Site relations table
Table indicates how each designated site relates to others (overlapping, neighbouring sites, containing each other etc)
||Unique site reference code
||this field can only contain existing site codes as identified in the Sites table.
||Related site code
||the unique record identifier of the related site.
||the percentage of the described site that is overlapping with the other site.
||the type of relationship between two sites (see look-up table Site relation categories).