Hi Everyone,
Does any have any experience in testing the GPS for Samsung tablet? I have
read online that Samsung tab2 GPS is not accurate when it's offline but
when you have internet connection it will be able to triangulate real time
GPS. Could you please share your experience ? I am thinking of just
getting a tablet with no mobile internet function .
Thank you!
Hi Ann,
I am not sure why that would be the case. When on-line, you can use
wireless networks and A-GPS to get a fix quicker, however, I think the
accuracy you get from off-line use of the tablet is good.
In fact, I ran a test where I recorded tracks using a Samsung Galaxy III, a
larger, non-brand smartphone and the tablet (no SIMS, so no data
connectivity) and it turned out that the tablet was able to get a more
accurate fix (I overlaid the resulting tracks over satellite imagery in the
vicinity of my house) compared to the two other devices.
It actually seemed like the bigger the phone, the better the accuracy.
Though this would of course only be the case if the producers decided to
stick a bigger antenna in the device when room allowed. I only had three
data points so I can't vouch for that to work accross the board.
Hope this helps!
j
Hi Everyone,
Does any have any experience in testing the GPS for Samsung tablet? I have
read online that Samsung tab2 GPS is not accurate when it's offline but
when you have internet connection it will be able to triangulate real time
GPS. Could you please share your experience ? I am thinking of just
getting a tablet with no mobile internet function .Thank you!
--
Post: opendatakit@googlegroups.com
Unsubscribe: opendatakit+unsubscribe@googlegroups.com
Options: http://groups.google.com/group/opendatakit?hl=en
You received this message because you are subscribed to the Google Groups
"ODK Community" group.
To unsubscribe from this group and stop receiving emails from it, send an
email to opendatakit+unsubscribe@googlegroups.com.
For more options, visit https://groups.google.com/groups/opt_out.
Hi
I have tested a number of rugged phones in the field but never a tablet. We
have been using the Samsung xcover 1, after a series of tests against other
devices, for our Guyana project but we are testing the new samsung xcover 2
for our new Acre in Brazil and finding the GPS much better.
In Guyana with the xcover 1 we found it took a long time to gain a GPS
reading - two tricks helped. Firstly use an app like GPS status to kick the
phones GPS into life and allow it to gain a satellite fix, then start ODK
and begin collecting data, it speeds up the GPS coordinate capture time in
ODK significantly. Also we found GPS under canopy slow, so in these
instances we used an external bluetooth dedicated GPS device that also
really helped - you can pick one up for £30-£50.
Jon
A device's GPS accuracy has nothing to do with its data connection, it's a
matter of whatever radio chip it's got running. The only thing a data
connection does is shorten the time of the initial fix, and so subsequent
ones are significantly faster.
GPS is faster, and more accurate when you have a clear view of the sky
above you. So, working under a canopy (inside rooms, or between many tall
buildings, etc.) makes it more difficult to get an accurate fix, or
sometimes impossible.
If you collect geopoints with the map widget, then you require a data
connection. If you use plain old geopoints, then a data connection is not
necessary.
Nik
Hi Everyone,
Does any have any experience in testing the GPS for Samsung tablet? I have
read online that Samsung tab2 GPS is not accurate when it's offline but
when you have internet connection it will be able to triangulate real time
GPS. Could you please share your experience ? I am thinking of just
getting a tablet with no mobile internet function .Thank you!
--
Post: opendatakit@googlegroups.com <javascript:_e({}, 'cvml',
'opendatakit@googlegroups.com');>
Unsubscribe: opendatakit+unsubscribe@googlegroups.com <javascript:_e({},
'cvml', 'opendatakit%2Bunsubscribe@googlegroups.com');>
Options: http://groups.google.com/group/opendatakit?hl=en
You received this message because you are subscribed to the Google Groups
"ODK Community" group.
To unsubscribe from this group and stop receiving emails from it, send an
email to opendatakit+unsubscribe@googlegroups.com <javascript:_e({},
'cvml', 'opendatakit%2Bunsubscribe@googlegroups.com');>.
For more options, visit https://groups.google.com/groups/opt_out.
Hi J,
Thank you for taking time in responding with my question.. I agree that in
you don't need to get an internet connection to get the accuracy of the gps
and it's more on getting the gps fix quicker.
Note that there was a change in ODK Collect 1.3 rev 1025 so that it now
discards the first GPS location returned by the Android OS. Reports from
the field noted that under some rare conditions, a very stale GPS
coordinate was being returned with an incorrectly fine accuracy estimate.
