Hi everyone,
How good is a cell phone compass? I mean, if I have no metal nearby and
I have the phone set to show True North, what kind of accuracy can I
expect if I lay my phone flat and use the compass app?
I'm working on a vertical west sundial for a community garden (a.k.a
allotment) and have a deadline of end of September to get it installed,
because the aim is to unveil it at the group's annual meeting.
The dial is to be installed on two posts. I want to get the posts lined
up as close to north-south as I can, to make aligning the dial easier. I
will use adjustable bolts to fix the dial to the posts, so can I
compensate for the line between them being a couple of degrees off - but
no more than that.
I already have one post installed and concreted in place. I had hoped to
use the sun's meridian shadow cast by it to give me a precise line N-S
for placing the second post. Unfortunately, rain has set in here and it
looks as if there will not be a sunny day for at least a week. I don't
think I can wait that long to get the second post installed; otherwise
I'll be short of time for the other remaining tasks. Hence my interest
in using my phone compass for alignment.
Cheers,
Steve
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