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Topic: Location tracking using GPS (Read 308 times) previous topic - next topic

raineee35

Apr 19, 2017, 07:19 pm Last Edit: Apr 26, 2017, 11:15 pm by raineee35
Dear sir,
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"While stationary, you can average locations for 30 minutes to an hour to get an accurate stationary location." https://forum.arduino.cc/index.php?topic=469643.0

 This line i found in forum. Is there any solution to get stable GPS co-ordinate using a cheap GPS module? If there any solution please provide me, it will be really helpful for me.I am new in this sector. It's my first project.
Thanks previously.


jremington

Quote
Is there any solution to get stable GPS co-ordinate using a cheap GPS module?
Only averaging.

Depending on your particular circumstances, many hours of data collection may be required for reasonable accuracy.

Record the output of a fixed GPS module, roughly every 10 minutes, for 1-2 days, and tell us what you find.

raineee35

Do i have to collect the co-ordinate for my hole campus or a specific position of my campus?
Thank you so much sir for responding.

mikb55

While you are moving the GPS will only be able to give your location to within about 5 meters. That's the best you can do with a normal cheap GPS.

While stationary the GPS will tell you that you are moving slowly in random directions centered on your true  location. The long term average of those random movements will give your true location to within a meter or two.


jremington

#4
Apr 20, 2017, 04:17 pm Last Edit: Apr 20, 2017, 04:17 pm by jremington
Quote
Record the output of a fixed GPS module, roughly every 10 minutes, for 1-2 days, and tell us what you find.
"fixed" means the GPS does not move. Try this experiment, you will learn much from it.

raineee35

dear sir,
Here is the co-ordinates for fixed same location ...

11.06-11.16 pm
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Location: 24.012262,89.278762  Altitude: 49.20

Location: 24.012248,89.278755  Altitude: 49.20

Location: 24.012258,89.278747  Altitude: 49.20

Location: 24.012256,89.278747  Altitude: 49.20

Location: 24.012254,89.278747  Altitude: 49.20

Location: 24.012252,89.278747  Altitude: 49.20

Location: 24.012250,89.278739  Altitude: 49.20

Location: 24.012252,89.278739  Altitude: 49.20

Location: 24.012254,89.278739  Altitude: 49.20



11.21-11.31 pm
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Location: 24.012243,89.278770  Altitude: 49.20
Location: 24.012229,89.278800  Altitude: 49.20

Location: 24.012247,89.278762  Altitude: 49.20

Location: 24.012245,89.278762  Altitude: 49.20

Location: 24.012247,89.278762  Altitude: 49.20

Location: 24.012239,89.278762  Altitude: 49.20



1.00-1.10 am
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Location: 24.012315,89.278785  Altitude: 49.20

Location: 24.012310,89.278785  Altitude: 49.20

Location: 24.012317,89.278671  Altitude: 49.20

Location: 24.012281,89.278694  Altitude: 49.20

Location: 24.012254,89.278717  Altitude: 49.20

Location: 24.012203,89.278778  Altitude: 49.20

Location: 24.012207,89.278770  Altitude: 49.20

Location: 24.012237,89.278755  Altitude: 49.20

Location: 24.012250,89.278747  Altitude: 49.20

Location: 24.012250,89.278739  Altitude: 49.20

Location: 24.012248,89.278739  Altitude: 49.20

Location: 24.012247,89.278739  Altitude: 49.20

Location: 24.012247,89.278747  Altitude: 49.20

Location: 24.012245,89.278739  Altitude: 49.20

Location: 24.012245,89.278747  Altitude: 49.20

Location: 24.012247,89.278739  Altitude: 49.20

Location: 24.012248,89.278739  Altitude: 49.20

Location: 24.012248,89.278747  Altitude: 49.20

jremington

#6
Apr 20, 2017, 11:31 pm Last Edit: Apr 20, 2017, 11:41 pm by jremington
What did you learn from that experiment?

raineee35

I learn that the GPS do not provide any stable co-ordinate but near by 10m co-ordinates.But is there any solution??

jremington

#8
Apr 21, 2017, 12:21 am Last Edit: Apr 21, 2017, 12:23 am by jremington
Quote
is there any solution??
See replies #1 and #3.

raineee35

Is it possible to give me a link of demo program/example of averaging the co-ordinate? It will be very help full to me.

Thanks.

-dev

NMEAaverage.ino in the NeoGPS examples.

srnet

Is it possible to give me a link of demo program/example of averaging the co-ordinate? It will be very help full to me.
Thanks.
Whilst the averaging over a period of hours\days might allow you (eventually) to build a co-ordinate map of the obstacles in a particular area, it not going to help a lot in using a presumably hand held device to warn you of the position of the obstacles.

Unless of course you prepared to wait with the handheld device for some hours\days in the same position, so it can also do the same averaging.
 

 
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