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Include G1762 realization of WGS 1984 into transformation to SJTSK

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03-31-2025 06:45 AM
Status: Open
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PancovaMarketa
by
Occasional Contributor

Could you please include G1762 realization of WGS1984  (wkid 9057) into the transformation to S-JTSK for Czech republic area (S_JTSK_To_WGS_1984_1, wkid 1623)? ICAO recommends to use G1762 realization for aeronautical data and it is set as the default target GCS in the Aviation Charting tool that creates AIS geodatabase.

We have troubles to view data in G1762 together with our data in S-JTSK. The positions get shifted about 120m when no transformation is used. No appropriate transformation is offered in ArcGIS Pro.

@DavidWickliffe , @RomanJanecek
Logged as Esri Support Case #03865208

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3 Comments
DavidWickliffe
by Esri Contributor
‎04-02-2025 01:06 PM

Hi @PancovaMarketa   Thanks for bringing this up.  We will look into this.

PancovaMarketa
by
‎06-26-2025 03:41 AM

Information provided by Esri Technical Support:
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The solution will be for the user to apply the transformations listed in the article (https://support.esri.com/en-us/knowledge-base/wgs-1984-is-not-what-you-think-000036058) from G1762 to the WGS 1984 realization that represents the collection timeframe for their data. Finally, redefine the output data as plain GCS_WGS_1984 without the reference to the realization, in order to apply the transformation to S-JTSK.

While stepping through the necessary transformations, they can do 2 in the sequence on-the-fly in the map. If they need to write output, they can use Project tool and build their own custom transformation path with as many transformation as they need in sequence to write the output data from the transformation sequence.

In order to implement this solution the user will have to install the "ArcGIS Coordinate System Data for ArcGIS Pro per user install" that can be downloaded from MyEsri.

This workaround will be needed until the Czech government is able to provide a more current transformation between WGS84_(G1762) and S-JTSK.
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