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Designations Cropmark Mapping

Date June 2017

Event ID 1109552

Category Project

Type Project


Mapping of cropmarking recorded on mainly oblique aerial photographs is undertaken in support of Designations by staff in the HES Designations and Survey and Recording teams. Oblique aerial photographs are processed in Aerial 5 software to produce a rectified TIF, associated TFW georeferencing file and a mapping control file (RDA file). Height data of at least 5m interval is used to improve accuracy, and the metrical accuracy (generally < 1m) of the rectification at the control points is documented in the RDA file. Interpretative mapping is undertaken in ArcGIS, or other GIS package, and quality assured before inclusion in the National Record of the Historic Environment.

Information from HES Survey and Recording (KMM) December 2020.

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