Grid Volume - Changing Grid Spacing

[JMcCoskey]

Understanding that composite volumes are typically more accurate, I have a reason to evaluate the volume between two surfaces via a grid volume.  Easily created a grid volume surface using a 50' grid (50' is large for this site, but wanted to get a feel for calculation time).

Question: Can you change the grid size without creating a new grid surface?  Ultimately I woud like to explore the difference in volumes based on grid sizing without creating a long list of surfaces.  One would expect that you could chage the grid spacing in surface properties, but the values are non-editable.

I have scoured Autodesk forums, and other on-line forums, but have found nothing.  Any input is appreciated.

Thanks.

Civil3D 2011 64bit Win7

[ces]

I am wondering the same thing...

[jmayo-EE]

No. Not directly from the surface definition or properties. The properties dialog may tease you but it doesn't work.

If anyone has a workaround I am all ears...

[mia.espositoYUWQ9]

guessing this never got resolved 😞

[TerryDotson]

Regardless of the software, you can't simply change grid spacing.  For a more dense scenario, software would have to interpret new elevation values at the new cell nodes.  These values would be calculated along the slope of the previous nodes anyway and you really haven't gained anything.

On the case of weeding (or less dense), if calculation speed or memory is suffering, a tool could halve the values, discarding every other node.  Keep in mind that a grid surface is already likely a derivative of a TinSurface (from Lidar?).  A resized grid would be a derivate of that, and the more you get away from the source, the less you could trust the data.

I say there is a good reason why this doesn't exist and don't consider it a problem.