I have a 3D stream feature class. Each vertex has an elevation representing water surface elevation for a 100 year flood. I want to create a new point feature class at the inflection points along the stream profile, where elevation changes by 1ft. Here is my stream in profile view and some examples of where I want to create points: My idea is to store the starting value then look at the next vertex, if less than 0.5, skip and move onto the next vertex. Continue this till I hit a vertex that is 0.5 or greater from the starting point. Then create a point at this vertex. Then, move to the next vertex and compare with the last created point. I'm pretty new to FME, can this be done? Thanks!

Question

How to create points where elevation changes by 0.5 feet along 3D stream feature class?

Forum|Forum|5 years ago
October 5, 2020
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tigerwoulds
4 replies

I have a 3D stream feature class. Each vertex has an elevation representing water surface elevation for a 100 year flood. I want to create a new point feature class at the inflection points along the stream profile, where elevation changes by 1ft.

Here is my stream in profile view and some examples of where I want to create points: StreamInflectionPoints

My idea is to store the starting value then look at the next vertex, if less than 0.5, skip and move onto the next vertex. Continue this till I hit a vertex that is 0.5 or greater from the starting point. Then create a point at this vertex. Then, move to the next vertex and compare with the last created point.

I'm pretty new to FME, can this be done? Thanks!

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