我通过使用RenderTransform"选择了一个不同的选项，这使我能够将MapControl"扩展到页面底部下方，从而移动MapIcon"和正如我想要的那样，MapControl 中心更靠近页面底部.它不干净，但有效.

I choose a different option by using 'RenderTransform' which enable me to extend the 'MapControl' below the bottom of the page and thereby moving the 'MapIcon' and MapControl center closer to the bottom of the page just as i wanted. Its not clean but it worked.