VERTCRS["Fair Isle height",
    VDATUM["Fair Isle"],
    CS[vertical,1],
        AXIS["gravity-related height (H)",up,
            LENGTHUNIT["metre",1]],
    USAGE[
        SCOPE["Geodesy, engineering survey."],
        AREA["United Kingdom (UK) - Great Britain - Scotland - Fair Isle onshore."],
        BBOX[59.45,-1.76,59.6,-1.5]],
    ID["EPSG",5741]]