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Split or Clip 3D polyline at specified z-value

ThomasHelin

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

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Accepted answers

XanderBakker

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

All comments

larryzhang1

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,

XanderBakker

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

FlightPaths.pdf

ThomasHelin

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

XanderBakker

ThomasHelin

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

XanderBakker

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

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