topic Re: Split or Clip 3D polyline at specified z-value in 3D Questions

Split or Clip 3D polyline at specified z-value

ThomasHelin — Mon, 04 Nov 2013 16:16:21 GMT

Hi
I have radar tracks of flightpaths as shapefiles (exported from a CAD-application) and I need to select only the part below a certain height. Anyone out there having some tips or tricks how to do this?
Rgds,
Thomas

Re: Split or Clip 3D polyline at specified z-value

XanderBakker — Wed, 06 Nov 2013 07:12:08 GMT

Hi
I have radar tracks of flightpaths as shapefiles (exported from a CAD-application) and I need to select only the part below a certain height. Anyone out there having some tips or tricks how to do this?
Rgds,
Thomas

Hi,

Start creating a TIN (Create TIN (3D Analyst)). Use a polygon of the study area, and use the fixed value ("certain height") to create the surface. Use the Intersect 3D Line With Surface (3D Analyst) tool to intersect the flight paths. The result will be the segmented flight paths optionally the points of where the flight path is cut. The output will have two columns SURF_FROM and SURF_TO which will have the same value for all the features except the first and last feature.

In case you use more surfaces this will have more meaning. You can however use the calculate geometry to calculate the Z coordinate of the midpoint of the line segment and select those parts of the line where this value is below the "certain height".

Kind regards,

Xander

Re: Split or Clip 3D polyline at specified z-value

ThomasHelin — Thu, 07 Nov 2013 04:15:17 GMT

Hi Xander
thank you for your tip, I've tried them but no great success, possible because I havn't upgraded from version 10. I'll keep on trying but if you have any comments; please write to me.
Regrads,
Thomas

Re: Split or Clip 3D polyline at specified z-value

XanderBakker — Thu, 07 Nov 2013 05:02:04 GMT

Hi Thomas,

What kind of problems do you walk into? If you can share a small part of your data and the height you're evaluating against, I can have a look and see if this might be version related or data related.

Kind regards,

Xander

Re: Split or Clip 3D polyline at specified z-value

ThomasHelin — Sat, 09 Nov 2013 13:11:01 GMT

Hi Xander
Your explanations and comments were very good, I really appreciate your help.
Kind regards,
Thomas

Re: Split or Clip 3D polyline at specified z-value

XanderBakker — Mon, 11 Nov 2013 05:55:36 GMT

Hi Xander
Your explanations and comments were very good, I really appreciate your help.
Kind regards,
Thomas

For those interested; I attached the explanation of the steps as PDF document.

Kind regards,

Xander

Re: Split or Clip 3D polyline at specified z-value

larryzhang1 — Tue, 12 Nov 2013 10:25:11 GMT

Hi, Xander,

Your answer is really helpful.

Can you help look into the case at http://forums.arcgis.com/threads/94297-Niether-Collada-nor-Sketchup-textures-can-be-imported-into-ArcGIS-10.2 and see if you can provide some advices?

Regards,