ArcMap Convert Data from WGS84 to SVY21 TM (Singapore SLA)

1. First create a custom Geographic Transformation as following:

1

You can select the input GCS and output GCS from ESRI projection list:

GCS => World => WGS 1984

PCS => National Grids => Malaysia and Singapore => SVY21_Singapore_TM

2. Project Data: select From_WGS84_to_SVY21 for the last option(just now created)

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3. It’s a reverse step to do the SVY21 to WGS 1984 conversion.

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