Which function transform x,y to latitude/longitude?

From: "Nemo Terry" <ntuser155(at)hotmail(dot)com>
To: pgsql-sql(at)postgresql(dot)org
Subject: Which function transform x,y to latitude/longitude?
Date: 2007-04-25 09:02:02
Message-ID: BAY19-F9735E07E622CE8C977DA8F5490@phx.gbl
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Hi,

For example x= 38356.62 y= 42365.19.how to transform it to latitude 1.399948, longitude 193.92644?

Which function I could use? I don’t know the algorithm.

Initial data is: ("+proj=cass +a=6378137.0 +rf=298.257223563 +lat_0=1.287639n +lon_0=103.8516e +x_0=30000 +y_0=30000").

Thanks a lot.

bill

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