If you have an older version of ODK Collect, you should upgrade to the
latest version, as this may be contributing to your reporting problems.
Hi J,
Thank you for taking time in responding with my question.. I agree that
in you don't need to get an internet connection to get the accuracy of the
gps and it's more on getting the gps fix quicker.On Thursday, September 5, 2013 12:15:46 AM UTC+8, Jitka Hiscox wrote:
Hi Ann,
I am not sure why that would be the case. When on-line, you can use
wireless networks and A-GPS to get a fix quicker, however, I think the
accuracy you get from off-line use of the tablet is good.In fact, I ran a test where I recorded tracks using a Samsung Galaxy III,
a larger, non-brand smartphone and the tablet (no SIMS, so no data
connectivity) and it turned out that the tablet was able to get a more
accurate fix (I overlaid the resulting tracks over satellite imagery in the
vicinity of my house) compared to the two other devices.It actually seemed like the bigger the phone, the better the accuracy.
Though this would of course only be the case if the producers decided to
stick a bigger antenna in the device when room allowed. I only had three
data points so I can't vouch for that to work accross the board.Hope this helps!
jOn Wed, Sep 4, 2013 at 8:36 AM, AnnM annm...@gmail.com wrote:
Hi Everyone,
Does any have any experience in testing the GPS for Samsung tablet? I
have read online that Samsung tab2 GPS is not accurate when it's offline
but when you have internet connection it will be able to triangulate real
time GPS. Could you please share your experience ? I am thinking of just
getting a tablet with no mobile internet function .Thank you!
--
Post: opend...@googlegroups.com
Unsubscribe: opendatakit...@**googlegroups.comOptions: http://groups.google.com/**group/opendatakit?hl=enhttp://groups.google.com/group/opendatakit?hl=en
You received this message because you are subscribed to the Google
Groups "ODK Community" group.
To unsubscribe from this group and stop receiving emails from it, send
an email to opendatakit...@**googlegroups.com.For more options, visit https://groups.google.com/**groups/opt_outhttps://groups.google.com/groups/opt_out
.--
--
Post: opendatakit@googlegroups.com
Unsubscribe: opendatakit+unsubscribe@googlegroups.com
Options: http://groups.google.com/group/opendatakit?hl=en
You received this message because you are subscribed to the Google Groups
"ODK Community" group.
To unsubscribe from this group and stop receiving emails from it, send an
email to opendatakit+unsubscribe@googlegroups.com.
For more options, visit https://groups.google.com/groups/opt_out.
--
Mitch Sundt
Software Engineer
University of Washington
mitchellsundt@gmail.com
Note that there was a change in ODK Collect 1.3 rev 1025 so that it now discards the first GPS location returned by the Android OS. Reports from the field noted that under some rare conditions, a very stale GPS coordinate was being returned with an incorrectly fine accuracy estimate.
If you have an older version of ODK Collect, you should upgrade to the latest version, as this may be contributing to your reporting problems.
Hi J,
Thank you for taking time in responding with my question.. I agree that in you don't need to get an internet connection to get the accuracy of the gps and it's more on getting the gps fix quicker.
Hi Ann,
I am not sure why that would be the case. When on-line, you can use wireless networks and A-GPS to get a fix quicker, however, I think the accuracy you get from off-line use of the tablet is good.In fact, I ran a test where I recorded tracks using a Samsung Galaxy III, a larger, non-brand smartphone and the tablet (no SIMS, so no data connectivity) and it turned out that the tablet was able to get a more accurate fix (I overlaid the resulting tracks over satellite imagery in the vicinity of my house) compared to the two other devices.
It actually seemed like the bigger the phone, the better the accuracy. Though this would of course only be the case if the producers decided to stick a bigger antenna in the device when room allowed. I only had three data points so I can't vouch for that to work accross the board.
Hope this helps!
jHi Everyone,
Does any have any experience in testing the GPS for Samsung tablet? I have read online that Samsung tab2 GPS is not accurate when it's offline but when you have internet connection it will be able to triangulate real time GPS. Could you please share your experience ? I am thinking of just getting a tablet with no mobile internet function .
Thank you!
--
--
Post: opend...@googlegroups.com
Unsubscribe: opendatakit...@googlegroups.com
Options: http://groups.google.com/group/opendatakit?hl=en
You received this message because you are subscribed to the Google Groups "ODK Community" group.
To unsubscribe from this group and stop receiving emails from it, send an email to opendatakit...@googlegroups.com.
For more options, visit https://groups.google.com/groups/opt_out.
