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Cellular forums Home > Archive > GPS > November 2005 > Garmin Ique and incorrect True Magnetic Calculation
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Garmin Ique and incorrect True Magnetic Calculation
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| Has anyone else noticed that the Garmin Ique 3600 is off by 2 degrees + when
giving true magentic directions? I have had two units and both have had the
same problem. Where I live when driving a N S road for example driving North
it gives me a reading of 359 degrees. All of my other 8 various GPS units
set to true magnetic N give the correct reading if 357. The 3600 reads high
by 2 degrees. Does not matter N S E W?
I have emailed Garmin numerous times, they said they would notify their tech
people. Could easily be fixed by a patch.
But I want to make sure other people have noticed that problem. Or, by the
rare chance only my Garmin Ique 3600's only had the problem. I have the
most current firmware and the unit is set to true not Cardinal.
Thanks,
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| Mike wrote:
> Has anyone else noticed that the Garmin Ique 3600 is off by 2 degrees + w=
hen
> giving true magentic directions?
Your nomenclature is confusing. The unit can be set to either 'True'
or to 'Magnetic'. In the first case north would be in the direction of
the north pole whereas in the second it would be in the direction of
the earth's magnetic field lines. But "true magnetic" is not an
option.
> I have had two units and both have had the
> same problem. Where I live when driving a N S road for example driving No=
rth
> it gives me a reading of 359 degrees.
Without knowing where you live or how the streets have been laid out in
that area it's hard to know what is correct. Usually streets are laid
out either based on true north or grid north.
..=2E.
> I have the
> most current firmware and the unit is set to true not Cardinal.
Directions can be given either in 'numeric' values, e.g. 45=B0, or as
'cardinal', e.g. NE. This is separate from whether the coordinates are
based on 'True' vs. 'Magnetic' north.
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| I have the Unit set to Magnetic not True and Degrees not Cardinal. I live
in West Central Iowa and driving on a North South straight road should give
me a reading of 357 Degrees due to declination.
All of my other GPS's are set the same way and reflect the 357 degrees, it's
only the Ique that show 359, they can seem to compute the correct
declination offset
-Thanks
"peter" <prathman@comcast.net> wrote in message
news:1132459830.004132.263810@g44g2000cwa.googlegroups.com...
Mike wrote:
> Has anyone else noticed that the Garmin Ique 3600 is off by 2 degrees +
> when
> giving true magentic directions?
Your nomenclature is confusing. The unit can be set to either 'True'
or to 'Magnetic'. In the first case north would be in the direction of
the north pole whereas in the second it would be in the direction of
the earth's magnetic field lines. But "true magnetic" is not an
option.
> I have had two units and both have had the
> same problem. Where I live when driving a N S road for example driving
> North
> it gives me a reading of 359 degrees.
Without knowing where you live or how the streets have been laid out in
that area it's hard to know what is correct. Usually streets are laid
out either based on true north or grid north.
....
> I have the
> most current firmware and the unit is set to true not Cardinal.
Directions can be given either in 'numeric' values, e.g. 45°, or as
'cardinal', e.g. NE. This is separate from whether the coordinates are
based on 'True' vs. 'Magnetic' north.
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| I made yet another typo, the last sentence should say that all of the other
GPS Units compute the correct Magnetic Declination offset correctly, The 2
Gamin Ique 3600 DO NOT.
Thanks Again
"Mike" < michaelthalman@sprin
tmail.com> wrote in message
news:DM9gf.350$A23.87@newsread2.news.pas.earthlink.net...
>I have the Unit set to Magnetic not True and Degrees not Cardinal. I live
>in West Central Iowa and driving on a North South straight road should give
>me a reading of 357 Degrees due to declination.
> All of my other GPS's are set the same way and reflect the 357 degrees,
> it's only the Ique that show 359, they can seem to compute the correct
> declination offset
>
>
>
> -Thanks
>
> "peter" <prathman@comcast.net> wrote in message
> news:1132459830.004132.263810@g44g2000cwa.googlegroups.com...
> Mike wrote:
>
> Your nomenclature is confusing. The unit can be set to either 'True'
> or to 'Magnetic'. In the first case north would be in the direction of
> the north pole whereas in the second it would be in the direction of
> the earth's magnetic field lines. But "true magnetic" is not an
> option.
