should be displayed by sexagesimal fractions (i.e. minutes and seconds). When minutes and seconds are less than ten, leading zeroes should be shown. Degree, minutes and seconds should be followed by the symbols ° (U+00B0), ′ (U+2032), and ″ (U+2033), without spaces between the number and symbol. North and south latitudes should be indicated by N and S following immediately after the digits. East and west longitudes should be indicated by E and W following immediately after the digits. Units of elevation or depth should be given by symbols, immediately after the digits. Elevation below reference level or depth above reference level should be indicated by a minus sign − (U+2212). Examples: 50°40′46.461″N 95°48′26.533″W 123.45m 50°03′46.461″S 125°48′26.533″E 978.90m The standard does not specify how coordinates at the equator, prime meridian or antimeridian should be written. XML representation (Annex F) The XML representation based on the conceptual model of Annex C uses XML namespace http://www.isotc211.org/2006/gpl. However, there is no published XML schema at the time of writing (August 2011). <gpl:GPL_CoordinateTuple xmlns:gpl="http://www.isotc211.org/gpl"> <gpl:tuple srsName="urn:ogc:def:crs:EPSG:6.6:4326"> 35.89421911 139.94637467 </gpl:tuple> </gpl:GPL_CoordinateTuple> String expression (Annex H) A string expression of a point consists of latitude, longitude, height or depth, CRS identifier, and trailing solidus (/) without any delimiting character. When height or depth is used, there must be CRS identifier. Latitude Latitude is a number preceded by a sign character. A plus sign (+) denotes northern hemisphere or the equator, and a minus sign (-) denotes southern hemisphere. The integer part of the number is a fixed length. The number of digits in that part indicates the units, thus leading zero(es) must be filled when necessary. The fractional part must have the appropriate number of digits to represent the required precision of the coordinate. Longitude Longitude is a number preceded by a sign character. A plus sign (+) denotes east longitude or the prime meridian, and a minus sign (-) denotes west longitude or 180° meridian (opposite of the prime meridian). Rules about the number of digits are the same as for latitude. Height or depth When height or depth is present, CRS identifier must follow. Positive direction and units are defined by CRS. Negative number does not necessarily mean position below reference level. Positive is up for height, down for depth. CRS identifier The CRS identifier begins with "CRS". There are three styles: When a registry provides online resolver, CRS<url> When a registry is offline,