The barrow at Rootiagh, in the Smallcounty Barony, measures just 14.5 metres in diameter and sits so low in the drained agricultural land that it leaves almost no impression on the modern landscape. It does not appear on Ordnance Survey Ireland's historic maps at all, which means that for generations of cartographers and surveyors, it effectively did not exist.

The monument only entered the archaeological record in 1986, when the Bruff aerial photographic survey captured it from the air, logging it as a small circular earthwork under reference Bruff 157: AP 4/3635. Aerial survey of this kind works by reading the land from above, where subtle variations in soil and crop growth betray buried or levelled features that are otherwise invisible at ground level. A barrow is a burial mound, typically of prehistoric origin, and this one falls into that broad category of earthworks that have been gradually eroded by centuries of farming, drainage, and land improvement. Subsequent satellite imagery confirmed the site, with the faint circular cropmark visible on Ordnance Survey Ireland orthoimages taken between 2005 and 2012, on a Digital Globe image from 2011 to 2013, and again on Google Earth imagery captured on 20 September 2020. A related enclosure, a separate monument, lies roughly 285 metres to the south-southwest. The record was compiled by Alison McQueen and Vera Rahilly and uploaded in November 2020.

The site sits approximately 45 metres east of a land drain and around 200 metres north of the townland boundary with Ballyloundash. In practical terms, this is working farmland in private ownership, and there is nothing on the ground to mark the spot for a visitor. What makes it worth knowing about is less what you would see standing in the field and more what the aerial images reveal: that the Irish countryside, even in heavily farmed lowland areas, still holds buried traces of the people who shaped it long before the first map was drawn. The cropmark is most clearly visible during dry summers, when differential moisture in the soil causes crops or grass directly above buried features to grow or stress at a different rate to the surrounding ground, effectively printing a faint outline that only becomes legible from altitude.