>
>
> Without knowing where you live or how the streets have been laid out in
> that area it's hard to know what is correct. Usually streets are laid
> out either based on true north or grid north.
> ...
>
> Directions can be given either in 'numeric' values, e.g. 45°, or as
> 'cardinal', e.g. NE. This is separate from whether the coordinates are
> based on 'True' vs. 'Magnetic' north.
>
>
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| zulutime 2005-11-20, 11:48 pm |
|
Mike wrote:
> I have the Unit set to Magnetic not True and Degrees not Cardinal. I live
> in West Central Iowa and driving on a North South straight road should gi=
ve
> me a reading of 357 Degrees due to declination.
> All of my other GPS's are set the same way and reflect the 357 degrees, i=
t's
> only the Ique that show 359, they can seem to compute the correct
> declination offset
>
>
>
> -Thanks
>
> "peter" <prathman@comcast.net> wrote in message
> news:1132459830.004132.263810@g44g2000cwa.googlegroups.com...
> Mike wrote:
>
> Your nomenclature is confusing. The unit can be set to either 'True'
> or to 'Magnetic'. In the first case north would be in the direction of
> the north pole whereas in the second it would be in the direction of
> the earth's magnetic field lines. But "true magnetic" is not an
> option.
>
>
> Without knowing where you live or how the streets have been laid out in
> that area it's hard to know what is correct. Usually streets are laid
> out either based on true north or grid north.
> ...
>
> Directions can be given either in 'numeric' values, e.g. 45=B0, or as
> 'cardinal', e.g. NE. This is separate from whether the coordinates are
> based on 'True' vs. 'Magnetic' north.
If the iQue is significantly newer than your other GPSRs, then it
appears to correctly reflect the trend of declination.
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| zulutime wrote:
> Mike wrote:
[color=darkred]
> If the iQue is significantly newer than your other GPSRs, then it
> appears to correctly reflect the trend of declination.
Yes, depending on exactly where in 'West Central Iowa' Mike is located
the USGS seems to indicate that the declination should currently be
anywhere from about one to three degrees and decreasing at almost 7.5'
per year. Still not clear if the iQue or his other GPS receivers are
more nearly correct
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| Dominic Sexton 2005-11-21, 5:48 pm |
| In message <1132550028.801478.176810@o13g2000cwo.googlegroups.com>,
peter <prathman@comcast.net> writes
>zulutime wrote:
>
>
>Yes, depending on exactly where in 'West Central Iowa' Mike is located
>the USGS seems to indicate that the declination should currently be
>anywhere from about one to three degrees and decreasing at almost 7.5'
>per year. Still not clear if the iQue or his other GPS receivers are
>more nearly correct
>
Perhaps Mike should go to the USGS Geomagnetism page and find the actual
declination (online or with a downloadable program) to see what is the
real value where he is according to the latest model.
http://geomag.usgs.gov/models/
The online calculator requires the Java runtime environment. A magnetic
model must be selected to calculate the values. The international model
igrf-2005 appears to be the only model available that is not past its
use by date.
--
Dominic Sexton
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| Can someone else who has an IQUE 3600 and another Gps, run them side by side
and see if the 3600 gives them a 2 degree higher number in magnetic
direction traveling?
As I mentioned earlier where I live, a "straight N S road, driving North
should give me a reading of 357 degrees, and all of my other Gps units with
the exception of the the Ique 3600 gives me the 357 degrees. The Ique gives
me 359 Driving North and 179 driving south. The Iques are set to magnetic
and degrees. Magnetic Declination it should be 357 deg when driving North
and 177 while driving south.
Thanks,
"peter" <prathman@comcast.net> wrote in message
news:1132550028.801478.176810@o13g2000cwo.googlegroups.com...
> zulutime wrote:
>
>
> Yes, depending on exactly where in 'West Central Iowa' Mike is located
> the USGS seems to indicate that the declination should currently be
> anywhere from about one to three degrees and decreasing at almost 7.5'
> per year. Still not clear if the iQue or his other GPS receivers are
> more nearly correct
>
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