TerraModeler is software designed for creating, editing, and analyzing surface models (TIN) from various sources such as LiDAR points, XYZ files, and graphical elements. It enables precise terrain modeling with a wide range of visualization options, including contour lines, shaded surfaces, triangle meshes, slope directions, and elevation labels. Additionally, it supports the generation of cross-sections, volume calculations, and comparison of elevation differences between multiple models. Users can choose between mathematical contours, which closely follow the scanned points, and cartographic contours, which are visually optimized for map presentation. With support for various input formats and batch processing, TerraModeler is a reliable tool for applications in surveying, urban planning, and infrastructure design.