TY JOUR TI Improving technologies for enhancing the quality of open data in digital terrain models for urbanized areas KW convolutional neural network (CNN) KW DEM KW radar survey KW SAGA GIS KW data cleaning JO Spatial Data: Science, Research and Technology AU Lebedev, E.D. AU Gruzdev, S.S. PY 2023 IS 14 PB MIIGAiK