1. A method for determining the position of a target, the method comprising the steps of: measuring, with a range and direction measuring device, the relative position of at least one reference object in relation to the range and direction measuring device; marking the at least one reference object in a geo-referenced three-dimensional map so as to obtain a geo-referenced coordinate within the geo-referenced three-dimensional map that is associated with the at least one reference object, whereby the geo-referenced coordinate associated with the at least one reference object is obtained from the geo-referenced three-dimensional map; measuring, with the range and direction measuring device, the relative position of a target in relation to the range and direction measuring device; and calculating a geo-referenced position of the target based on the measured relative position of the at least one reference object in relation to the range and direction measuring device, based on the measured relative position of the target in relation to the position of the range and direction measuring device, and based on the obtained geo-referenced coordinate of the at least one reference object.