Error with creating isochrones

openrouteservice isochrones
1

Hi there,

I need to calculate isochrones from a shapefile with multiple points (not a multipoint shape file, I was smart enough not do use that), and it worked until I edited two point in the file and added a few points. Not the error log looks like this:

“Traceback (most recent call last):
File “/Users/cnaehle/Library/Application Support/QGIS/QGIS3/profiles/default/python/plugins/ORStools/proc/isochrones_layer_proc.py”, line 127, in processAlgorithm
for locations, id_value in self.get_sorted_feature_parameters(source, id_field_name):
File “/Users/cnaehle/Library/Application Support/QGIS/QGIS3/profiles/default/python/plugins/ORStools/proc/isochrones_layer_proc.py”, line 193, in get_sorted_feature_parameters
x_point = x_former.transform(feat.geometry().asPoint())
ValueError: Null geometry cannot be converted to a point.
Execution failed after 0.04 Sekunden”

Any suggestions? I really wouldn’t want to recreate all 150 points manually…

Regards

Philip

2

Hey,

without the input data, finding the cause for these kinds of issues is just poking around in the fog.
However, there’s a few reasons this might happen even if your input data is “correct”:

  • layer was still in edit mode
  • points had no geometry after edits
  • invalid geometry (however that may come to be…)

Best regards

3

The answer is in the error message:

You have a row in your shapefile that may or may not have attributes, but does not have a geometry. Either remove that row or add a geometry to it. Shouldn’t be too hard to find using QGis.

4

Thanks a lot!

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