GRA Civil 3D Grading Tutorials

Grading Definition Grading, in terms of Computer Aided Design or Building Information Modeling, is the process of digitally altering a terrain model (i.e. a topographical surface) to meet watershed, drainage, and access requirements for a site. As an exercise in terrain modeling has its roots firmly planted in an understanding of breakline placement, points, lines, and planes (as well as other types of AutoCAD & Civil 3D objects), each can... [Read More...]

DTM Civil 3D Digital Terrain Modeling Tutorials

Digital Terrain Modeling Definition A Digital Terrain Model (DTM) is a digital file, or a digital representation within a file, providing a detailed representation of topographical variations in the Earth’s surface. In Civil 3D, a DTM is created from a Triangular Irregular Network, or TIN. A TIN is a vector-based data structure for storing terrain information in a digital terrain model. In a TIN data model, each sample point has an x,y coordinate... [Read More...]