Shoe size "Footwear - Sizing - Vocabulary and terminology"; currently in development are companion standards ISO/TS 19409 "Footwear - Sizing - Measurement of last dimensions" and ISO/TS 19410 "Footwear - Sizing - Inshoe measurement". The adult shoe sizes are calculated from typical last length, which is converted from foot length in mm by adding an allowance of two shoe sizes: where formula_13 is foot length in mm. Direct conversion between adult UK, European and Mondopoint shoe size systems is derived as follows: Exact foot lengths may contain repeating decimals because the formulas include division by 3; in practice, approximate interval steps of
ISO 6709 Longitude is a number preceded by a sign character. A plus sign (codice_2) denotes east longitude or the prime meridian, and a minus sign (codice_3) denotes west longitude or 180° meridian (opposite of the prime meridian). Rules about the number of digits are the same as for latitude. The CRS identifier begins with "CRS". There are three styles: The example of original Annex H always use "CRSWGS_84". ISO 6709 ISO 6709 "Standard representation of geographic point location by coordinates" is the international standard for representation of latitude, longitude and altitude for geographic point locations. The first edition (ISO 6709:1983) was