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    Re: Hand bearing compass as iPhone app?
    From: Philip Bailey
    Date: 2012 Mar 6, 21:13 +0000

    [I sent an initial reply which hasn't turned up yet.  If it does, here are my 
    more considered comments, anyway.]
    
    I have an app called Spyglass on my iPhone which seems to meet all your 
    requirements.  It shows a zoomable image of what the iPhone's camera 
    currently sees, with a reticule superimposed over that showing azimuth and 
    elevation.  It shows the position of the sun, moon and other obvious 
    celestial bodies.  Other information, including the time and your GPS 
    position is also shown.  You can save bearings to several objects, marked on 
    screen even as you turn to face elsewhere.  You can also save what you are 
    seeing (the camera image and all the superimposed information) as a 
    photograph.  There are other features, including apparently the ability to 
    measure the (linear) distance between remote objects, although I haven't 
    figured out quite how to do that with the app.
    
    Recommended.
    
    
    Phil
    
    
    On 6 Mar 2012, at 20:15, Lu Abel wrote:
    
    > iPhones have some very accurate sensors built in -- not only GPS but a compass and an inclinometer.
    > 
    > The basic compass that comes with the iPhone is pretty neat, but I'm 
    wondering if there is an app that is specifically designed as a hand bearing 
    compass, ie, an app where you can aim your iPhone at a distant object (the 
    app would likely have to give something like a sight vane) and it would give 
    the bearing to the object (with, perhaps, the ability to freeze the bearing 
    so you can move the iPhone to read the bearing without having it change)
    
    
    
    
    

       
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