Trimble Business Center

There was a change I had to make to one of my surfaces so i made a copy to keep as the original and made the changes that i needed to make. I ran earthwork report comparing the two surfaces to see how much fill id need and noticed that my cut and fill areas were high. If i manually create linework in the area that needs fill im getting around 80yd2 however the report is showing 4,000 yd² for the cut and fill "Area". there is very little cut so i dont really understand what is going on here. Ive attached an image of the isopach showing where the fill area is at and the earthwork results

Does it give you this same info when you choose the properties of the C/F Map?

Yes I checked and it is showing the same amount

Eric

Can you send me the Project and I will take a look for you - it is impossible to tell from a screen shot what is happening here (alan_sharp@rockpilesolutions.com)

Thanks

Alan

Eric

Thanks for the data - if I run a Surface to Surface Report in 5.21 I am getting 39.7 yd3 between the two surfaces. If I constrain it to a rectangle boundary around the area where the differences are I get the same result so I am not sure where you are getting thenumbers you are showing.

The Isopach in the file you sent me - if you look at its properties, it shows the following (without me touching anything

The volume is 40.8yd3

Maybe you are reading the Area of Cut and Area of Fill values to get your 4000 number?

The area of the Cut and Fill is ~20' x 32' ie ~600 ft2 - however I assume that over the entire site there are some areas where the Cut or Fill is not 0 but 0.01 or something above our zero cut fill tolerance, which is why these as/reas are not 600 ish, but despite that the volumes look right to me.

I am comparing the Surfaces that are in your Isopach ARCH SG 200313 (Initial) and 19248 SG 200416 - these appear to be what you are computing from.

I am running v5.21 of TBC - It may be a Version issue possible - so I would need to know what version you are looking at to go any further here - I left you a VM to call me back on +1 720 323 0481 so we could chat through it in case I am missing something here.

Alan

We looked into the Areas issue that we discussed and found that the Area of Cut and Area of Fill and Area of Net Zero on all but flat or zero difference Isopachs was cutting off at a point that increased the area of Cut and Fill more than it should have. We agree and as a result have changed to cut off point so that Area of Cut and Fill in this project is much smaller.

Thanks for raising the question

Alan