--
--
Post: opend...@googlegroups.com
Unsubscribe: opendatakit...@googlegroups.com
Options: http://groups.google.com/group/opendatakit?hl=en
You received this message because you are subscribed to the Google Groups "ODK Community" group.
To unsubscribe from this group and stop receiving emails from it, send an email to opendatakit...@googlegroups.com.
For more options, visit https://groups.google.com/groups/opt_out.
--
Mitch Sundt
Software Engineer
University of Washington
mitche...@gmail.com
Hi Ma'am Mitch,
I want to open a question to you, I don't know if its the right place for me to ask you and don't know if my question is stupid enough for me to not to know the answer on my own. Anyways, I have read that we can use GPS offline in our android phone, is it true? i believed its true so i tried it and wait for almost half day but still the gps location is not recorded, please refer to the attached photo. Im using samsung mega.
It looks like it should work.
In general, GPS only works outside -- it will NOT work inside a concrete
building.
You may need to enable GPS on your device.
To test this out, download a GPS status app. I really like:
This will display the status of the GPS processing system's detection of
different satellites and their signal strengths.
On Friday, September 13, 2013 at 4:05:11 AM UTC+8, Mitch Sundt wrote:
Note that there was a change in ODK Collect 1.3 rev 1025 so that it now
discards the first GPS location returned by the Android OS. Reports from
the field noted that under some rare conditions, a very stale GPS
coordinate was being returned with an incorrectly fine accuracy estimate.If you have an older version of ODK Collect, you should upgrade to the
latest version, as this may be contributing to your reporting problems.On Tue, Sep 10, 2013 at 10:14 AM, AnnM annm...@gmail.com wrote:
Hi J,
Thank you for taking time in responding with my question.. I agree that
in you don't need to get an internet connection to get the accuracy of the
gps and it's more on getting the gps fix quicker.On Thursday, September 5, 2013 12:15:46 AM UTC+8, Jitka Hiscox wrote:
Hi Ann,
I am not sure why that would be the case. When on-line, you can use
wireless networks and A-GPS to get a fix quicker, however, I think the
accuracy you get from off-line use of the tablet is good.In fact, I ran a test where I recorded tracks using a Samsung Galaxy
III, a larger, non-brand smartphone and the tablet (no SIMS, so no data
connectivity) and it turned out that the tablet was able to get a more
accurate fix (I overlaid the resulting tracks over satellite imagery in the
vicinity of my house) compared to the two other devices.It actually seemed like the bigger the phone, the better the accuracy.
Though this would of course only be the case if the producers decided to
stick a bigger antenna in the device when room allowed. I only had three
data points so I can't vouch for that to work accross the board.Hope this helps!
jOn Wed, Sep 4, 2013 at 8:36 AM, AnnM annm...@gmail.com wrote:
Hi Everyone,
Does any have any experience in testing the GPS for Samsung tablet? I
have read online that Samsung tab2 GPS is not accurate when it's offline
but when you have internet connection it will be able to triangulate real
time GPS. Could you please share your experience ? I am thinking of just
getting a tablet with no mobile internet function .Thank you!
--
--
Post: opend...@googlegroups.com
Unsubscribe: opendatakit...@googlegroups.com
Options: http://groups.google.com/group/opendatakit?hl=en
You received this message because you are subscribed to the Google
Groups "ODK Community" group.To unsubscribe from this group and stop receiving emails from it, send
an email to opendatakit...@googlegroups.com.For more options, visit https://groups.google.com/groups/opt_out.
--
--
Post: opend...@googlegroups.com
Unsubscribe: opendatakit...@googlegroups.com
Options: http://groups.google.com/group/opendatakit?hl=en
You received this message because you are subscribed to the Google
Groups "ODK Community" group.To unsubscribe from this group and stop receiving emails from it, send
an email to opendatakit...@googlegroups.com.For more options, visit https://groups.google.com/groups/opt_out.
--
Mitch Sundt
Software Engineer
University of Washington
mitche...@gmail.comHi Ma'am Mitch,
I want to open a question to you, I don't know if its the right place for
me to ask you and don't know if my question is stupid enough for me to not
to know the answer on my own. Anyways, I have read that we can use GPS
offline in our android phone, is it true? i believed its true so i tried it
and wait for almost half day but still the gps location is not recorded,
please refer to the attached photo. Im using samsung mega.--
Post: opendatakit@googlegroups.com
Unsubscribe: opendatakit+unsubscribe@googlegroups.com
Options: http://groups.google.com/group/opendatakit?hl=en
You received this message because you are subscribed to the Google Groups
"ODK Community" group.
