Foreword to the Special Issue on the 2015 IEEE International Geoscience and Remote Sensing Symposium

The papers in this special section were presented at the 2015 International Geoscience and Remote Sensing Symposium (IGARSS 2015)was held on July 26 through 31, 2015 at the Milano Congressi Center in Milano, Italy. The main theme of the conference was Remote Sensing: Understanding the Earth for a Safer World.