Yorkshire Henges National Mapping Programme
A series of Neolithic henge monuments are located on the Magnesian Limestone in North and West Yorkshire. The Yorkshire Henges and their Environs Air Photo Mapping project aimed to place them in their contemporary and later landscape contexts.
It did this by generating accurate and detailed mapping of levelled and upstanding archaeological features visible on air photos and lidar. The project was funded by English Heritage’s Historic Environment Enabling Programme.
It was undertaken by an independent consultant based with the Aerial Survey and Investigation (North) team – now Historic England’s Aerial investigation and Mapping team.
The area of the project
This project covered an area of 586 square kilometres, encompassing the extent of the Southern Magnesian Limestone Belt in North Yorkshire. It extends as far north as Catterick and eastward to the River Swale across parts of the Vale of Mowbray and the Vale of York. It encircles a similar project, Thornborough Henges and their Environs , which was completed in 2005 and keys into two other earlier projects, the Lower Wharfedale NMP Project and the Vale of York NMP Project.
The methodology of the project
This project mapped archaeological features visible as cropmarks, soilmarks and earthworks on vertical and oblique air photographs and lidar-derived images. The sources of the air photographs were as follows:
- Historic England Archive specialist, military oblique and vertical collections
- Cambridge University oblique and vertical air photographs
- North Yorkshire HER oblique air photographs
- Google Earth
The lidar data originates from the Environment Agency and was provided as JPEG images.
The traditional vertical and oblique air photos were rectified and georeferenced using a computer program. These were combined with the other imagery in a GIS and the archaeological features were digitised.
All objects were tagged with information that will assist in the management and interrogation of the archaeological data. This includes the monument record number, period, type and photo sources
Accessing the data
The project was completed in February 2013 and the data is now in both the Historic England Archive and North Yorkshire’s HER.
All monument records created by the project are available online through PastScape.
The images used on this page are copyright Historic England unless specified otherwise. For further details of any photographs or other images and for copies of these, or the plans and reports related to the project please contact the Historic England Archive.
For further information on a project or any other aspect of the work of the Remote Sensing Team please contact us via email using the link below.
Historic Places Investigation
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The aerial survey of the Thornborough Henges and their environs was an NMP project undertaken to inform English Heritage’s Conservation Plan
The Pennine Dales Fringe NMP covered an area between Masham and Harrogate. It mapped archaeological features from air photos and lidar imagery.
The Vale of York project mapped a range of features from the prehistoric period to the 20th century.
The aerial survey of Lower Wharfedale was an NMP mapping project covering an area of 1,100 square kilometres, mostly lying within West Yorkshire.