Recent Surveys

Neath Castle

Neath Castle (c) Black Mountains Archaeology
Neath Castle (c) Black Mountains Archaeology

We were asked by Neath Town Council through their agents Hurley & Davies to carry out a building record of a partially collapsing Post-medieval wall located perpendicular to the north curtain wall of Neath Castle. We created a 3D photogrammetric model of the collapsing wall and then carried out an archaeological watching brief during the renovation of the wall. During the course of the watching brief part of the medieval NE Tower was discovered hidden behind the partially collapsing Post-medieval wall.

The detailed 3D model of the Post-medieval wall before renovation can be viewed here https://p3d.in/f380u.

Scaffolding supporting the wall was removed in the point cloud to gain a better view of the wall and its phasing. Some ‘ghosting’ of the removed scaffolding can be seen in the 3D mesh. The dense point cloud generated over 55 million points with a mean RMS error of 0.012m. Five GCPs were used and surveyed with an EMLID Reach GN55/ Glonass (GPS) Receiver and data logger with a sub-20mm error margin to OSGB36 (National Grid). The Ground Sampling Distance achieved a great 0.31cm/pixel.

Part of the medieval NE Tower was discovered hidden behind the partially collapsing Post-medieval wall. We created a detailed 3D photogrammetric model of the medieval discovery, which can be viewed here https://p3d.in/dw4It. The dense point cloud generated over 15 million points with a mean RMS error of 0.006m. The Ground Sampling Distance (GSD) achieved was a great 0.301cm/pixel.

Special thanks to Cadw, Neath Town Council, Hurley & Davies and Taliesin Conservation.

St George’s University Hospital NHS Foundation Trust, London

St George’s Hospital (c) Black Mountains Archaeology

Together with ArchaeoDomus we were recently asked by iDEA LTD to produce a high resolution 3D photogrammetric survey of St George’s University Hospital NHS Foundation Trust. The project was particularly challenging given the survey area extended to 96 acres over one of the busiest hospitals in the UK. The 3D model we produced had a dense point cloud of over 151 million points and a fantastic Ground Sampling Distance of 1.7cm. Five GCPs were used and surveyed with an EMLID Reach GN55/ Glonass (GPS) Receiver and data logger with a sub-20mm error margin to OSGB36 (National Grid).

Usk Castle, Monmouthshire

We recently recorded the Outer Curtain Wall, Dovecote and South Towers at Usk Castle. Both terrestrial and aerial cameras were used including three drone flights. The dense point cloud generated over 50 million points with a mean RMS error of 0.016m. Seven GCPs were used and surveyed with an EMLID Reach GN55/ Glonass (GPS) Receiver and data logger with a sub-20mm error margin to OSGB36 (National Grid). The Ground Sampling Distance (GSD) achieved was a great 0.316cm/pixel. Outputs include a 3D point cloud and mesh, high resolution orthomosaic and animation.

Usk Castle, Monmouthshire
Aerial view of Usk Castle, Monmouthshire
Usk Castle 3D model
Usk Castle 3D model

Hafod-Morfa Copperworks, Swansea

We are currently working at the incredible Hafod-Morfa Copperworks, Swansea. We are excavating part of the site in advance of the refurbishment of the former Morfa Powerhouse and later Yorkshire Imperial Metals canteen (LB 11691) building into a distillery and visitor centre by Penderyn Whisky (our favourite whiskey!). We have undertaken comprehensive surveys of the site including centimetre accurate 3D models. You can view a 3D model below of the recently excavated bathhouse at the Hafod-Morfa Copperworks together with other 3D surveys on the site here and below.

Bath House
Hafod-Morfa Copperworks, Swansea – bath house 3D model

Fly through animation of the Powerhouse and Foundry, Hafod-Morfa Copperworks.

Prehistoric funerary site near Llanmaes, Vale of Glamorgan

In 2019 we investigated a major Bronze Age burial site, the ploughed out remains of a large (c40m diameter) earthen round barrow similar to those known at Sutton (GGAT HER 00285s), Sheeplays (GGAT HER 00287s and 00288s) and Six Wells (GGAT HER 00289s and 00290s) a few miles to the north. At least three satellite cairns (carbon dated to Middle Bronze Age) were placed around the round barrow and a large cremation cemetery was found to the south west of the round barrow containing over 50 cremations. A possible Bronze Age field system was discovered, identified by four sets of double post-holes and two single post-holes. An Early-medieval corn (grain) drying oven was recorded and radiocarbon dated to 660-770 cal AD. The oven was recorded using terrestrial photography to create a 3D photogrammetric record of the discovery. You can view the corn drying oven 3D model below.

Corn Drying Oven
Prehistoric Corn-drying Oven

Milfraen Colliery, Torfaen

Milfraen Colliery (NPRN91596) and Cottages (NPRN67584) landscape survey. The former colliery lies within the Blaenavon World Heritage Site.

Milfraen Colliery
Milfraen Colliery NPRN91596 and Cottages NPRN67584 aerial photography

Milfraen Colliery was opened in around 1834 and a new shaft was sunk in 1865 by John Jayne (Jayne & Co.). It was taken over by the Blaenavon Iron & Steel Co in 1884 and the last coal lifted in 1933 when it was then primarily used as a ventilation shaft. The colliery finally closed in 1950. On the 4th March 1902 five men fell to their deaths in a lift shaft accident and later on 10th July 1929 nine men lost their lives in a below ground gas explosion.

1910 milfraen colliery
Milfraen Colliery 1910

 

%d bloggers like this: