The history and problems of mapping in Greenland are briefly reviewed, with particular reference to the Indlandsis (the Ice Cap) and the glaciers. The author calls for greater collaboration between the glaciologist and the topographer, and cautions against placing too great reliance on the present maps for calculations of the volume of the Indlandsis. Techniques now being developed will lead to a much more accurate assessment of volume. Finally, the regime of an ice-dammed lake in southwest Greenland is discussed on the basis of photogrammetric data and as an example of how such data can be used to explain glaciological phenomena.