Hi again,
A big 'thank you' to everyone who replied to my inquiry about phone
compasses and the setting in place of two posts. Responses are
summarized below.
- A couple of people suggested that I should use specialist equipment
such as theodolites or astrocompasses. Unfortunately, I
I use the app "GPS status" which has a calibration unction for the
compass. After calibration the compass is pretty good
At 21:58 11-9-2018, Steve Lelievre wrote:
On 2018-09-11 12:49 PM, Richard Langley wrote:
There must be some specs somewhere on the Web.
Unfortunately, the only spec I've
Steve,
Why not use a magnetic compass and correct for magnetic declination? The
magnetic declination for the location of your sundial can be found here:
http://www.magnetic-declination.com/ .
Don S
On 9/11/2018 2:38 PM, Steve Lelievre wrote:
Hi everyone,
How good is a cell phone
Hi Steve,
My experience with the cell phone compass in a Moto G Android is poor. As Dan
noted it can be off by 15 to 20 degrees. The apps are good showing both
magnetic and compass direction and strength. But the magnetic sensors in the
chip are poor even with the calibration rotations done.
On 2018-09-11 12:49 PM, Richard Langley wrote:
There must be some specs somewhere on the Web.
Unfortunately, the only spec I've found just says the phone has an
electronic compass - no accuracy stated.
Chat on discussion lists seems to a bit scathing but most relates to
older phones.
I would try to use a theodolite. If you center it on the first point and
know the azimuth to a distant reference, I guess you can determine where
the second post needs to be.
Dan Uza
On Tue, Sep 11, 2018 at 10:48 PM Dan-George Uza
wrote:
> In my experience, cellphone compasses are completely
/ |
-
From: sundial on behalf of Richard Langley
Sent: September 11, 2018 4:49 PM
To: Steve Lelievre; Sundial List
Subject: Re: How good is a cell phone compass
Hi Steve:
My iPhone compass app is indicating N correctly to within 1° right now with the
phone sitting on the dining
Hi Steve:
My iPhone compass app is indicating N correctly to within 1° right now with the
phone sitting on the dining room table in a wood-frame house. Calibration not
performed recently. Fortuitous? There must be some specs somewhere on the Web.
-- Richard
In my experience, cellphone compasses are completely unreliable for
dialling. Some are off by more than 20 degrees. You can quickly check the
accuracy on Google Maps: the narrower the blue cone is, the more accurate
results will be.
Dan Uza
On Tue, Sep 11, 2018 at 10:39 PM Steve Lelievre <
