Support
How are 3D polylines projected onto a longitudinal profile?
Projection of 3D polylines onto a longitudinal profile is a useful tool in TcpMDT for representing elements such as pipe crossings or power lines in the profile elevation.
To perform this process, it is essential to have the longitudinal profile previously drawn in the CAD. The steps and options are as follows:
Selection Methods
When executing the command, the program allows you to select the 3D polylines in two ways:
Graphically: The user directly selects on screen the polyline or polylines they wish to project.
By Layers: The layers containing the polylines are selected. In this case, it is recommended that these layers do not contain other types of objects to avoid errors in the process.
Information Required by the Command
Once the polylines are selected, the program will request identification of the following elements in the drawing:
Profile: You must graphically designate the profile onto which the projection will be made.
Reference Axis: You must select the axis (alignment on ground plan) from which said profile was generated.
Other Related Options
Project Polylines: Similarly to polylines, MDT points or CAD coordinates can be projected onto the profile, allowing you to choose a specific block to represent them and label additional information such as the point number, its code, or the Distance to Alignment.
Project on Ground Plan: The reverse process is also possible; you can designate points or the entire profile on the longitudinal profile so that the program creates a 3D polyline in the ground plan with the corresponding elevations.
Projection on Cross-sections: MDT also allows projecting the section of a 3D polyline onto an array of cross sections to see, for example, the position of a conduit in each section of the roadway.