the question about round, truncate

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Dear all.

 

I have a question about round, truncate.

 

I want to   fix the data like 3-digit decimal after being rounded on 4-digit decimal.

 

Ex. Geometryformat(‘linestring((54.11238742 22.023498293, 35.128937123 94.129837123))’,-1);

     -------> #######(‘linestring((54.112 22.023, 35.129 94.130))’,-1);

 

What should I do?

 

I want to use the round, truncate command.

 

I’m sorry my English is poor.

 

 

Best regards and thanks in advance.

 

Kevin.


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