The abstract root is used for the sole definition of the configuration version attribute. The root node of the deegree crs-definitions-xml file. The definitions contains the reference to the files from which the definitions can be read. The root node of the deegree crs-definitions-xml file. The definitions node must at least contain one ellipsoid a datum element and a crs. The root node of the deegree datum definitions (file). The definitions node must contain at least one datum element. The root node of the ellipsoid definitions (file). The definitions node must contain at least one ellipsoid element. The root node of the prime meridian definitions (file). The definitions node must contain at least one prime meridian element. The root node of the transformation definitions (file). The definitions node must contain at least one transformation element. The root node of the projection definitions (file). The definitions node must contain at least one projection element. A simple element defining the possible axis' orientation The units currently supported by the deegree-crs-library. The ellipsoids, datums, wgs84Transformations, projections and crs's must have at least one identifier and may have more descriptive values. The definition of an Axis in the deegree-crs-library. The definition of a prime meridian, with longitude (in units) from greenwich. The definition of a Datum in the deegree-crs-library. The usedEllipsoid is a reference to the id of an ellipsoid defined in the crs-configuration. Same is true for the usedPrimeMeridian, if this is omitted the greenwich meridian is used. If no conversionInfo (also a link to an existing object) is given, it is assumed that the datum needs no conversion into wgs84 (e.g. the ESR:89 datum). The definition of an ellipsoid in deegree-crs-library. Defines a transformation (change of datum) for a given source and a given target crs A Transformation defines the parameters necessary to transform a specific datum into the wgs-84 datum. A Transformation defines the parameters necessary to transform a specific datum into the wgs-84 datum. The base type of all transformations defines standard elements used in all transformations. The least square type defines scale x and scale y values. A simple list of doubles A simple type, which can be used to define a lat-lon in radians or degrees. False if the given latitude/longitude is in radians. If omited degrees will be assumed. The base type of all projections defines standard elements used in all projection. A transverse mercator projection only needs the supplement information of the norther/southern hemisphere, if failing northern hemisphere is assumed. A Stereographic Azimuthal projection only needs the supplement information of the true scale latitude, which defines the latitude (in radians) around the projection point for which the projection has a true scale. If failing the projection latitude is assumed. A Lambert Conformal Conic projection needs the supplement information (like all conic projections) of the first and/or second projection parallels, e.g. the parallels which intersect with the datum. If failing the projection latitude will be assumed. The base type of all crs's defines an extra element to define the axis-order of the implementing crs. Deegree supports up to 3 axis. A geographic crs is defined on a datum. The value should be a valid id of an element in the configuration. A compound crs is defined on a crs with a vertical Axis defining the height above or below the ellipsoid. The default height, denotes a height value if no z coordinate is given. A geocentricCRS is a coordinate system which is defined with it's center at the earths mass. A projectedCRS is a coordinatesystem which uses a projection as well as a geographicCRS. Both should be references to an id defined in the deegree-crs-configuration.