Reference Frame
        On-line GPS Processing
        Here is a list of some of the on-line GPS 
		processing internet web pages available. 
        
          
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            Service provided by JPL | 
           
          
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            Service provided by Geoscience Australia | 
           
          
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            Service provided by NGS, USA | 
           
          
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            Service provided by SOPAC, USA | 
           
          
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            Service provided by Natural Resources, Canada | 
           
          
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            Service provided by the National Land Survey of 
			Finland | 
           
          
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            Service provided by Lantmäteriet (the National Land 
			Survey of Sweden) (in Swedish) | 
           
         
        Permanent GNSS Networks
        Global
        
        Regional
        
          
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			APREF | 
            
            The Asia-Pacific Reference Frame (APREF) is an initiative to create 
			and maintain an accurate geodetic framework to meet the growing 
			needs of industries, science programs and the general public using 
			positioning applications in the Asia-Pacific region. | 
           
          
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            EUREF Permanent Network | 
            
            
            European GNSS Network | 
           
          
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            Europe | 
            
            Leica Networks 
			operators in Europe | 
           
          
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             South America  | 
            
             SIRGAS  | 
           
         
        National
        
        Global and Regional Reference Frame 
        
          
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            ITRF  | 
            
             
            International Terrestrial Reference Frames homepage  | 
           
         
        Africa
        
        
		AFREF
        is a project for the creation of a unified African Reference Frame. 
		Richard Wonnacott (South Africa) presented during FIG Working Week 2005 
		in Cairo a paper on the progress of AFREF. This paper was also 
		considered to be the Article of the Month (June, 2005) for FIG.
        
        Here is the paper 
        Asia
        United Nations 
		Global Geospatial Information Management Asia Pacific (UNGGIM-AP)
		 
		UNGGIM-AP has a working group titled “UN-GGIM-AP 
		WORKING GROUP 1 Geodetic Reference Framework for Sustainable Development”  
        Australia
        
        
        Geocentric Datum of Australia  
        Europe
        
          
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            CRS 
			FOR EUROPE  | 
            
             
            This is a internet portal maintained by BKG (Germany) describing the 
			coordinate reference systems in Europe as well as the European 
			Vertical Reference System.  | 
           
          
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            EUREF   | 
            
             
            The IAG Subcommission for Europe is working actively with the 
			European reference systems as well as the national realisations.  | 
           
          
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            European Combined Geodetic Network   | 
            
             
            ECGN integrates the European reference systems and gravity and can 
			be considered as the European contribution to GGOS  | 
           
          
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            NCG  | 
            
             
            Netherlands Geodetic Commission  | 
           
          
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            NKG  | 
            
             
            Nordic Geodetic Commission  | 
           
         
        North America
        
          
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            NAREF  | 
            
             
            Regional Reference Frame for North America   | 
           
         
        Central and South America
        
        SIRGAS 
		is a project for the creation of a unified South American and 
		Central American Reference Frame  
        
        If you notice that a link is erroneous, have changed 
		or if you have other good web links that could be included, please 
		notify the chair(s) of the working group.  |