Gloucestershire and West Lothian Aerial Archaeology
Retired Research Radiation Biophysicist
Armadale (Scotland) &
I have been interested in photography since the 1950s. At around the age of eight, I remember contact printing negatives without chemicals using a day's exposure to sunlight. In the 1960s and early 70s (working with fully manual cameras) I enjoyed capturing night scenes, one of which won a national competition. The prize was an auto-exposure SLR, a technology that was not overly helpful for long exposures due to reciprocity failure. Wet streets following rainfall were often a key ingredient of the nightscapes, a consideration that would reappear for thermally imaging archaeological residues over 40 years later.
My training and profession have involved a range of image gathering techniques ( X-ray crystallography, photomicroscopy, corona discharge photography and autoradiography etc). Geophysical methods of archaeological investigation often involve logging soil resistance or magnetic data points, one at a time, which are used to form an array of 'pixels', which is then refined through appropriate processing to form an image. Both within and outwith the visible spectrum, imaging is mass data point collection and should be performed under optimal conditions (for the technique and site of choice) and the resulting images processed to extract the maximum amount of inherent information. Standard photographic visualisation is only a starting point.
John and the late Rosie Wells are the yellow dots (Cairnpapple 2011)
Rathrar, Rathbarna Quadrivalleted Enclosure Complex, Co. Roscommon, by SNAPS recipient Christy Lawless.
Family outing in a helicopter over our village, Bussage, Gloucestershire, in the 1980s.
Chichen Itza, another aerial image before we did kite aerial photography.
(Note the nostalgic scratch from the days of film)
Archeoscan Excavation of a
Roman building at Nesley Farm, Gloucestershire, in 2011.
John is on the right and
Rosie is out of shot flying the kite.
(click on image for larger version)
A section from one of six West Lothian Council display boards on our work.
West Lothian Aerial Archaeology
with Cade Wells
Cade is a Chartered Engineer with an MEng in
Computer Systems Engineering awarded by the University
of Bangor and a Doctorate (Image Processing and
Machine Vision SoC) awarded by the
universities of Edinburgh, Glasgow, Heriot Watt and
Strathclyde. Additionally, he has
a postgraduate certificate in business administration
(Edinburgh) and a graduate certificate in psychology
(BCU), along with training in digital forensics
elsewhere, including Shrivenham (Cranfield University).
to Right - Rosie, Cade and John Wells, Jim Knowles and
Heidi (Wells) Walker on Cairnpapple. Jim was the only
qualified archaeologist in the group. He also has an MSc
Kinneil Roman fortlet with excavation features on the extreme right (North) from ~30 year before.
inverted, near infrared kite aerial photo captured in
Gloucestershire Aerial Archaeology
with Heidi Walker
Heidi is a design manager who initially studied at the Stroud School of Art, with some time at The Slade, followed by degrees in illustration and design at the universities of The West of England and Brighton. Adobe Photoshop and Illustrator are areas of expertise.
east of Coaley: Google data, Houseprices Lidar Map and
the same emphasised
* Edge Detect > Difference of Gaussians > Auto Equalise > Auto Levels
Parch marks (left) at Gyde House,
Painswick, emphasised with GIMP by manipulating the
Way to Take Aerial Photos
Heidi in flight
The Simplest Approach to Aerial Thermography and Photography
GoPro type set-up and variant for a phone, with or without a Flir One thermal imager which must be secured, eg with PVC tape. The larger stick has lockable sections.
Heidi, John and Cade.