contour style

[ryan.beisaw]

I have a surface that spans a river and would like to create different linetypes and colors for those contours that are nevative values. Is that possible to do within one surface - Have two different visable sets of contours within one surface style?

[Joe-Bouza]

One way I would do it is to make another surface called channel, paste the mother surface into it and add a boundary for the channel. Set it contour style to dahed. Use the same boundary as a hide boundary in the mother and you will get the change

[jmayo-EE]

I wonder if you could use an expression to hide the negative contours and have user contours defined for the channel?

[jmayo-EE]

Nope don't think you can hide the negative with expressions. In a label yes but not the contour.

Though I would like to be proven wrong.

[Joe-Bouza]

Interesting. How would you go about that? I started looking at

IF({Surface Elevation}<0,?,?), but don't know what to do with it for contour display? Surpressing a label would be easy

[jrauch]

Use the Analysis tab to sort the contours into two groups.  Apply a style that shows uses a color scheme for contour analysis.  Then you can achieve what you're looking for with one surface.

[Joe-Bouza]

Hi

I can do the analysis but cant get them to display as analyzed. How do you do that?

[jrauch]

Make sure you have a surface style that uses a color scheme in the contour analysis.

[Joe-Bouza]

Thats the button I was looking for!

Thanks. double kudos for that

[ryan.beisaw]

I feel like I could get there somehow by using the analysis tab in the surface properties. Ive picked two ranges and can edit colors and linetypes as shown, but after I apply and whatnot, nothing seems to happen...

[jrauch]

Check out my post above - it's got a screenshot - you need to create a new surface style that uses a color scheme for contours.

[Joe-Bouza]

Now edit the style being used, go to the contour tab an set color scheme to true as jrauch has shown us.

[jmayo-EE]

There's the answer. Thanks!

[Joe-Bouza]

thats a goodie! just like cut an fill contours

[jmayo-EE]

Yes sir. Just goes to show that if everyone is thinking the same thing then no one is really thinking. 😉

[ryan.beisaw]

BOO YAH! GOT IT! THIS IS AWESOME THANKS FOR YOUR HELP!

Its hard to tell with the black background, but all the contours in the river are dots and up on the banks are hidden linetype. Does this mean I can go home now?! haha 😛

[BrianHailey]

I know you have a solution already but this might work for you as well. I did this to display the contours on steeper areas at a different interval than those on flatter areas: 

http://civil3dplus.wordpress.com/2010/03/12/contour-intervals-based-on-slope/

It MIGHT do what you want then again it might not.