High Points and Low Points along a line

MatthewGerber1 — Fri, 10 Jun 2011 11:53:34 GMT

Hi All,

I am looking for a tool or scirpt that would identify all the high points and low points along a 3D line. In other words all the peaks and gullies.

I have been able to get a min/max z value through the standard arc geometry cal, but i want to find more than the one high and low point. Also as the elevation data is not real flash, customising it to have a 0.5m elevation change threshold before identifying the next high/low point would be even better.

The other thought is that I have extracted elevation values out of the line at 10m intervals. it looks like the following example

eg.

M=Measure length attribute
Z = Elevation attribute

1. M=0, Z=315
2. M=10, Z=316
3. M=20, Z=312
4. M=30, Z=320

is there a way for scirpt to search though and event table an pull out the high points and the lows?

Thanks
Matt

Re: High Points and Low Points along a line

KimOllivier — Mon, 04 Jul 2011 02:52:16 GMT

In Workstation there is a lattice command called HIGHLOW which does what you want in two dimensions. One too many?

You might be able to get inspiration from this. They discuss local maxima or minima using filters.
There must be a Python script somewhere.

topic High Points and Low Points along a line in 3D Questions

High Points and Low Points along a line

Re: High Points and Low Points along a line