The file ContextData.csv contains the searchable non-free text part of the context sheets that are not to do with: Interpretation Free Text Stratigraphic relationships References to images and site drawings All dimensions are given in metres. Formation process category data is given as a code and as a free text explanation of the code in separate fields. Due to the different fields describing different classes of context ( i.e only deposits can be described using a formation category), a missing value in a field should be understood as not applicable or unknown depending on circumstance.