Elevation distribution within an defined area

[autoMick]

Hi, I'm feeling pretty rusty with C3D at the moment and just can't work this one out.

I have a high resolution TIN surface and I have defined areas (closed polygons) scattered around on the surface. I would like to be able calculate the area of each polygon that falls within defined elevation ranges and export this information in to excel. Ideally in a form like this:

I thought I might be able to convert the polygons to Parcels and find a suitable report... but maybe I'm barking up the wrong tree... Has anyone got any suggestions?

Thanks

- Mick

[lim.wendy]

Hi Mick, 

Just to make sure I understand you correctly, do you mean to get the 3D surface area based on the defined elevation range from the polygons in the drawing? If it is, I can't think of an automated workflow , the one which I can think of is to create "dummy" surfaces which represent each polygon and clip them using the boundary of your polygons. 

Then copy the 2D elevation banding analysis from the source surface and paste to each surfaces. Then add Elevation Tables for each surfaces. Not ideal though...

 

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[autoMick]

Hi Wendy,

To report 2D surface area is all I need. What you've demonstrated is basically what I want to achieve, but I have a lot of polygons so it's impractical to change the boundary for each one to report on each part of the surface separately. I was hoping that there would be some sort of 'Parcels Elevation Analysis' report that simply reported the 2D area for multiple parcels within each elevation range? 

Another strategy I was considering was to somehow do a parcels volume analysis, then divide the volume by the average depth to give 2D area. Don't know how to do this either, but maybe it will spark some ideas?

Thanks

- Mick

[Joe-Bouza]

Would the volumes dashboard help?

[lim.wendy]

Hi Mick!

Good day to you

Thank you for submitting your question in our discussion forums. Just wanted to check with you for an
update on this issue. Please let me know if you require further assistance.
Your understanding and support is greatly appreciated.
Have a great day!

[sboon]

I've been fooling around with this for a few hours, trying to find a solution.  I thought that Joe's idea would work - I can create a dummy surface at elevation zero, then use the dashboard to create a volume surface with multiple bounded areas.  My plan was to use an elevation analysis display style and a legend that shows the areas.  The problem is that using the bounded area in the dashboard doesn't affect the boundary of the volume surface, so the table doesn't change.

I've also been experimenting with extracting the elevation analysis hatches across the entire surface and then trying to filter them so that I could select within a polygon and get a cumulative area somehow. It works if I select a few hatches, but the properties dialog stops working if I select too many.

Frustrating - it seems like the solution is close but I cannot figure it out.

Steve
Please use the Accept as Solution or Kudo buttons when appropriate

[lim.wendy]

Yea, Steve is right. The area for Volume dashbaord would not change and it is fixated to the polygon's area, but I do think that Mick suggestion or feedback is great. 

I would suggest to please navigate to the link below to submit this feedback.  It provides important feedback on features and input on capabilities that you value. In addition, this will go to the project manager of the product and he in turn will bring this to the quarterly product review /discussion with the development team for further consideration on top of these efforts above.  This is a great tool and can help build further momentum in pushing this request through. 

Feedback Link:  http://usa.autodesk.com/adsk/servlet/index?siteID=123112&id=1109794

We’re listening to the voice of our customers, so we can make the Autodesk software even better!

[sboon]

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Another thought. A grid volume surface would be less precise but the extracted objects might be easier to analyze. Count the number of ‎squares in each color that fall within the boundary and you have the areas.  

Sent from my BlackBerry 10 smartphone on the Bell network.

[Joe-Bouza]

We’re listening to the voice of our customers, so we can make the Autodesk software even better!

SUPER!

[autoMick]

Thanks Wendy, I've submitted this suggestion - hopefully it gets included sometime.

Any other suggestions in the meantime? I still haven't resolved my issue.

Maybe it is possible in Map3D?

Thanks

- Mick