fmeline
I need your help to perform the below process in FME.
I have two layers: Pole Data (Point) and Cable (Line).
Cable has no ID.
I want to keep the Cable which is going through the Pole.
Then make the cable as Single segment between two poles.
Then I want to update the Start ID and End ID (Pole ID) to each segment (Cable layer).
Please share the design of workbench and what parameters I will use in each transformer.
There is a really simple method for doing this. The steps are as follows:
Use a MeasureGenerator to add a measure to your line (ensure your coordinate system units are metres). Note, you will want to do this prior to snipping the line into 20m segments.
Use the IterativeSnipper transformer to chop the line into 20m segments. All of the segments will have the measure associated with them. Note, you may have to download this transformer from the FME Store under the Linear Referencing category. It's a free download as of FME 2013, I think.
Use a measure extractor to extract the measure of the first vertex. This is specified by Index 0. Store the measure in an attribute called something like "start_measure". Use the same source measure name that you specified in the MeasureGenerator.
Use another MeasureExtractor to extract the measure of the last vertex. Same as above, but use -1 as the index.
The full workspace looks like this:
(note, I used a creator transformer to create a 500m line, but this will work on any polyline).
Also, you might want to have a look at this question I asked which is similar to what you want to do.
I agree with Barbarossa that accessing the power of the da module would be beneficial. Here is very clean scripting approach:
import arcpy
fc = r'C:\Users\OWNER\Documents\ArcGIS\Default.gdb\samplePolyline'
fields = ['x1','x2','y1','y2']
# Add fields to your FC
for field in fields:
arcpy.AddField_management(fc,str(field),"DOUBLE")
with arcpy.da.UpdateCursor(fc, ('x1','x2','y1','y2', "SHAPE@")) as cursor:
for row in cursor:
row[0] = row[4].firstPoint.X
row[1] = row[4].lastPoint.X
row[2] = row[4].firstPoint.Y
row[3] = row[4].lastPoint.Y
cursor.updateRow(row)
Best Answer
I assume that your points are on line, and cables are linestrings
Lines->Linejoiner (by cable type? and using only end point) (creates longest possible lines) -> PointOnLineOverlay Points -> PointOnLineOverlay (this cuts all lines at points.)
Then Lines from PointOverLay -> CoordinateExtractor (use 0 index for start points and -1 to last endpoint) -> Create points, and use SpatialRelator or FeatureMerger to merge start and endpoint with points