I have an Esri ArcGIS Binary Grid and a line shapefile. The shapefile was produced by the Surface Draper transformer, so it is 3D and has Z values at the verticies from the same Grid. The Z values that I would like to generate at a 10m interval can be output to a csv, instead of being applied to the shapefile: that is, I do not require verticies to be created in the shapefile at a 10m interval. Just need the interpolated Z values every `10m down the line. Thanks!
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Hello! I would like to interpolate Z values at a 10 metre interval along lines that appear in a shapefile. Is there a transformer to do this? Thanks!
Best answer by takashi
Hi @mdumka ,
You can use LineDivider from FME Hub to generate 3D points with 10 m interval from the draped 3D line, then extract coordinates (x, y, z) from the 3D points with CoordinateExtractor.
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- Best Answer
Hi @mdumka ,
You can use LineDivider from FME Hub to generate 3D points with 10 m interval from the draped 3D line, then extract coordinates (x, y, z) from the 3D points with CoordinateExtractor.
Hi @Takashi Iijima , that makes sense. I wasn't aware of LineDivider. Once again FME is awesome! Thank you for your kind wisdom and prompt response. Mark
How about a slightly different take on this? Instead of dividing the line on a 10m interval and thereby producing individual lines from each division, we keep the original lines but just add verticies every 10m?
There is a way to reconstruct the original lines and add verticies every 10m. After using LineDivider, use Line Builder to stitch the lines back together (to the original). Then use CoordinateExtractor and Measure Extractor to pull out Z and M (the input shapefile already had Z as described in my original question: I forgot to mention it also has M at the original verticies). CoordinateExtractor and Measure Extractor have to be in 2 separate streams since we only want to produce one list at a time, and since we don't want the 2 lists to multiply each others features. The use FeatureMerger to put the 2 streams back together.
A problem with this approach: the original verticies were lost (except for the first and last verticies). That must be because LineDivider dropped them. Another problem: the measure values are not exactly at exactly 10: they are 9.99461806513725, 19.9892361302353, 29.9838541954888, etc. Not sure why.
Attached is a screengrab of the script. Thanks all! Mark