Difference Elevation between two points

[onsionsi1]

I would like to ask if there is a way to get an expression that calculated the difference between two points and pick up the results as point elevation.

Any advice will be appreciated.

[neilyj666]

I'd probably use a volume surface for this task

[onsionsi1]

Can you explain Mr.neilyj the procedure of it.

But is it helpfull because i have almost around 20 points

I will be appreciate for your advice

Thank you.

[Joe-Bouza]

I think neilyj's suggestion is predicated on the fact that the points in question share a common x,y coordinate. If so divide them into two group A & B, create two surfaces A & B with the appropriate points. then create a volume surface C; this can be selected in the pop down while creating a surface. make the base surface A and the comparison surface B. The resultant surface will be the difference between A & B, you can then, if desired  create another set of point C and assign elevations from surface C

[neilyj666]

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@Joe-Bouza wrote:

I think neilyj's suggestion is predicated on the fact that the points in question share a common x,y coordinate. If so divide them into two group A & B, create two surfaces A & B with the appropriate points. then create a volume surface C; this can be selected in the pop down while creating a surface. make the base surface A and the comparison surface B. The resultant surface will be the difference between A & B, you can then, if desired  create another set of point C and assign elevations from surface C

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Whilst the OP's requirements aren't clear this is not always necessary - for the final step you could create a new group made up of point group A or B (or any combination) and assign the elevations from surface C. This will give the elevation from a known point to an interpolated level on the other surface.

[jmayo-EE]

As Neil said, a little more info would be helpful.

You could draw a feature line between two points and use an expression to report delta z as well as the tin vol surface.