I work in Fairfax County, Virginia. In 2003, we got the 1937 and 1954
historic aerial photographs from the National Archives, digitized them,
orthorectified them, and put them into GIS. The County has a series of
more modern aerial photographs, as well. You may find that the county or
state that you are working in may have them or you could reach out to
National Archives to see if they have aerial photographs available for your
area.
We use the historic aerial photographs all the time to see changes that
have occurred as a result of urbanization and suburbanization. We also have
been able to identify sites in areas that were previously agricultural.
Liz Crowell
Fairfax County Park Authority
Archaeology and Collections Branch Manager
On Wed, Aug 12, 2020 at 9:54 PM David Babson <[log in to unmask]> wrote:
> Can endorse this approach. Three years ago, we found LIDAR images of an c.
> 1820 dry dock site on the Erie Canal from a 2010 general survey of New York
> State that was available online from the New York State Archives.
> Boundaries, shape and location of the dry dock basin in the LIDAR image
> agreed very closely with what was, effectively, one of a series of "as
> built" maps of the Canal from 1834, also from the NYS Archives. This
> allowed us to locate surface features (principally, the slumped and
> partly-filled dock basin) in a heavily-wooded area. Very useful and
> effective survey method.
>
> David Babson.
>
>
> On Wed, Aug 12, 2020, 1:02 PM Kate Johnson <[log in to unmask]
> wrote:
>
> > Hi Kris,
> >
> > Depending on the location and years you are interested in, many state GIS
> > or library sites offer free aerial imagery that is usually available for
> > download and use in GIS software. For example, in Connecticut, black and
> > white aerial imagery is available for 1934 and is very high resolution:
> > http://magic.lib.uconn.edu/mash_up/aerial_index.html
> >
> > Many states now also offer LiDAR and derivatives such as digital
> elevation
> > models (DEMs) that are often free and downloadable as well. Here is an
> > example also from Connecticut:
> > http://www.cteco.uconn.edu/data/lidar/index.htm
> >
> > So depending on where you are working, I'd suggest seeing if such sites
> are
> > available to you.
> >
> > Hope that helps,
> > Kate
> >
> >
> > On Wed, Aug 12, 2020 at 11:30 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
> > >
> > > WILLIAMS INTERNATIONAL THE POWER OF
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> On Aug 12, 2020 1:02 PM, "Kate Johnson" <[log in to unmask]> wrote:
>
> Hi Kris,
>
> Depending on the location and years you are interested in, many state GIS
> or library sites offer free aerial imagery that is usually available for
> download and use in GIS software. For example, in Connecticut, black and
> white aerial imagery is available for 1934 and is very high resolution:
> http://magic.lib.uconn.edu/mash_up/aerial_index.html
>
> Many states now also offer LiDAR and derivatives such as digital elevation
> models (DEMs) that are often free and downloadable as well. Here is an
> example also from Connecticut:
> http://www.cteco.uconn.edu/data/lidar/index.htm
>
> So depending on where you are working, I'd suggest seeing if such sites are
> available to you.
>
> Hope that helps,
> Kate
>
>
>
> On Wed, Aug 12, 2020 at 11:30 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
> >
> > WILLIAMS INTERNATIONAL THE POWER OF
> VISION
> >
> > This email message and any attachment(s) are for the sole use of the
> > intended
> > recipient(s) and may contain proprietary and/or confidential and/or
> export
> > controlled
> > information which may be privileged or otherwise protected from
> disclosure.
> >
> > Any unauthorized review, use, disclosure or distribution is prohibited.
> If
> > you are
> > not the intended recipient(s), please contact [log in to unmask] and
> > destroy
> > the original message and any copies of the message as well as any
> > attachment(s)
> > to the original message.
> >
> > This email message does not form a binding contract or contract amendment
> > with
> > the sender, unless it clearly states in writing that it is a contract or
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