Create a TIN volume surface

00:06

In this video, we're going to talk about TIN volume surfaces.

00:10

What TIN volume surfaces are is they are a surface that compares two different surfaces to each other,

00:16

to find out how much volume is in between those two surfaces.

00:19

And this is important because if you have a surface that's, for example, our existing surface,

00:24

and you have a surface that is some form of amount of grading or work that you want to take place,

00:29

then you can find out exactly how much import or export you need to have in order to complete that work.

00:35

So what we're going to go ahead and do is I have hidden in this drawing a couple of feature lines that we're going to use to create a new surface,

00:42

and then we're going to use that surface to create a new TIN volume surface.

00:47

So if you go down into the bottom here for TIN-VOL-HID,

00:56

these are the two feature lines that I have that were created to create our new work surface.

01:02

So what we're going to go ahead and do is we're going to create a new surface and we're going to call it Work.

01:11

And we're going to go ahead and have it displayed as a 2' and 10' background and we're going to click "OK".

01:17

And then we're going to define it by adding in some breaklines.

01:21

So we're going to add them in, we're going to call them Feat because they're feature lines.

01:27

And we are going to have them be standard because that's how they were created.

01:32

All the vertices that are included as part of these feature lines are specified to a certain elevation.

01:40

So we're going to go ahead and click "OK".

01:43

And then we are going to select the two feature lines that we want to create our surface from and hit "Enter",

01:49

and then you'll see that we now have a surface in here and then we have our existing surface.

01:55

So now that we have two surfaces, we can create a TIN volume surface.

01:59

So what we're going to go ahead and do is we're going to go back to Surfaces, we're going to right click and click Create Surface again.

02:05

Up in the type, we've only been creating TIN surfaces,

02:08

if you dropdown, you can see that you can create a grid surface, a grid volume surface, and a TIN volume surface.

02:15

So we have two TIN surfaces, so we want to create a TIN volume surface.

02:19

And so we're going to call this surface Vol, and then we are going to leave it as a contour 2' and 10' background,

02:29

and now we get into the specifics of a TIN volume surface.

02:33

We have the base surface and the comparison surface.

02:36

So we know that our base surface what we want to base the amount of work taking place is our EG surface, that's our existing ground.

02:44

And then what we want to compare it to is the work that's going to be taking place, so we're going to compare it to our work surface.

02:50

So we're going to click "OK".

02:51

If you had cut and fill factors, so if you had expansion for the amount of cut that was coming out,

02:58

or you had a compaction of the amount of fill that's going in, you could implement cut and fill factors.

03:05

I'm going to leave them as 1, so I'm going to go ahead and click "OK".

03:09

And so what you see is this surface here is our TIN volume surface.

03:14

And so that TIN volume surface can be analyzed by going to it and right clicking and going to Surface Properties and looking at the statistics,

03:23

and you can dropdown volume and find out all of this information,

03:27

the cut volumes, the fill volumes, the net cut, the net fill, and that kind of information.

03:32

But you can also look at it by going to analyze and looking at the volume dashboard,

03:37

and adding in our TIN volume surface and selecting Vol and clicking "OK".

03:42

And what this does is it brings up a table of all that information as well.

03:46

It gives you your 2D area, your cut, your fill, your net adjusted.

03:51

So it lets you know basically do you have more fill or do you have more cut,

03:56

and this is telling us that our job is weighted more towards fill and you can see that information in a net graph.

04:05

We pretty much have all fill, which is the green.

04:08

You have red for cut and green for fill.

04:11

So this lets you kind of visualize what is going on in your TIN volume surface.

04:17

Now, if your TIN volume surface is a little outside of the areas that you want to display,

04:28

like where I know that the feature line that we implemented right here was an outer boundary of that volume surface,

04:38

then I can go ahead and I can go into my Volume Surface, go to Definitions, go to Boundaries,

04:43

and that's the only thing you can add to a TIN volume surface is a boundary.

04:47

I'm going to go ahead and add, I'm going to select an outer boundary and I'm going to select it and I'm going to call it feat.

04:55

And then I'm going to go ahead and say "OK".

04:59

And then I'm going to select my feature line and now you can see that feature line boundary is selected.

05:05

And if I go and I select this, now you can see that curve here is displayed as my volume surface.

05:13

And if there was some extra work taking place here, that would be also shown inside of my volumes dashboard.

05:20

So these numbers might be different based on the boundary that I apply to my volume service.