VOLUME CALCS

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BURFORD

VOLUME CALCS

Post by BURFORD » Wed Oct 13, 2004 3:49 am

WHAT UNITS IS THE TEXT VOL REPORT?
I DREW IN FEET
IS POS VOL CUT OR FILL

Area Positive Volume Negative Volume Net Volume
---- --------------- --------------- ----------
34576.355 -11421.839 23154.517

Glen Cameron
Posts: 1395
Joined: Fri Nov 08, 2002 12:18 pm
Location: Corbeil, Ontario, Canada
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Volume units

Post by Glen Cameron » Wed Oct 13, 2004 4:39 am

By default, the units are the same as the drawing. So if you are working in Feet - then the volume is in cubic feet. If working in meters then the volume is cubic meters. You can change this so they are reported in cubic yards, or any other units, if desired. Go to the MsModelling menu -> Configuration Settings -> Units -> then enter in a Volume Multiplier and label.

Positive/Negative vs. Cut/Fill. This is a hard one to answer - but only because you are comparing 2 surfaces and you can specify Surface1-Surface2 or Surface2-Surface1.

If Surface1 is higher than Surface2, then the Positive Volume is the amount of cut from Surface1 to go down to Surface2.

If Surface1 is lower than Surface2, then the Positive Volume is the amount of fill from Surface1 to go up to Surface2.

Cheers,
Glen W. Cameron, C.E.T.
City of North Bay, Ontario

Richard Sands

Volumes

Post by Richard Sands » Wed Oct 13, 2004 11:17 am

When working volumes the rule is.
PROPOSED - (Minus) EXISTING yields the follwing results.
Fill Volumes are +ve and Cut Volumes are -ve.
This is explained in the Quicksurf manual very well, but I expect its out of print.
regards
Richard

Glen Cameron
Posts: 1395
Joined: Fri Nov 08, 2002 12:18 pm
Location: Corbeil, Ontario, Canada
Contact:

Volumes

Post by Glen Cameron » Wed Oct 13, 2004 11:36 am

As taken directly from our Help file:

The volume report produced looks similar to the following:

VOLUMES:
Reported in Cu.Yds.
Using 0.037037 cubic units/Cu.Yds.

Area______Positive Volume____Negative Volume____Net Volume

1__________15025.1__________14215.5_____________809.6

2__________10215.3__________9812.4______________402.9

3__________982.5____________3402.5_____________-2420.0

Total_______26222.9__________27430.4____________-1207.5

For each area three numbers are reported:

Positive Volume: The positive volume within the area polygon.
Negative Volume: The negative volume within the area polygon.
Net Volume: The net sum of volumes within the area polygon.

A Total Positive Volume is reported representing the total positive volume of the entire surface. A Total Negative Volume is reported representing the total negative volume for the entire surface. Positive volumes represent areas with Z values greater than zero and negative volumes represent areas with Z values less than zero.

Which are cut and which are fill? It depends on the order of subtraction. This depends on which surface was the first surface and which was the second surface in the Area Volume dialog box. If you have an existing surface (E) and a proposed surface (P) and enter the proposed surface as the first surface and the existing surface as the second surface, the resulting thickness surface (P-E) is positive for fills and negative for cuts.


Cheers,
Glen W. Cameron, C.E.T.
City of North Bay, Ontario

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