Percentage Calculation

[robdyck]

Does anyone know of a way to get an automatic percentage calculation for something like site coverage? I have macros to display the area of the site and footprints of the structures (using polylines), but I also need to show the percentage of coverage. I hate doing this manually because I'm human and I occasionally enter a typo. 

The same thing applies to other parts of a plan, like displaying the percentage of windows on the elevation of a home, or the percentage of cladding types. These are just a few examples of where percentages need to be shown for permitting authorities.

[tommy1]

For the site plan, are you talking about impervious ground coverage?

[robdyck]

41 minutes ago, tommy1 said:

For the site plan, are you talking about impervious ground coverage?

That too. In my area, I need to show percentages for several items:

-building area (as defined by our building code)

-building footprint (as defined by local zoning bylaws)

-impervious site coverage

-glass to wall area ratios on certain elevations (relating to fire codes)

-percentages of finish materials (as required by architectural review boards)

 

and more...

[HumbleChief]

There are macros that will do the arithmetic, and those who know of such things may be willing to help...

[BrownTiger]

I do not have a clue about "as defined by our ..." is. So:

1) Create a [rectangular] polyline " - building area (as defined by our building code)", give it a color, set some sort of fill hash

Create a macro place it in the label to assign some global:

$BuildingArea = owner.area[.round()]

2) Repeat same process with with the "-building footprint (as defined by local zoning bylaws)"

 $BuildingFootprint = ..

3) Repeat same process with with the  -impervious site coverage

 $SiteCoverage = ..

4) Repeat same process with with the $ParcelArea 

 

Now create text field and place a macro

result = "site coverage: "  + ($BuildingArea / $Parcel Area * 100.0).Round(1)

 

etc.

-glass to wall area ratios on certain elevations (relating to fire codes)

Same principle, just done in the elevation view

 

[DRAWZILLA]

Joe Carrick  has a system for all that stuff, check with him,

[para-CAD]

I wonder why CA doesn't make these things as included features in their software? 

[Joe_Carrick]

9 hours ago, para-CAD said:

I wonder why CA doesn't make these things as included features in their software? 

Probably because each jurisdiction has their own set of required calculations.  It almost has to be custom.