Sorry all- try this link-
https://www.facebook.com/photo.php?fbid=10221429802727015&set=gm.3499791356777204&type=3
Sent from my iPhone
Begin forwarded message:
> From: Timothy Scarlett <[log in to unmask]>
> Date: December 6, 2020 at 1:20:17 PM EST
> To: histarch administration <[log in to unmask]>
> Subject: history of aerial survey
>
>
> Hi all,
>
> I’m looking for comparative information about structures like these:
> file:///Users/scarlett/Desktop/129293577_10221429802767016_5288243268648673110_n.jpg
>
> This image shows a steel frame that I think held an "above the ground" target for aerial photography and survey. I can’t find any other examples of this type of artifact using google image searches— plenty of examples of control point targets for aerial survey, but no discussion of historic methods. A couple of these are scattered around in the woods here.
>
> Anybody know any examples?
>
> Thanks
> Tim Scarlett
> Michigan Tech
>
> Photo shared publicly by Kirstin Knaup Hensley. I will follow up with her if anyone sends more information.
>
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