@Article{isprs-annals-IV-4-W9-1-2019,
AUTHOR = {Ellul, C. and Abdul Rahman, A. and Coors, V. and Zlatanova, S. and Laurini, R. and Rumor, M.},
TITLE = {PREFACE},
JOURNAL = {ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences},
VOLUME = {IV-4/W9},
YEAR = {2019},
PAGES = {1--2},
URL = {https://isprs-annals.copernicus.org/articles/IV-4-W9/1/2019/},
DOI = {10.5194/isprs-annals-IV-4-W9-1-2019}
}