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-------- Original message --------
From: Tito Sanchez <[log in to unmask]>
Date: 5/30/23 3:44 PM (GMT-05:00)
To: [log in to unmask]
Subject: Position issue with Leica GG04 Plus - SOLVED!!

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*Message sent from a system outside of UConn.*

Hi All,

 

I shared a technical problem I encountered with my Leica GG04 Plus a few weeks ago and received numerous insightful responses. Thank you to all who responded!

 

I am pleased to inform you that we successfully identified the root cause and devised a viable resolution.

 

If you are utilizing an identical setup (see below), it has been determined that the issue relates to a datum shift problem, as suspected. The crucial step is to create a precise profile (which required some time to resolve) with the correct datum transformation within Field maps, ensuring seamless alignment between the two apps. It is worth noting that the "Default" profile within Field Maps causes the datum shift, resulting in incorrect alignment of your location with the base map. Please refer to the details below for further clarification:

 

My Set Up:

Tablet: Samsung Galaxy Tab S7 FE 5G

Model Name: SM-T738U

 

Field Maps version: 23.1.1, Build 1405

 

GPS Unit: Leica GG04 Plus

Leica App: Leica Zeno Connect

Realtime Corrections: MaCORS


Steps:

Open your Leica Zeno Connect App on your tablet and select the following under settings:

 

Geographic Coord. System: WGS 1984

Geoid Model: MAGeoid12B GRS80.gem

Datum Transformation: None (you set this in field maps later)

 

Connect to your GPS unit.

 

Open up Field Maps and create a new profile using the following parameters:

 

GNSS coordinate system: GCS NAD 1983 2011 (WKID 6318)

Map Coordinate System: WGS 1984 Web Mercator Auxiliary Sphere (WKID 3857)

Horizontal datum transformation: ~WGS_1984_(ITRF08)_To_NAD_1983_2011 (USA – CONUS and Alaska;PRVI

 

Feel free to reach out to me if you are having trouble with setting this up correctly or if you have any questions/comments.

 

Regards,

 

Tito

 

Tito Sanchez, GISP

Senior Project Manager/GIS & Asset Management

BETA Group, Inc. - Celebrating 35 Years

BETA Group, Inc.
401.333.2382

 

Build your future at BETA. Apply now!



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