Introduction > Concepts & structure

The basic concept is to view BricsCAD (or AutoCAD) as our 3D operating system that KTF works within. A KTF project will generally consist of one or more site drawings (survey plus design layouts etc.) plus section drawings. In addition to the .dwg files a number of other files (in the project folder) store section, model and design data. Logical naming of these files will help with organizing the project. KTF gets information from "standard" CAD entities (Polylines, Blocks etc.) and does not create any customised objects so that a drawing created in KTF may be supplied to a client to read in BricsCAD Classic (or AutoCAD LT) without the need for any additional object enabling software. Extensive use is made of 3D Polylines to represent existing ground and design features.

To keep the way that the application works as simple and flexible as possible there is no big hidden complicated database in the background and ground model and section files etc. are not dynamically linked to any drawing. Models are typically created from a selection set of 3D entities and stored as a .kgm file. Sections are created from 3D entities or models and as a separate function are drawn to user specified presentation parameters. There are no specific layer requirements or standards – the template drawing initially has some example layers.