To unsubscribe from this group and stop receiving emails from it, send an
email to opendatakit+unsubscribe@googlegroups.com.
For more options, visit https://groups.google.com/d/optout.
--
Mitch Sundt
Software Engineer
University of Washington
mitchellsundt@gmail.com
Further to prev post we set our phones to GPS Only, rather than High Accuracy. Including WIFI signals and Cell masts compromises accuracy. This in South Africa.
Hi Ma'am,
Finally, I already made through it. Thank you so much for your help. Very
much appreciated.
Best regards,
Nilrey
It looks like it should work.
In general, GPS only works outside -- it will NOT work inside a concrete
building.You may need to enable GPS on your device.
- Open your device's Settings
- Choose "Location" under the "PERSONAL" heading
- Choose "Mode"
- And select "High Accuracy" to enable GPS satellite detection.
To test this out, download a GPS status app. I really like:
https://play.google.com/store/apps/details?id=com.eclipsim.gpsstatus2
This will display the status of the GPS processing system's detection of
different satellites and their signal strengths.On Sat, Mar 21, 2015 at 11:24 PM, nilrey@adra.ph wrote:
On Friday, September 13, 2013 at 4:05:11 AM UTC+8, Mitch Sundt wrote:
Note that there was a change in ODK Collect 1.3 rev 1025 so that it now
discards the first GPS location returned by the Android OS. Reports from
the field noted that under some rare conditions, a very stale GPS
coordinate was being returned with an incorrectly fine accuracy estimate.If you have an older version of ODK Collect, you should upgrade to the
latest version, as this may be contributing to your reporting problems.On Tue, Sep 10, 2013 at 10:14 AM, AnnM annm...@gmail.com wrote:
Hi J,
Thank you for taking time in responding with my question.. I agree
that in you don't need to get an internet connection to get the accuracy of
the gps and it's more on getting the gps fix quicker.On Thursday, September 5, 2013 12:15:46 AM UTC+8, Jitka Hiscox wrote:
Hi Ann,
I am not sure why that would be the case. When on-line, you can use
wireless networks and A-GPS to get a fix quicker, however, I think the
accuracy you get from off-line use of the tablet is good.In fact, I ran a test where I recorded tracks using a Samsung Galaxy
III, a larger, non-brand smartphone and the tablet (no SIMS, so no data
connectivity) and it turned out that the tablet was able to get a more
accurate fix (I overlaid the resulting tracks over satellite imagery in the
vicinity of my house) compared to the two other devices.It actually seemed like the bigger the phone, the better the accuracy.
Though this would of course only be the case if the producers decided to
stick a bigger antenna in the device when room allowed. I only had three
data points so I can't vouch for that to work accross the board.Hope this helps!
jOn Wed, Sep 4, 2013 at 8:36 AM, AnnM annm...@gmail.com wrote:
Hi Everyone,
Does any have any experience in testing the GPS for Samsung tablet? I
have read online that Samsung tab2 GPS is not accurate when it's offline
but when you have internet connection it will be able to triangulate real
time GPS. Could you please share your experience ? I am thinking of just
getting a tablet with no mobile internet function .Thank you!
--
--
Post: opend...@googlegroups.com
Unsubscribe: opendatakit...@googlegroups.com
Options: http://groups.google.com/group/opendatakit?hl=en
You received this message because you are subscribed to the Google
Groups "ODK Community" group.To unsubscribe from this group and stop receiving emails from it, send
an email to opendatakit...@googlegroups.com.For more options, visit https://groups.google.com/groups/opt_out.
--
--
Post: opend...@googlegroups.com
Unsubscribe: opendatakit...@googlegroups.com
Options: http://groups.google.com/group/opendatakit?hl=en
You received this message because you are subscribed to the Google
Groups "ODK Community" group.To unsubscribe from this group and stop receiving emails from it, send
an email to opendatakit...@googlegroups.com.For more options, visit https://groups.google.com/groups/opt_out.
--
Mitch Sundt
Software Engineer
University of Washington
mitche...@gmail.comHi Ma'am Mitch,
I want to open a question to you, I don't know if its the right place for
me to ask you and don't know if my question is stupid enough for me to not
to know the answer on my own. Anyways, I have read that we can use GPS
offline in our android phone, is it true? i believed its true so i tried it
and wait for almost half day but still the gps location is not recorded,
please refer to the attached photo. Im using samsung mega.--
Post: opendatakit@googlegroups.com
Unsubscribe: opendatakit+unsubscribe@googlegroups.com
Options: http://groups.google.com/group/opendatakit?hl=en
You received this message because you are subscribed to the Google Groups
"ODK Community" group.
