Contour interval in TOC

[Lohengrin]

Once again, thanks Ed for explaining the considerations so thoroughly and expertly. That's exactly what I was looking for. I'm always a stickler for uniformity and I was curious as to the variance of the contours, not surprisingly favoring the "higher resolution" where possible. But at least it gives me a better understanding of the process involved. I seem to recall from somewhere that JT had some very detailed maps of the area around Moscow, and that might explain why those are 20m intervals.