"we use base drawings from architects, mechanical designers and other contractors and then place our services onto them. This also involves drawing the small fan coil units and the connecting services that are needed. We have been using AllyCAD for more than 10 years and have found it intuitive and …

"A few years ago we hired surveyors to help us record ground lying entities. In this way we could record things like lampposts, fences, sewer manholes etc. We then downloaded the information and overlaid our data onto those co-ordinates. We completed the whole of East London this way."