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Question

Where can I find the records that were dropped because they snapped into a single point in snapper

  • January 23, 2018
  • 6 replies
  • 22 views
L

I have been running a script that uses snapper and get the following line in the log:

2018-01-23 08:08:01| 42.7| 0.0|WARN |Snapper(SnappingFactory): Processed 83703 feature(s). 10930 were snapped, 72770 were untouched, and 3 were dropped because they snapped into a single point

I have tried to find where FME lists the 3 dropped records, but have been unable to. Snapper only has Snapped and Untouched as output so I can't just add an inspector to it.

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6 replies

redgeographics
Celebrity
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  • redgeographicsCelebrity
  • Celebrity
  • 3703 replies
  • January 23, 2018

If you really want to see them you could use a ChangeDetector to compare the data before and after the Snapper.

FME rocks! \m/
L

Thank You. I was hoping for a log file that I couldn't find, but this will work.

erik_jan
Contributor
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  • erik_janContributor
  • Contributor
  • 2179 replies
  • January 23, 2018

It would make a great idea to add an output port for the "Dropped features".

I would vote for that.

jdh
Contributor
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  • jdhContributor
  • Contributor
  • 2002 replies
  • January 23, 2018

If you really want to see them you could use a ChangeDetector to compare the data before and after the Snapper.

Agreed, but it would have to be on a key attribute only, because there will be a lot of geometric changes due to the snapping.
fmelizard
Safer
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  • fmelizardSafer
  • Safer
  • 3719 replies
  • January 23, 2018

Hi @linasvebeliunas, the Snapper in our FME 2018 betas has a Collapsed port. See the documentation for more information. 

If a line or area feature snaps down to a single location, it will be output as a Point geometry, through the Collapsed port.

erik_jan
Contributor
Forum|alt.badge.img+22
  • erik_janContributor
  • Contributor
  • 2179 replies
  • January 23, 2018

Hi @linasvebeliunas, the Snapper in our FME 2018 betas has a Collapsed port. See the documentation for more information. 

If a line or area feature snaps down to a single location, it will be output as a Point geometry, through the Collapsed port.

And again Safe is one (beta) step ahead of us.

 

 

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