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Height Modernisation ICSM GTSC F2F September 2004.

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Presentation on theme: "Height Modernisation ICSM GTSC F2F September 2004."— Presentation transcript:

1 Height Modernisation ICSM GTSC F2F September 2004

2 What JP’s are included so far

3 What else do we have QLD (~ 290 extra points) NSW (~70 new test points) SA (~50 SASZ points) WA (Perth Metro and other GPS points) TAS (lower order GPS – AHD test points) NT (TGN points)

4 What have we been doing Jurisdictions checking ANLN height difference looking for improvements Jurisdictions checking adopted BM heights GA, Curtin, Uni Melb looking at gridding / surface fitting algorithms GA updating sections where they need it (WA and SA)

5 Points in ANLN adjustment 6000’s are JP connection 9000’s are GPS only points

6 First attempt at Surface fitting 85% under 0.3m

7 What’s coming up Produce preliminary correction surface with AG98 for testing AUSgeoid200? development (late 2004) Produce new combined geoid / correction model Release to jurisdictions for testing

8 How will it be done Curtin recommend collocation using all possible data including “test” data Testing done by iteratively removing one point at a time Need uncertainties on AHD values and ellipsoidal heights


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