Hello Everyone,

I have been implementing many line control codes and I would really like to see a line control code that both spirals into the adjacent straight lines as well as generate a smooth curve which travels throughout the points along the curved line. As of now, it inconvenient to use the "tangential arc" "non-tangential arc", and "smooth curve" line control codes to generate what I want. Is there any convenient solution TBC can offer? Thank you! line control codes

Can you show more points than what you did, to see what's going on before and after your curve?

My experience with different cad software over the years, is located curves are always finicky. Sometimes the curve in the field isn't a simple curve and of course where and how many points you locate on the curve greatly affect the drawn result. I've only just started experimenting with TBC control codes, but only to have lines drawn and stopped on my TA map in the field. I've found Bentley cad software to handle/draw curves the best.

Hard to tell from your screen capture, but it looks like your curve is rather small? Hard to read your scale. In general for small curves for use in autodesk or bentley cad base mapping, I collect at least 2 points "on" the curve - excluding the PC/PT. Those 2 points being on the 1/3 and 2/3 point of the curve to try to give the best info to have the curve drawn. Poor looking curves in cad software is either a result of feature in the field not being a simple curve, collecting not enough/poor locations on the curve points in the field, bad observations (rod not being "ready"). You should expect to have to switch control codes for some curves based on the geometry/tangent or non-tangent and how it comes in. I do this at times in both other software I mentioned. Use what works.

Today for the first time I used non-tan PC/PT control codes where is looks like I should have tried smooth curve instead. Looks like non-tangent control codes are for "sharp" obviously non-tangent curves. Smooth curve might be the one to use when things seem tangent in the field and/or when you have a complex large curve with reversing directions.