I have a polyline dataset which contains asset types as attributes. Based on these different asset types I would like to subtract a value from the Z-coordinates so that the lines will be displayed at the correct depth.

I was thinking I can use an attribute filter to filter the different asset types and subsequently use a 3Dforcer to lay the different polylines on their correct depth. As an example I used the following parameters in the 3Dforcer for 1 attribute of the field asset type:

Elevation: @ZValue()-1

Preserve Z-values: No

The result was as follows:

1 polyline features has 3 vertices:

Before translation:

1st

vertex Z: 0,6

2nd

vertex Z: 0,8

3th vertex Z: 1,0

After translation:

1st

vertex Z: -0,2

2nd

vertex Z: -0,2

3th vertex Z: -0,2

What I would like to have:

1st

vertex Z: -0,4

2nd

vertex Z: -0,2

3th vertex Z: 0

This translation provides a constant Z

value based on some average of mutliple vertices. I want it to take into

account each individual Z and then substract the ammount specified.