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
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.
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".
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
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.
