عنوان مقاله [English]
نویسنده [English]چکیده [English]
For geographic applications such as surface flow models, 3D visualization, simulation and analysis of visibility potential gaining information about land features (land’s lay) is a necessity. Basically, the Digital Terrain Model (DTM) includes sampling few points of the real world. Interpolation is still a difficult task in order to reconstruct a continuous surface of sample points. In this paper, the author attempts to discuss current issues of DTM production and interpolation technology including continuous advancement in information technology and increasing need of users to digital land models.