How to choose transformation method for vertical spatial reference

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01-19-2020 10:42 PM
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We are using ArcGIS Pro 2.4. And we are projecting some raster data from Hong Kong 1980 (horizontal) + Hong Kong Principal Datum (vertical) to WGS84 + EGM96 using Project Raster tool. We know we should take "Vertical" checkbox in the tool, and tool automatically suggests "Hong_Kong_1980_To_WGS_1984_1" as horizontal transformation method. But what method should we use for vertical transformation (HKPD to EGM96)? Is there a full list of transformation method we can refer to? 

Thank you

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