tegwin
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| posted on 21/2/17 at 04:55 PM |
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Any surveyors in the house? GPS measurements
I need to lay out a set of 10 points on the ground and measure their location as accurately as possible using GPS for an aerial survey.
I am aware that survey grade equipment can be expensive and complex... but does anyone know much about surveying?
What is the simplest way to do this? At this stage I would like +-50cm but appreciate that with accuracy comes cost....
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Would the last person who leaves the country please switch off the lights and close the door!
www.verticalhorizonsmedia.tv
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theduck
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| posted on 21/2/17 at 06:05 PM |
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[Edited on 21/2/17 by theduck]
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02GF74
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| posted on 21/2/17 at 06:30 PM |
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My understanding is gps cannot give better than 5 m resolution,.
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tegwin
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| posted on 21/2/17 at 07:05 PM |
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Whilst its true that a single GPS unit can't be that accurate there are ways and technologies to get it down to 1-2cm.
What I lack is the hardware and the knowledge to use said hardware so was after some advice.
[Edited on 21/2/17 by tegwin]
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Would the last person who leaves the country please switch off the lights and close the door!
www.verticalhorizonsmedia.tv
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rgrs
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| posted on 21/2/17 at 07:24 PM |
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Leica Gs25 accuracy is currently 3mm !
Might be worth speaking to https://www.sccssurvey.co.uk/
They should be able to point you in the right direction.
Roger
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02GF74
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| posted on 21/2/17 at 07:32 PM |
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Wow thats amazibg.... so ignore my comment, guerss you learn something everyday.
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coyoteboy
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| posted on 21/2/17 at 07:42 PM |
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Normal single point GPS works to 5m. Sub-5m requires multiple base-stations and differential measurement from them.
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slingshot2000
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| posted on 21/2/17 at 07:43 PM |
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I am sure the people that own the GPS brag about it being more accurate than 5M, wouldn't want the US military chucking a Tomahawk through the
wrong Jihadi's window, would we ?
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coyoteboy
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| posted on 21/2/17 at 07:50 PM |
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They're not GPS driven when in close range of the target IIRC, they're generally laser designated if they need more accuracy. 5m is less
than the length of a normal estate car.
Some nice info here:
https://www.ordnancesurvey.co.uk/business-and-government/help-and-support/navigation-technology/gps-beginners-guide.html
[Edited on 21/2/17 by coyoteboy]
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