# Surface Area method for portions of segment or from landmarks

**URL:** https://discourse.slicer.org/t/surface-area-method-for-portions-of-segment-or-from-landmarks/22645
**Category:** Support
**Created:** [March 22, 2022, 8:41pm UTC](https://discourse.slicer.org/t/surface-area-method-for-portions-of-segment-or-from-landmarks/22645 "2022-03-22T20:41:31Z")
**Posts on this page:** 1
**Showing post:** 4

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### Author: ![Rosalee\_Elting](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/rosalee_elting/32/10138_2.png) [@Rosalee\_Elting](https://discourse.slicer.org/u/Rosalee_Elting)
#### Post date: [March 22, 2022, 11:20pm UTC](https://discourse.slicer.org/t/surface-area-method-for-portions-of-segment-or-from-landmarks/22645/4 "2022-03-22T23:20:53Z")

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@muratmaga I did find a potential solution to my own question for **3** using the second code chunk that Andras gave in [this link](https://discourse.slicer.org/t/how-can-i-calculate-an-area-on-a-ct-image-i-can-calculate-volumes-mm-3-but-not-areas-mm-2/1549/4).

Attached is what it looks like it’s measuring, which is within the closed curve, but is unfortunately the under side of the bill.

 ![measured area](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/3/0/301b03e0661f8c4b5c7fbc611d817214bbf16f8c.png)  
It also seems like it’s adding a “cap” here, to the end of the bill, which might resolve when we’re measuring the dorsal area  
 ![included edge.PNG](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/0/c/0c8fa72547cd5a69e852d2a22f0e1481e5895131.jpeg)  
Is there a way to change which surface of the segment it is measuring. Has there has been an updated method to do this beyond the Python console?

Thanks!

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