Q&A #192

Teachers' Lounge Discussion: Photography and math

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From: Michael Wathen <michael.wathen@mathteachtech.com>
To: Teacher2Teacher Public Discussion
Date: 2002030523:32:47
Subject: Re: Aerial Photography and Proportional Reasoning

I forgot to mention what is probably the most important part of using
proportions and photgraphs.  You can alway analyze the pixel
dimensions in a photograph by saving the picture, then opening  it
with Microsoft Paint.  The coordinates are given in the bottom right
hand side for any pixel. Using the example below, save the Cincinnati
picture. Open the picture in Paint. To determine the pixel length to
the runway you will need to apply the distance formula from one end of
the runway to the other. 

On 2002030413:35:41, Michael Wathen wrote:
>I use internet photos regularly in my class room to provide a rich
>understanding of proportion.  Here's and example, below is a photo
>(high altitude)of my home town. 

>Can you figure out the distance on the ground from the left side of
>the picture to the right side?  What could give you the clue?  The
>runway in the picture is about 10,000 feet long?
>Was this picture taken from a satellite or from a high altitude
>Can you figure out the height from the ground?  Assume the camera is
>35 mm lense with a 50mm focal length.
>Michael Wathen

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