topic Re: Slope Analysis only give 2 ranges in Civil 3D Forum

Slope Analysis only give 2 ranges

neilyj666 — Tue, 18 Dec 2018 11:58:19 GMT

Can anyone shed any light on why I can only get 2 Slope ranges in my analysis - even when 6 are chosen?

Re: Slope Analysis only give 2 ranges

Hidden_Brain — Tue, 18 Dec 2018 14:10:43 GMT

check the surface style, under analysis tab>slopes>group by. yours might be set to equal interval, change to quantile and run analysis again.

Re: Slope Analysis only give 2 ranges

neilyj666 — Tue, 18 Dec 2018 14:18:47 GMT

Perfect solution - that was indeed the problem....:)

Re: Slope Analysis only give 2 ranges

doug_manville35K9Y — Thu, 02 Nov 2023 18:02:57 GMT

getting this same issue in 2020, 2022, 2023 and 2024. it is repeatable. something is broken. i can see the analyzing date box flash then then it stops. any one else having this issue.

Re: Slope Analysis only give 2 ranges

Udo_Huebner — Thu, 02 Nov 2023 18:44:31 GMT

If the terrain consists of only a few and very flat triangles, it may not be possible to create as many ranges as entered. In this case, first check the surface statistics or post the DWG here.

Re: Slope Analysis only give 2 ranges

doug_manville35K9Y — Thu, 02 Nov 2023 19:00:55 GMT

Re: Slope Analysis only give 2 ranges

doug_manville35K9Y — Thu, 02 Nov 2023 19:04:28 GMT

Thanks for the fast response.

I am able to create a new style and to get it to work, but I can't see any difference in the 2 surface styles. I tested your theory on the limited triangles on a test surface and was able to produce the error as you have stated. this surface has a lot of triangles. I'm wondering if the surface style is corrupt.