TELEMAC-MASCARET Forum: Creating a closed line from a point set (1/1)

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TOPIC: Creating a closed line from a point set

Creating a closed line from a point set 9 years 7 months ago #16500

vknook	I want to create a mesh to run a model using ARTEMIS for a harbor. I need a polygon for the boundaries, but only have a point set (.xyz file) of the shoreline. Is there any way I can create a logical polygon out of this point set? I have included the .xyz file.
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Creating a closed line from a point set 9 years 7 months ago #16503

GiffordMiears_OSU
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Junior Boarder
Posts: 36
Thank you received: 13

Hello vknook,

Please see the attached potential workaround to convert an xyz boundary point file into a closed 2D or 3D poly:

File Attachment:

File Name: closed_poly_from_xyz_workaround.pdf
File Size: 179 KB

Please note that this assumes your boundary xyz points are in sequential order (clockwise or counterclockwise). There may be an official way to achieve this, however, this is how I would approach your request.

Cheers,
Chris

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The following user(s) said Thank You: vknook

Creating a closed line from a point set 9 years 7 months ago #16507

vknook	Thanks a lot! That totally helped. Note for a next user: You'll have to change the first number in line 16 (just before all the coordinates start) as this seems to dictate the amount of points that will be part of the line. If there are more coordinates, a second line will be created instead of one closed polygon.
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Creating a closed line from a point set 9 years 7 months ago #16515

Serrer OFFLINE Moderator Posts: 720 Thank you received: 304	Hi, The i2s/i3s file format is described in Appendix A of the Blue Kenue reference manual. Unfortunately it fails to mention that a *closed line (polygon)* is defined by having *identical first and last points.* My apologies for this oversight. Martin
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