For Example
C3D 2013
1.55 in C3D rounds to 1.5
in every other program it rounds to 1.6
now 1.551 rounds to 1.6
and 1.549 rounds to 1.5
is there a way to make it round 1.55 up like normal rounding
in everything else I've tried?
No bigge for me, I have a tech asking me this.
Suggestions?
TIA,
Bo
Bo,
Depending on what it is the rounding is being applied to go to:
Settings Tab of Toolspace>Rt. Click on Drawing Name>Drawing Settings>Ambient Settings Tab>
Property, Elevation Area Volume etc. There's a setting for "Rounding", per category, set them to "round normal".
Most of us probably learned the "round half up" method in elementary school, where values ending in 5 are always rounded up. This method creates a bias in your calculations because values which appear to be exactly on the halfway point always get pushed to one direction. The other method which has become popular more recently is the "round half to even" rule, where numbers ending in 5 round up or down to the nearest even value. Theoretically this removes the bias.
From the help file.
Rounding
Specifies how numbers are rounded up or down to the number of decimal places specified in Precision:
Note - AutoCAD is limited to 8 displayed decimal places. However, the actual precision beyond the display capability will still effect rounding. For example, 25.12500000001 would round to 25.13 with two place precision labeling.
Still an issue in C3D 2017.
A municipality that marked up a submitted plat has noted a discrepancy between our lot closure document and the curve table.
Here is the Parcel Properties - Notice the length of the curve in Segment 3
and here is the same curve in the Curve Table in the drawing - both are automatically generated.
What I would expect to see is the Table reflect the length rounded to 2 places as 19.56'.
The white multi-leader is to point out to any future person that an overlay will exist that has a text mask to make sure that the Table and the Parcel Properties that was used to generate lot closures match.
It is a crappy way to address the issue. The rounding is set to normal. If I change to round up, then I have many more curve length values that would not match. As it is, right now I only have 3 that I have to fudge for appearances sake.
If anyone has a solution I would appreciate hearing it.
Thanks,
Marty.
Hi Jeff,
You are correct. I changed the drawing properties to show length at 2 places and it does round the parcel properties down to be consistent with the parcel closure report.
Thanks!
This solves the differences in reporting, but C3D should consistently report numbers no matter the significant digits shown.
Marty.
This is a big issue for surveys and as you know it has exisited since the begining. Our big issue is getting metes and bounds to sum correctly and the round half up is a cr_p shoot to remove the bias just as rounding normal would be.
Personally I wish we could select a label and change the rounding method with a right-click menu or ribbon switch. No rounding, round normal, round up and round down. Maybe it would be better to asssign this property to the segment vs the label for reporting....
John Mayo
There is a right click that allows you to change the rounding. Select the label, right click, Edit Label Text, select the piece you want to change the rounding for, change the rounding, hit the silly little unlabeled white arrow, hit OK.
It's not quite as simple as you want but it gets you what you need (I think).
That's a very valid point that I don't have a solution for.
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