ISPRS-AnnalsISPRS Annals of Photogrammetry, Remote Sensing and Spatial Information SciencesISPRS-AnnalsISPRS Ann. Photogramm. Remote Sens. Spatial Inf. Sci.2194-9050Copernicus PublicationsGöttingen, Germany10.5194/isprs-annals-III-4-1-2016PrefaceJieJiang1National Geomatics Center of China No. 28,Lianhuachi West Road, Haidian district,Beijing, 100830 Beijing, China03062016III-411This article is available from https://isprs-annals.copernicus.org/articles/isprs-annals-III-4-1-2016.htmlThe full text article is available as a PDF file from https://isprs-annals.copernicus.org/articles/isprs-annals-III-4-1-2016.pdf