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You indeed still use 3 landmarks, the last one only happen to be really, really far away (North direction) and this is just a special limit case of the previous situation (when the arc of the circle tend to a segment when N tend towards the North direction)
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| See the "Links" link above to find out the sources of the proposed informations Pascal Vuylsteker / eScience / Computer Science / ANU |
Last modified: 20/4/2004
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