# Drawing a surface boundary around scattered points
**URL:** https://discourse.julialang.org/t/drawing-a-surface-boundary-around-scattered-points/76785
**Category:** General Usage
**Tags:** question, plotting
**Created:** [February 20, 2022, 6:05am UTC](https://discourse.julialang.org/t/drawing-a-surface-boundary-around-scattered-points/76785 "2022-02-20T06:05:07Z")
**Posts on this page:** 4
**Page:** 1
### Author:  [@gojira](https://discourse.julialang.org/u/gojira)
#### Post date: [February 20, 2022, 6:05am UTC](https://discourse.julialang.org/t/drawing-a-surface-boundary-around-scattered-points/76785/1 "2022-02-20T06:05:07Z")
I was wondering if there was a way to collect all of the boundary points to a 3D scatter plot? All of the points are generated randomly. I guess more specifically if I have a structure that has a field with 100 data points how could I collect the boundary points from this field?
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### Author:  [@vettert](https://discourse.julialang.org/u/vettert)
#### Post date: [February 20, 2022, 6:22am UTC](https://discourse.julialang.org/t/drawing-a-surface-boundary-around-scattered-points/76785/2 "2022-02-20T06:22:36Z")
Boundary can mean many things. Are you looking for the points on the convex hull of this group of points?
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### Author:  [@gojira](https://discourse.julialang.org/u/gojira)
#### Post date: [February 20, 2022, 6:31am UTC](https://discourse.julialang.org/t/drawing-a-surface-boundary-around-scattered-points/76785/3 "2022-02-20T06:31:13Z")
Thank you for your reply! Yes, I do mean the convex boundary.
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### Author:  [@vettert](https://discourse.julialang.org/u/vettert)
#### Post date: [February 20, 2022, 7:43am UTC](https://discourse.julialang.org/t/drawing-a-surface-boundary-around-scattered-points/76785/4 "2022-02-20T07:43:40Z")
This could help:
[https://juliareach.github.io/LazySets.jl/v1.11/man/convex\_hulls.html#Higher-dimensional-convex-hull-1](https://juliareach.github.io/LazySets.jl/v1.11/man/convex_hulls.html#Higher-dimensional-convex-hull-1)
You could also use most triangulation methods for this; for example Triangulate.jl
(but check whether licensing constraints are fine for your purpose)