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MAPPING TRAPS
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<blockquote data-quote="Zengeo" data-source="post: 369793" data-attributes="member: 9979"><p>Yeah guys if you're using maps older than 1994, the grid locations when compared against a modern GPS unit will be out by about that. ??</p><p>The introduction of the MGA94 grid from AMG66 moved the same location about 164m (or something pretty close) to the NE in coordinates, in WA at least. Probably similar elsewhere. </p><p>That's not a huge amount in the big picture of things but if you need accuracy then obviously it's a hell of a lot.</p><p>And just to make things 'better' there's going to be another grid change in the next few years. But I think this one will only move by a few metres. I'm sure it all makes life easier for someone....!</p></blockquote><p></p>
[QUOTE="Zengeo, post: 369793, member: 9979"] Yeah guys if you're using maps older than 1994, the grid locations when compared against a modern GPS unit will be out by about that. ?? The introduction of the MGA94 grid from AMG66 moved the same location about 164m (or something pretty close) to the NE in coordinates, in WA at least. Probably similar elsewhere. That's not a huge amount in the big picture of things but if you need accuracy then obviously it's a hell of a lot. And just to make things 'better' there's going to be another grid change in the next few years. But I think this one will only move by a few metres. I'm sure it all makes life easier for someone....! [/QUOTE]
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MAPPING TRAPS
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