Translating a polygon from .poly (Osmosis polygon format)

Hi,

 

 

The VariableSetter / VariableRetriever can be used to add the polygon ID to each point. If the polygon ID always occurs at the first line in the block of a polygon data lines and also the second column of the ID line is empty, one possible workflow is like this:

 

 

Alternatively a PythonCaller also can be used. For example:

 

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import fmeobjects   class OsmosisPolygonCreator(object):     def __init__(self):         self.polygon_id = None         self.coords = []              def input(self, feature):         x = feature.getAttribute('col0')         y = feature.getAttribute('col1')         if x == 'END':             boundary = fmeobjects.FMELine(self.coords)             polygon = fmeobjects.FMEPolygon(boundary)             feature.setGeometry(polygon)             feature.setAttribute('polygon_id', self.polygon_id)             self.pyoutput(feature)             self.coords = []         elif not y or y == '':             self.polygon_id = x         else:             self.coords.append((float(x), float(y)))              def close(self):         pass

 

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  The results of these 2 ways are almost same, but the 2DPointReplacer seems to round the coordinate value by certain precision. I think the Python script is effective if necessary to keep precision.

 

 

Takashi

Hi,

 

 

It's possible to test whether the attribute value is a number of a decimal point or not: Left Value: col0 Operator: Matches Regex Right Value (Regular expression): [0-9]*\\.[0-9]*   In addition, Multiple Feature Attribute Support functionality of the AttributeCreator (FME 2013 SP2) could be also used instead of the VariableSetter / VariableRetriever. There are several ways to do same thing in many cases :-)

 

Takashi