Open a land object. For more information on how to do so, see section 10.1.
Go to the land card (see image below).
Click the tab called "General" (see image below).
Specify which address you wish to update the geoposition from (see image below). Click the field "Address type". Then click an address in the list that opens. If the land object you are working with only has one address linked to it you can skip this step and go straight to step 5.
Click "Update geoposition from address" (see the first image below). When you do so, the geoposition for the land object you are working with will be updated. When a geoposition of a land object is updated, its map marker will be re-positioned (see the second image below). At the same time, the information in the fields called "Latitude" and "Longitude" will be updated (see the third image below).
