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    Re: Dip-meter again
    From: Richard B. Langley
    Date: 2013 Apr 10, 14:32 -0300

    Depending on how you use it, Google Earth images might not give results better 
    than 1 metre but that might be sufficient. I used a Google Earth image to 
    measure the distance between (the centres of) two GNSS antennas on the roof 
    of Head Hall. The GNSS-determined baseline length is 19.010 metres. An 
    initial determination using the Google Earth image gave 19.49 metres. Zooming 
    OUT and remeasuring gave 19.18 metres.
    -- Richard Langley
    On 2013-04-10, at 2:10 PM, Bruce J. Pennino wrote:
    > Absolutely brilliant and simple! Why didn't I think of that? I scale 
    distances frequently from online maps/charts. Just yesterday I had to do a 
    quicky estimate for an elevated "high line" of bridges and walkways. I 
    measured 200 ft with a tape, and the guesstimated the length would be 1200 
    ft. I'm going to go back to the site with my tape. Measure it more accurately 
    and compare it to Google earth. Your idea also offers a simple way to check 
    other measurements. I like it.
    > Bruce
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    | Richard B. Langley                            E-mail: lang@unb.ca         |
    | Geodetic Research Laboratory                  Web: http://www.unb.ca/GGE/ |
    | Dept. of Geodesy and Geomatics Engineering    Phone:    +1 506 453-5142   |
    | University of New Brunswick                   Fax:      +1 506 453-4943   |
    | Fredericton, N.B., Canada  E3B 5A3                                        |
    |        Fredericton?  Where's that?  See: http://www.fredericton.ca/       |

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