To unsubscribe from this group and stop receiving emails from it, send an
email to opendatakit+unsubscribe@googlegroups.com.
For more options, visit https://groups.google.com/d/optout.--
Mitch Sundt
Software Engineer
University of Washington
mitchellsundt@gmail.com--
Post: opendatakit@googlegroups.com
Unsubscribe: opendatakit+unsubscribe@googlegroups.com
Options: http://groups.google.com/group/opendatakit?hl=en
You received this message because you are subscribed to a topic in the
Google Groups "ODK Community" group.
To unsubscribe from this topic, visit
https://groups.google.com/d/topic/opendatakit/mYglF86Ejj4/unsubscribe.
To unsubscribe from this group and all its topics, send an email to
opendatakit+unsubscribe@googlegroups.com.
For more options, visit https://groups.google.com/d/optout.
I think it is the opposite. Cell Masts and Wi-Fi Signals increase accuracy as the coverage of satellites over Africa is less than in the more developed countries
Regards,
Alex
Further to prev post we set our phones to GPS Only, rather than High Accuracy. Including WIFI signals and Cell masts compromises accuracy. This in South Africa.
Post: opendatakit@googlegroups.com
Unsubscribe: opendatakit+unsubscribe@googlegroups.com
Options: http://groups.google.com/group/opendatakit?hl=en
You received this message because you are subscribed to the Google Groups "ODK Community" group.
To unsubscribe from this group and stop receiving emails from it, send an email to opendatakit+unsubscribe@googlegroups.com.
For more options, visit https://groups.google.com/d/optout.
Hi Alex,
Fiona is correct.
In high-density developed urban environments (thus lots of Wi-Fi
access points) with lots of cover (e.g., very tall buildings or from
indoors), cell towers and access points help you get some location
data when you don't have a clear view of the sky.
This location data is not always accurate, but it's very quick to get
a fix and good enough for most applications. And unlike true GPS, it
doesn't burn a lot of battery. If you have a partial view of the sky,
Wi-Fi and cell towers can also help your get a faster but less
accurate location fix, again without burning battery.
In rural environments, there aren't enough Wi-Fi access points or cell
towers to provide useful location data. In some cases, the coverage is
so sparse that you'll get very wrong location data (e.g., sometimes
off by thousands of miles).
So, if you are collecting data in rural Uganda, it's best to use true
GPS. If you are collecting data in urban New York City, then using
Wi-Fi in addition to true GPS will let you get faster location locks.
As far as I know, there are only 32 GPS satellites and I don't think
they bias for developed countries. You can see a coverage map at
https://in-the-sky.org/satmap.php.
In a related note, Gaetano Borriello, ODK's founder also founded the
research lab (Intel Research in Seattle) that did a lot of the work on
using Wi-Fi to enhance location sensing indoors and under heavy cover
in cities. Those ideas are implemented on pretty much every smartphone
in the world...
Yaw
On Wed, Mar 25, 2015 at 11:20 AM, Alex Watila awatila@gmail.com wrote:
I think it is the opposite. Cell Masts and Wi-Fi Signals increase accuracy as the coverage of satellites over Africa is less than in the more developed countries
Regards,
Alex
-----Original Message-----
From: opendatakit@googlegroups.com [mailto:opendatakit@googlegroups.com] On Behalf Of berensford@gmail.com
Sent: Wednesday, March 25, 2015 3:46 AM
To: opendatakit@googlegroups.com
Subject: Re: [ODK Community] GPS accuracy for Samsung tablet offline or with internet connectionFurther to prev post we set our phones to GPS Only, rather than High Accuracy. Including WIFI signals and Cell masts compromises accuracy. This in South Africa.
--
Post: opendatakit@googlegroups.com
Unsubscribe: opendatakit+unsubscribe@googlegroups.com
Options: http://groups.google.com/group/opendatakit?hl=en
You received this message because you are subscribed to the Google Groups "ODK Community" group.
To unsubscribe from this group and stop receiving emails from it, send an email to opendatakit+unsubscribe@googlegroups.com.
For more options, visit https://groups.google.com/d/optout.--
Post: opendatakit@googlegroups.com
Unsubscribe: opendatakit+unsubscribe@googlegroups.com
Options: http://groups.google.com/group/opendatakit?hl=en
You received this message because you are subscribed to the Google Groups "ODK Community" group.
To unsubscribe from this group and stop receiving emails from it, send an email to opendatakit+unsubscribe@googlegroups.com.
For more options, visit https://groups.google.com/d/optout.
