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how to project coordinate system WGS-84 to...   fauzul Azhan Jun 11, 2005
Re: how to project coordinate system WGS-84...   Melita Kennedy Jun 13, 2005
Re: how to project coordinate system WGS-84...   fauzul Azhan Jun 17, 2005
Re: how to project coordinate system WGS-84...   Melita Kennedy Jun 17, 2005
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Subject how to project coordinate system WGS-84 to RSO 
Author fauzul Azhan 
Date Jun 11, 2005 
Message hello. I have data in shapefile but have WGS-84 coordinate system.I want the data in RSO coodinate system.I'am new in Arcgis.As I know.I need to define the WGS-84 first then project it with arctools using arcgis 9.But when i click at define the project,the data already define in WGS-84 so what can i do after that?Can some body help me to give a correct step to project the coordinate system so that the data i have in RSO coordinate system so that i can overlay the existing data which are in RSO coordinate system. 
  Post graduate Student
Malaysia, 
   
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Subject Re: how to project coordinate system WGS-84 to RSO 
Author Melita Kennedy 
Date Jun 13, 2005 
Message Hello,

If the the current coordinate system of the data is correct, you can now use the Project Tool to project/transform the features in the existing shapefile to a new one that uses the RSO coordinate system.

You have to have v9.0 or 9.1. RSO was not supported at version 8.3 or earlier.

If the other data has RSO as the defined coordinate system, ArcMap should already be able to overlay the data on-the-fly.

You will need to set a geographic (datum) transformation from WGS84 to Kertau or Timbalai. There are several transformations that are good for different areas, so check in the desktop help, table of contents, map projections. The first topic has link to PDF files. One of them has lists of the supported geographic transformations and their areas of use.

Melita Kennedy
ESRI Product Specialist 
  Melita Kennedy
ESRI Product Specialist 
   
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Subject Re: how to project coordinate system WGS-84 to RSO 
Author fauzul Azhan 
Date Jun 17, 2005 
Message I confius why we need to Define Projection ?If my existing data is in a correct coordinate system RSO .Did it need to define it?why my arcgis 8.3 have kertau.prj in coordinate system folder.Can i use it? 
  Post graduate Student
Malaysia, 
   
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Subject Re: how to project coordinate system WGS-84 to RSO 
Author Melita Kennedy 
Date Jun 17, 2005 
Message Hello,

You are correct that you do not need to use the Define Projection wizard.

Kertau.prj is a geographic coordinate system--much like WGS84. It is for latitude/longitude data. Version 8.3 doesn't support the RSO projection in desktop ArcGIS.

If you have ArcInfo workstation, it supports a version of RSO, but it might not match what you want to use. The data would have to be in the coverage format, as workstation can't project shapefiles or gdb feature classes.

Melita 
  Melita Kennedy
ESRI Product Specialist