TY - JOUR A1 - Meidow, J. A1 - Hammer, H. A1 - Lucks, L. T1 - DELINEATION AND CONSTRUCTION OF 2D GEOMETRIES BY FREEHAND DRAWING AND GEOMETRIC REASONING JO - ISPRS Ann. Photogramm. Remote Sens. Spatial Inf. Sci. J1 - ISPRS-Annals VL - V-5-2020 SP - 77 EP - 84 Y1 - 2020/08/03 PB - Copernicus Publications SN - 2194-9050 UR - https://isprs-annals.copernicus.org/articles/V-5-2020/77/2020/ L1 - https://isprs-annals.copernicus.org/articles/V-5-2020/77/2020/isprs-annals-V-5-2020-77-2020.pdf DO - 10.5194/isprs-annals-V-5-2020-77-2020 ER -