I am looking for a possibility to create a second line in a given distance to an existing line. The existing line is curved, so simply create parallel line segments with CAD tools will not work.
I mapped vegetation types in the surroundings of small streams. The vegetation types have to be displayed on the map as stream-accompanying lines, parallel to the water bodies. So the second line (vegetation) has different properties compared to the first line (stream) and is a feature of a different shapefile.
The solution I found yet is to create buffers around the streams and to trace their borders, but it is time-consuming.