TY - JOUR A1 - Biagi, L. A1 - Carcano, L. A1 - de Agostino, M. T1 - DTM CROSS VALIDATION AND MERGING: PROBLEMS AND SOLUTIONS FOR A CASE STUDY WITHIN THE HELI-DEM PROJECT JO - Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci. J1 - ISPRS-Archives VL - XXXIX-B4 SP - 265 EP - 270 Y1 - 2012/07/31 PB - ISPRS SN - 2194-9034 UR - https://isprs-archives.copernicus.org/articles/XXXIX-B4/265/2012/ L1 - https://isprs-archives.copernicus.org/articles/XXXIX-B4/265/2012/isprsarchives-XXXIX-B4-265-2012.pdf DO - 10.5194/isprsarchives-XXXIX-B4-265-2012 ER -