Pontcysyllte Basin and Aqueduct, Llangollen Canal.

Although lime-based mortars have been around since Roman Times, the invention of Portland Cement and the introduction of Concrete as a building material date from the early 20th century.

The Industrial Revolution therefore relied on pre-concrete solutions as demonstrated by the Pontcysyllte Aqueduct  on the Llangollen Canal in North Wales, The 18-arched stone and cast iron structure was completed in 1805 and is now the oldest and longest (308m) navigable aqueduct in the UK, and at 38m the highest in the world.

Designed by Thomas Telford is consists of a narrow iron bath, with no parapet. The total width is 3.7m, which includes towpath,

so the narrowness accentuates the height and wonder of this river in the sky.

Whilst concrete revolutionised civil engineering, many wonders were possible pre its use as the primary building material. Pontcysyllte Aqueduct is a UNESCO World Heritage Site.

Europe / UK-Wales

Lat: 52° 58' 18.9" N
Long: 4° 6' 14.156" W

→ maps.google.com [EXT]

Precision is: High. Pinpoints the exact spot.

4 GoPro HERO2 cameras, with a wooden camera cradle/rig to hold the cameras in exactly the correct position is triggered by 4
[url="http://www.gentles.ltd.uk/gentwire/hero.htm"]gentWIRE[/url] camera syncronisers. Suspended below a Dan Leigh Cruiser kite with 8ft/2.5m span.

This technique produces two hemispheres, and a different workflow in PTGui from the classic ground pano technique. This results in extra effort BUT impossible angles!

See the rig, how Kite Aerial Photography is achieved, and the workflow.