. "E47"^^ . "E47 Spatial Coordinates"@en . "Scope note:\nThis class comprises the textual or numeric information required to locate specific instances of E53 Place within schemes of spatial identification.\n\nCoordinates are a specific form of E44 Place Appellation, that is, a means of referring to a particular E53 Place. Coordinates are not restricted to longitude, latitude and altitude. Any regular system of reference that maps onto an E19 Physical Object can be used to generate coordinates.\n\nExamples:\n- \"6\u00B05'29\"N 45\u00B012'13\"W\"\n- \"Black queen's bishop 4\" [chess coordinate].\n\nIn First Order Logic:\nE47(x) \u2283 E44(x)"@en . .