Subject:
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Re: GPS (was: mindstorms NXT and memory)
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Newsgroups:
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lugnet.robotics
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Date:
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Wed, 11 Jan 2006 04:07:32 GMT
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Original-From:
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steve <sjbaker1@/Spamless/airmail.net>
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Viewed:
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1564 times
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Ignacio Martinez Vazquez wrote:
> > Hm. Well, when surveying I've sometimes used differential GPS (locating cave entrances, truth be told). This can get down to centimeter resolution IF you want to wait a long time, but certainy far better than 1 meter. Two NXT's with GPS, one as a base station (stationary) to do differential GPS with?
>
>
> Cool! Might be complicated to calculate with the NXT, but I'm sure
> there's a way (PIC PIC PIC :). But how do you accurately find the
> coordinates of the base station? Google earth :P?
Well, Google earth isn't going to get you very far - the best precision
it has is something like a half meter - but the photographs are likely
to be aligned with real-world lat/lon coordinates using non-differential
GPS.
But what does your robot care about knowing it's EXACT lat/long?
In most cases, your only concern is how where you are relative to
some fixed point (which can be the base station) - you don't care
where you are on the entire surface of the earth.
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Message is in Reply To:
 | | Re: GPS (was: mindstorms NXT and memory)
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| (...) Cool! Might be complicated to calculate with the NXT, but I'm sure there's a way (PIC PIC PIC :). But how do you accurately find the coordinates of the base station? Google earth :P? (18 years ago, 11-Jan-06, to lugnet.robotics)
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