topic Re: Is there a way to select a different Vertical Coordinate System than the defaults when importing GCPs? in ArcGIS Drone2Map Questions

Is there a way to select a different Vertical Coordinate System than the defaults when importing GCPs?

ChristopherPacker2 — Mon, 11 Jul 2016 19:26:43 GMT

Hi,

I am trying to import ground control points from a CSV and there is no NAVD 88 option from the vertical coordinate system dropdown. Is there any way to set this somewhere else? Thanks for the help!

Regards,

Chris

Re: Is there a way to select a different Vertical Coordinate System than the defaults when importing GCPs?

Anonymous User — Thu, 06 Oct 2016 14:34:42 GMT

I have the same question- I'm trying to load GCP with the vertical datum as NAVD88, but the dropdown when importing GCP's into Drone2Map does not have the option to select NAVD88. Options I see are EGM 84, EGM 96, EGM 2008, No Conv, or Const shift without any descriptions on what they are.

Re: Is there a way to select a different Vertical Coordinate System than the defaults when importing GCPs?

DanPatterson_Retired — Sat, 08 Oct 2016 01:18:28 GMT

well it exists somewhere since esri uses it Create Aviation Geodatabase—Help | ArcGIS for Desktop

Re: Is there a way to select a different Vertical Coordinate System than the defaults when importing GCPs?

NickMiller3 — Thu, 17 Nov 2016 00:24:58 GMT

In Australia because D2M doesn't support the Australian Geoid, we set the Vertical coordinate system to Const. Shift. We then edit the Geoid Height to be 41.03716.

Perhaps you can do something similar if you know the Geoid Height for NAVD88?

Re: Is there a way to select a different Vertical Coordinate System than the defaults when importing GCPs?

JamesTaylor3 — Fri, 18 Nov 2016 19:40:39 GMT

Assuming that the xy coordinate system datum is NAD83 and z uses vertical datum of NAVD88, you could use this tool to determine the Geoid12B height above the NAD83 ellipsoid. GEOID12B GEOID HEIGHT COMPUTATION

Just enter a point near your GCPs to get a Geoid Height.

Then when you are importing your GCPs into Drone2Map choose Const Shift and enter the Geoid Height.

Re: Is there a way to select a different Vertical Coordinate System than the defaults when importing GCPs?

GeoRSUH — Tue, 07 Jun 2022 23:16:52 GMT

Hello,

When we use this method, what height should we import from the csv/text file of the GCP - ellipsoidal or orthometric (the GNSS processing report provides both)? I'd like to get the final products in NAVD88 datum (using GEOID12B). I should also mention that the orthometric height provided in the CSRS report is based on the Canadian GEOID CGG2013a.

Thank you