BS ISO 19162:2015 pdf free
BS ISO 19162:2015 pdf free.Geographic information – Well-known text representation of coordinate reference systems
The following constraints shall apply:
i) In WKT strings all axis abbreviations shall be from the <wkt Latin text character> set.
ii) For geodetic CRSs having a two-dimensional ellipsoidal coordinate system, the two-dimensional ellipsoidal coordinate system axes are geodetic latitude and geodetic longitude. In WKT strings the values of axis name shall be ‘latitude’ and ‘longitude’ respectively.
NOTE ISO 19111:2007 specifies the lower case Greek letters φ and λ as symbols for geodetic latitude and geodetic longitude. In this International Standard the abbreviations to be used in WKT strings must be from the Latin character set. P and L are the transliterations of the Greek letters phi and lambda. B for Breite and L for Lange are the standard German abbreviations and used in academic texts worldwide. ‘lat’ and ‘lon’ are in common usage.
iii) For geodetic CRSs having a three-dimensional ellipsoidal coordinate system, the name and abbreviation of the horizontal axes in a WKT string shall follow the requirements in (ii). The vertical axis name shall be ellipsoidal height’; the vertical axis abbreviation shall be “h’ and should be included when abbreviations for the horizontal axes are included.
iv) For geodetic CRSs having a geocentric Cartesian coordinate system, in WKT strings the axis name should be omitted as it is given through the mandatory axis direction, see 7.5. 4(iii), but the axis abbreviation, respectively ‘X’, ‘Y’ and ‘Z’, shall be given.
v) For projected CRSs, the two-dimensional Cartesian coordinate system axes names shall be ‘northing’ or ‘southing’ and ‘easting’ or ‘westing’ and shall be given when the axis direction and order are not east first, north second. Axis name may be omitted from WKT strings when the axis direction and order are east first, north second with abbreviations ‘E’ and ‘N’ respectively.Axis abbreviation shall be given.
vi) For vertical CRSs, the axis direction is up or down, see 7.5.4. In WKT strings the value of axis name shall be ‘gravity-related height’ and ‘depth’ respectively. Axis abbreviation may be omitted but if given for height it shall not be “h’ (which is used for the ellipsoidal height component of an ellipsoidal 3D coordinate system, see 7.5.3(iii) above); the abbreviation for gravity-related height should normally be ‘H.BS ISO 19162 pdf free download.
