I have a task where I have plotted positions along an alignment (see red dots in images) and I need to plot two offset points (from the chainage locations) at varying distance parallel to the alignment (see image 2). I am not sure how to go about it.
I have thought about:
- working out the direction of the line and from that,
- then working out what the offsets x,y should be using trigonometry,
- create new points for the offset using the results of the trigonometry.
I was also thinking of:
- creating a 1m buffer around the points,
- using the buffer to clip the line into segments, then
- copy the line parallel on the left and right side using the specified distances
- then use feature vertices to points tool with mid as the point type to get the offset positions.
If there were only a few points, I would use the second method above, but unfortunately, I have hundreds.
I am familiar with Arcgis 10.1 and have a sound understanding of Arcpy and python.