Hillshade image of the elevation of the B Series observation surface relative to the ellipsoid vertical datum

This hillshade image provides the elevation values that define the observation surface for the "B" series grids relative to the GRS80 ellipsoid for the GDA94 datum. The "B" Series grids were produced using the gravity data in the A Series grids but also include data from a number of airborne gravity and airborne gravity gradiometer surveys.

本晕渲图像提供了定义“B”系列格网观测表面所需的高程值，该高程值以GDA94基准面（GDA94 datum）对应的GRS80椭球体（GRS80 ellipsoid）为参考基准。“B”系列格网基于A系列格网中的重力数据生成，同时还纳入了多组航空重力与航空重力梯度仪（airborne gravity gradiometer）的勘测数据。