Get dimension style precision?!

Hi guys!

I am wondering if anyone knows a way to pull a dimension style’s ‘Precision’ Settings? I am created a QA family to check the precision of our dimension styles against an ‘acceptable’ list. Some of our users have been rounding dimensions…

I can get the dim styles to check against project settings but the project settings are often changing on individual dim styles. I cant find a way to pull this information, Im hoping someone has a way!


That too is on my to-do list. I believe it’s been done but I don’t know yet how they did it.

There is a BuiltInParameter Enumeration for DIM_STYLE_LINEAR_UNITS on RevitAPIDocs that looks promising but I’m still new to the API so not sure yet how to utilize it.

This may help:

See below for another implementation of what Jacob has linked to above:

import clr
from Autodesk.Revit.DB import FilteredElementCollector, DimensionType, BuiltInParameter

from RevitServices.Persistence import DocumentManager

doc = DocumentManager.Instance.CurrentDBDocument
dim_styles = FilteredElementCollector(doc)\
bip = BuiltInParameter.DIM_STYLE_LINEAR_UNITS
is_default = []
for dim in dim_styles:
	format_ops = dim.GetUnitsFormatOptions()
	if format_ops.UseDefault:

OUT = zip(dim_styles, is_default)

This gets all dimension styles (DimensionType objects) in the current document and returns the DimensionType and whether or not is uses default formatting (boolean).

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Rethinking what I want to do here (which is probably different from the OP).

Instead of determining which styles are different from the project settings, what I really want to know is which displayed dimension strings are different from the actual dimensional values.

Luckily, @john_pierson has us hooked up in Rhythm for exactly this sort of thing! Thanks John!

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Speaking of this workflow, @john_pierson

I’m using Dimensions.DisplayValueString and comparing it to Dimensions.ValueString which works great until the units of the dimension are set to something other than feet/inch. If, for example, the dimension style is set to display inches my comparison comes back as false (not equal) even though it’s technically the same dimension (e.g., 4’-0" vs 48").

Any thoughts on that?

Right now I’m planning on parsing out the numerical value of the dimension from Dimensions.ValueString so I can compare that to the Dimension.Value output.

Hmmmmmm. I think spring nodes has a node to convert a number to a string representation. If not, I bet the Humanizer toolkit has some info for it.

AU this week, I can take a look when I get back in office.

Yep. Enjoy!

I don’t know the Humanizer toolkit. I’ll have to check it out.

Thanks for the reply guys! actually what you are describing is basically what I am trying to do! Im not trying to compare it to project settings but, as you say, compare shown values vs. actual values to make sure precision is correct/not rounded.

I am not familiar with Humanizer either, I will have to look at that.