def geom_converter(term):
    """A converter for normalizing the geometry type."""
    if 'point' in term.lower():
        return 'Point'
    elif 'string' in term.lower():
        return 'Line'
    elif any(v_type in term.lower() for v_type in ['polygon', 'chain']):
        return 'Polygon'
    elif 'composite' in term.lower():
        return 'Mixed'
    elif 'raster' in term.lower():
        return 'Image'
    return term