The March-April issue of GIM International is dedicated to unmanned aerial systems (UAS) and their role in the mapping and surveying profession. There have been rapid advancements in drones over the years, yet there is widespread consensus that we have still only seen a fraction of how UAVs could ultimately improve efficiency for geospatial professionals and their customers. This edition contains the following articles:

A selection of articles in this issue of GIM International are:

- The Multispectral Journey of Lidar
- Point Clouds as the Future Topographic Core Data
- Interview with FIG President Rudolf Staiger
- Landsat: the Cornerstone of Global Land Imaging
- 3D City Modelling of Istanbul