At Rochestown in County Limerick, a substantial area of improved pasture gives almost nothing away at ground level, yet aerial photography from the 1960s reveals the ghostly outline of what appears to be an organised field system, laid out across a roughly sub-rectangular block of land measuring around 450 metres east-northeast to west-southwest and some 650 metres north-northwest to south-southeast. Walk the ground today and you would notice, at most, some slight undulations near the eastern field boundary, with no clear pattern to guide interpretation. The landscape has been smoothed over, its former geometry absorbed into ordinary farmland.

The evidence for the field system comes from the St Joseph Collection of aerial photographs, specifically frames catalogued as AVT5 and AVT9, shot during the 1960s. This collection, taken from the air over many parts of Ireland, has been instrumental in identifying archaeological features that farming and land improvement have since erased or obscured at surface level. At Rochestown, whoever compiled the record noted that a curvilinear area of coppice woodland shown on the current edition of the Ordnance Survey six-inch map has since become a rocky outcrop, suggesting ongoing change to the landscape. The northern boundary of the general area has been removed entirely. What remains to define the space includes a wide earthen field boundary on the eastern side, 5.6 metres across and 1.45 metres high, planted with mature trees and accompanied by an outer drain nearly 6.3 metres wide and over 2 metres deep. A third-class road runs along the southern edge, and the western side follows the townland boundary. Immediately to the west, a tower house adjoins the area, with a church and graveyard lying roughly 100 metres further in the same direction, a clustering that hints at a historically settled and organised landscape.

The site sits within working farmland and there is no formal access or visitor infrastructure. The earthen boundary on the eastern side and the road along the southern edge offer the clearest orientation points for anyone trying to locate the area. The nearby tower house and church are the more legible landmarks in the vicinity. For those interested in aerial archaeology or in the way Irish landscapes preserve and conceal evidence of earlier land use simultaneously, Rochestown offers a quietly instructive example of how much depends on the angle from which you look.