Going below to protect the above

Standing since medieval times, the famous Lincoln Cathedral in the United Kingdom provides some of the most remarkable architectural elements in the British Isles. Records show Saxon houses from the 12th to 17th centuries within the church’s courtyard. Along with these elements comes many buried archaeological relics dating back to the construction in 1072.

As the cathedral prepares to undergo renovations to develop a new refectory and visitor facilities, planners needed to ensure no historical artefacts could be harmed during the process. They turned to Technics, a geospatial consultancy specialising in building and utility surveying across the U.K.

Looking below

Technics在历史悠久的大教堂进行了深度雷达（GPR）调查，以提供详细的地下数据，以检测考古和实用性特征。

The GPR data has been used to support the development plans, and, most importantly, minimise the risk of damage to any buried archaeological evidence as well as plot the position of known and unknown utilities.

Technics used a suite of GPR systems byIDS Georadar。其中包括RIS MF HI-MOD，这是一个专门的GPR系统，能够调查大型区域以生成3D视图，而新的流C（新的流C）是公司实时3D地下公用事业和功能的公司阵列解决方案。Technics以高分辨率捕获了多个3D数据集，用于后处理可检测的公用事业和考古特征。

“我们很高兴采用我们现场拥有的IDS Georadar设备套件，包括新的流C。在Gred HD中处理结果使我们的团队能够以三种不同的视图（层析成像，横截面和3D）查看数据集，“技术董事总经理约翰·麦金太尔（John MacIntyre）说：“结果非常有效地强调了大量被埋葬的罗马墙，并明确证明了拟议游客设施的中世纪院长。”

Protecting history

Having carried out the detailed survey, Technics was able to compare the GPR data and evidence from boreholes, which included traces of Roman tiles, ceramics, plaster and tesserae. Analysis of the GPR data revealed the positions of a series of probable structures, including parts of Roman, post-Roman and medieval buildings.

这些结果现在将使计划中的工作具有先验知识，以最大程度地减少对历史元素的损害。大教堂官员现在还可以促进适当的录音计划，以了解在开发过程中无法避免的考古特征。

“The GPR survey to the north of the Cathedral revealed the traces of the Medieval buildings where we expected them, but much more vital and interesting, it showed a mass of deeply buried Roman walls beneath them in the area where the new shop, museum and restaurant were designed to be built,” said professor Dominic Powlesland, Lincoln Cathedral archaeologist consultant. “Finding this out at an early stage has been crucial in allowing modifications to the plans within a scheduled area, which would otherwise have been ruinously expensive once the project got underway.”