hello,<br>
I have been trying to perform vertical transformation with Proj for a few<br>
days now, I think I am done but I am in some help to be sure I didn't make<br>
some stupid mistakes!<br>
I am looking at getting coordinates in WGS84-Ellipsoid to WG84-EGM96,WG84-<br>
EGM2008 and to NAD83(2011)GEOID12B.<br>
<br>
Here is what I have working so far : <br>
WGS84-EGM2008 : cs2cs EPSG:4979 EPSG:4326+3855<br>
WGS84-EGM96 : cs2cs EPSG:4979 EPSG:4326+5773<br>
Is this correct?<br>
<br>
So naturally I thought that GEOID12B would be as easy : <br>
NAD83(2011)-GEOID12B : cs2cs EPSG:4979 EPSG:6319+5703 <= no vertical<br>
change<br>
NAD83(2011)-GEOID12B : cs2cs EPSG:4979 EPSG:5498 <= no vertical<br>
change<br>
<br>
After reading about geoidgrids I tried this and it works but I need to be<br>
sure I am using the right parameters<br>
cs2cs EPSG:4979 "+proj=longlat +datum=NAD83 +geoidgrids=g2012bu0.gtx"<br>
<br>
Thank you for your time!<br>
<br>
<br>
<br>
<br>
--<br>
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