Hi! I would like to extract the middle coordinate of a three point arc. With the ArcPropertyExtractor I only get start, end and center point coordinates. The mid point does not necessarily be in the middle of the arc, but helps to describe it, together with the start and end point.
Thanks a lot!!
Best answer by takashi
Hi @schulthesskatha, if the arc was made of three points, a PythonCaller with this script extracts the coordinates of the mid-point. Otherwise, the method "getMidPoint()" returns interpolated half way point.
# PythonCaller Script Example
import fmeobjects
def extractMidPointOfArc(feature):
arc = feature.getGeometry()
if isinstance(arc, fmeobjects.FMEArc):
coord = arc.getMidPoint().getXYZ()
feature.setAttribute('_x', coord[0])
feature.setAttribute('_y', coord[1])
See the Python FME Objects API Reference (fmeobjects.FMEArc class) to learn more.
+11Hi,
Have you tried snipper with vertex percentage 50-50 option along with coordinate extractor?
+18Not sure, but would the CoordinateExtractor with index 1 work?
Index 0 should be start and index 2 should be end point.
Hi,
Have you tried snipper with vertex percentage 50-50 option along with coordinate extractor?
Not sure, but would the CoordinateExtractor with index 1 work?
Index 0 should be start and index 2 should be end point.
Hi,
Have you tried snipper with vertex percentage 50-50 option along with coordinate extractor?
Hi Takashi. You are right. There are indeed many points describing an arc, also the one exact halfway. In the below example (highligthed in yellow and illustrated in the arc), it is not the midpoint exact halfway, but somewhere between start and end point. Somehow, fme gets this coordinate from the incoming data, but I cannot find, where to extract this information from the IFMEArc geometry. Is this at all possible?
Please provide example to understand better
example-fme.png
Hi @schulthesskatha, if the arc was made of three points, a PythonCaller with this script extracts the coordinates of the mid-point. Otherwise, the method "getMidPoint()" returns interpolated half way point.
# PythonCaller Script Example
import fmeobjects
def extractMidPointOfArc(feature):
arc = feature.getGeometry()
if isinstance(arc, fmeobjects.FMEArc):
coord = arc.getMidPoint().getXYZ()
feature.setAttribute('_x', coord[0])
feature.setAttribute('_y', coord[1])
See the Python FME Objects API Reference (fmeobjects.FMEArc class) to learn more.
Hi @schulthesskatha, if the arc was made of three points, a PythonCaller with this script extracts the coordinates of the mid-point. Otherwise, the method "getMidPoint()" returns interpolated half way point.
# PythonCaller Script Example
import fmeobjects
def extractMidPointOfArc(feature):
arc = feature.getGeometry()
if isinstance(arc, fmeobjects.FMEArc):
coord = arc.getMidPoint().getXYZ()
feature.setAttribute('_x', coord[0])
feature.setAttribute('_y', coord[1])
See the Python FME Objects API Reference (fmeobjects.FMEArc class) to learn more.
Enter your E-mail address. We'll send you an e-mail with instructions to reset your password.
