Create surface model from rasterfile

Examples: Create surface model from house floor plan, create pipelines, roads or parking lot.

Perform Helmert transformation to raster file, to get it into the correct coordinate system
Click Tools --> Helmert
Select the transformation point(s) by clicking the correct points by the mouse
Add old coordinates and new coordinates to at least one point
Points can be added by clicking Add point
When all points are inserted, press Transform
Check that dx, dy, a, b, scale and angle are reasonable
Close the Hermert window
Helmert

Select Create new object --> Add line to create new line in correct coordinate system
Create new element by clicking File --> New
Zoom in and draw new line on top of the picture (for example: house corner points)
When last point is added, click on mouse right button and select Close line
Hide the raster file from Element list
Now your line should be clearly visible
Mouse right click and Snap to object
Click on the line to select it
Click Edit objects --> Edit line
Add surface code and height for the line, press Apply
New line

Select Tools --> Copy line
Select Outside and Offset and height differece (or what do you prefer)
Enter desired offsets (sideway and height)
Press Apply and your copied line should appear (depending the choices you entered)
Copy another line if you prefer (same way as the first)
Remove the original line, if it is not needed Delete
Copy line

Select Tools --> Triangulate
Add desired Surface code and Side length (default side length 30m works mostly)
Press Apply
Check the newly created surface by using mouse and view controls
Save the surface in .xml format
Triangulate