ISO 16695:2014定义了代表地磁场的参考模型。它密切反映和澄清了几十年来一直在使用的规范。 这种方法是通过具有特定数值系数（称为高斯系数）的球谐展开来表示相应的标量磁势。ISO 16695:2014涵盖的模型中，在任何时候，磁场的变化都是通过每个高斯系数的线性时间相关性来建模的。一个模型可能由一系列子模型组成，每个子模型中的系数随时间线性变化。对于这种逐步线性模型，系数在时间上是连续的。ISO 16695:2014提供了公式和逐步计算程序，以评估任何所需位置和日期的地磁参考模型。 ISO 16695:2014未规定地磁参考模型的地球物理内容的解释。 由模型制作者指定模型中包含（或排除）哪些内部和外部磁源。

ISO 16695:2014 defines reference models representing the geomagnetic field. It closely mirrors and clarifies specifications which have been in use for many decades. The approach is to represent the corresponding scalar magnetic potential by a spherical harmonic expansion having specified numerical coefficients, called Gauss coefficients. ISO 16695:2014 covers models in which, at any one time, changes of the magnetic field are modelled by a linear time-dependence of each Gauss coefficient. A model might consist of a succession of sub-models, in each of which the coefficients change linearly with time. For such a step-wise linear model, the coefficients are continuous in time. ISO 16695:2014 provides the formulae and a step-by-step computational procedure to evaluate a geomagnetic reference model for any desired location and date. ISO 16695:2014 does not specify the interpretation of the geophysical content of a geomagnetic reference model. It is left to the producer of a model to specify which internal and external magnetic sources are included in (or excluded from) their model.