So there was some economy of design effort. Still, I don't know why one spiral design to go with each degree of circular curve wouldn't have sufficed.

I haven't calculated anything it, but the fact the circular curve is consistently off in one direction makes me wonder if the curve was used for one o...

I have 4 survey textbooks that might have covered the topic, 2 of which each give a method of defining and laying out spirals but neither is the Searl...

@loyal How did the railroad guys lay out the spiral??ÿ I can't imagine they did a setup every 30 ft, or held accuracy over the whole spiral if they d...

tan ...?ÿ sin ... "cos" that's more fun?

16 or 15?

I think I have it (within hundredths) in this spreadsheet I would hate to have to do this without the spreadsheet, like the original designer did. ...

Wonderful!?ÿ

I may compute this, as I think I know how, except I'm not sure how to express the answers for comparison to what you may post later. N & E with t...

A bigger shotgun than I'd put up to my shoulder, with the larger barrel over an inch and a quarter diameter!

Educate me, please.?ÿ What does that look like?

Surveyors should work to get that changed to allow ROW edges OR C/L to be monumented. You may lose a lot of edge monuments, too, but it won't be all a...