Hi,
I have a client that has set up a UTM projection for Botswana. He is unsure if the
projection/datum is correct though. Can anybody shed any insights? A copy of his
text is below. Thanks in advance for your help.
Karl
>I've set up a new class of UTM projections for the region of
>Botswana as follows:
>
>
>"--- Universal Transverse Mercator (Clarke 1880 Modified) ---"
>"UTM Zone 34, Southern Hemisphere (Clarke 1880 Modified)", 8, 19, 7, 21, 0,
>0.9996, 500000, 10000000
>"UTM Zone 35, Southern Hemisphere (Clarke 1880 Modified)", 8, 19, 7, 27, 0,
>0.9996, 500000, 10000000
>"UTM Zone 34.5, Southern Hemisphere (Clarke 1880 Modified)", 8, 19, 7, 24,
>0, 0.9996, 500000, 10000000
>
>These are all calling the CAPE datum (no. 19) but I can seem to find where
>I can check this in MapInfo. That is, I'd like to check the parameters of
>the Cape datum itself as being used by MapInfo. Page 516 of the MapInfo
>Users' Guide (version 5.0) Appendix H says that the CAPE datum is based on
>a Clarke 1880 ellipsoid. Well, this is more or less correct, although the
>CAPE datum is supposed to be based on a Clarke 1880 MODIFIED ellipsoid. I
>belive the appropriate ellipsoid is the Clarke 1880 (modified for ARC) as
>per Page 530 (Appendix I) of the same MapInfo Users' Guide.
>
>I'd like to think that the CAPE datum no. 19 is actually calling for the
>Clarke 1880 (modified for ARC) ellipsoid, but is there a way to
>double-check this is actually the case?
----------------------------------------------------------
Karl Kliparchuk, M.Sc.
McElhanney Consulting Services Ltd.
L100 - 780 Beatty Street
Vancouver, BC Canada
V6B 2M1
Tel (604) 683-8521
Email: [EMAIL PROTECTED]
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