You can find free aerial imagery on the USGS’s earthexplorer.usgs.gov/ <http://earthexplorer.usgs.gov/>. If you are lucky on occasion there’s imagery from the 1940s but usually what is available on this website (at least for Michigan) starts in the 1950s. Archaeologists in Ohio have been using Google Earth to identify previously unrecorded mounds and earthworks, so the imagery does not necessarily have to be too old to be helpful.
Misty
Misty Jackson, Ph.D., RPA 16457
Arbre Croche Cultural Resources LLC
214 South Main Street
Leslie, Michigan 49251
www.arbrecroche.com
517-525-3060
Center for Maritime and
Underwater Resource Management
www.cmurm.org
Arbre Croche Cultural Resources LLC is a certified Economically Disadvantaged Woman-Owned Small Business (EDWOSB)
Don't be seduced into thinking that that which does not make a profit is without value. -Arthur Miller, playwright and essayist (17 Oct 1915-2005)
> On Aug 12, 2020, at 1:35 PM, Susan Wlater <[log in to unmask]> wrote:
>
> San Diego County aerial photos are fabulous. Besides historic sites/features, they often show out of place plantings and contours that don't jibe with natural formations. I highly recommend you use yours.
> S. Walter
>
> -----Original Message----- From: LINDA K DERRY
> Sent: Wednesday, August 12, 2020 9:44 AM
> To: [log in to unmask]
> Subject: Re: Old Aerial Photo's worth looking?
>
> Kris R. Oswald,
>
> I have used old aerial photographs quite a bit and found them useful. My
> source was the local or regional offices of the Natural Resource
> Conservation Service - who used to be known as the Soil Conservation
> Service. They apparently have been taking aerial photographs for nearly
> a century as a way to document land use and their farmland programs (the
> earliest in our area is 1937). These photos are especially helpful for
> my area because lots and lots of farm fields are now planted in timber or
> the woods was allowed to reclaim after the fields were abandoned. (and
> since I'm dealing with antebellum sites, it helps me even more because
> settlement patterns have changed, many roads have been abandoned, and
> many structures have rotted away and graveyards have been left untended.)
>
> However, I found that many archaeological sites were located on a sandy
> ridge in the floodplain, which in the 20th century, was placed in "set back
> cotton," - meaning it was a high dry ridge that was not plowed or
> planted. So, it is very hard to spot the archaeological sites there in
> the aerial photos. I guess people want their habitation sites on the high
> dry land, whereas the farmers wanted the less dry land for their cotton and
> other crops.
>
> Linda Derry
> Site Director, Old Cahawba Archaeological Park
> Alabama Historical Commission
> 9518 Cahaba Road, Orrville, AL 36767
> park: 334/ 875-2529
> [log in to unmask]
>
>
> On Wed, Aug 12, 2020 at 10:30 AM <[log in to unmask]> wrote:
>
>> Hello all,
>> I just got word of a site that offers a series of dated Aerial photos.
>> I am working a late fur trade site so I purchased one ,in hopes of
>> picking out old features
>> that are documented in the historical record .
>> has any one used this type of imagry with success?
>> I have no access to Lidar scan im my budget.
>> Just putting this out for opinions on the subject.
>> Thank you
>> Kris R. Oswald
>>
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