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Question

Multiple Clipper Problem


danamos
Contributor
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Hi,

I'm having problems using the Clipper transformer with 19 las point clouds as the input / clipee and a MapInfo tab file as the clipper, with the output being written as LAZ files. The workspace works fine if I just run it in isolation, as shown below:

However, in addition to the output from the Inside port of the "OSTile_Clipper" being written as a series of LAZ files, I also want to put this output this through a 2nd clipper (ControlSurfaceClipper) as the Clippee and have it clipped against another MapInfo tab file.

On enabling the ControlSurfaceClipper tranformer and it's associated Clipper input port, all outputs from the 1st transformer are now output via the "Outside" port and no data is output, as shown below:

How do I get around this, so when all transformers & writers are enabled, the data from the 1st Clipper transformer is output via the Inside port?

Below are the parameters for each clipper:

Thanks in advance!

3 replies

redgeographics
Celebrity
Forum|alt.badge.img+50

So activating the 2nd Clipper changes the results of the 1st Clipper? That's really odd!

If you disable it again do you get your correct results again?


danamos
Contributor
Forum|alt.badge.img+3
  • Author
  • Contributor
  • August 20, 2018
redgeographics wrote:

So activating the 2nd Clipper changes the results of the 1st Clipper? That's really odd!

If you disable it again do you get your correct results again?

That's correct yes, it is odd - completely unexpected!

Yes @redgeographics disabling the 2nd clipper again gives correct results from the 1st clipper again.

I've also tried putting the input las files directly into each clipper, but that does'nt work when both clippers are enabled either as the below screenshots show.... only the an individually enabled clipper seems to output as expected...

Both Clippers Enabled... OS Tile Clipper, Inside Port Output Correct (19) / No Control Surface Output From Inside Port / 19 Files sent to Outside Port - Incorrect

Just Control Surface Clipper Enabled... Output from Inside Port Correct (2)

Just OS Tile Clipper Enabled... Output from Inside Port Correct (19)


fmelizard
Safer
Forum|alt.badge.img+18
  • Safer
  • August 21, 2018
danamos wrote:

That's correct yes, it is odd - completely unexpected!

Yes @redgeographics disabling the 2nd clipper again gives correct results from the 1st clipper again.

I've also tried putting the input las files directly into each clipper, but that does'nt work when both clippers are enabled either as the below screenshots show.... only the an individually enabled clipper seems to output as expected...

Both Clippers Enabled... OS Tile Clipper, Inside Port Output Correct (19) / No Control Surface Output From Inside Port / 19 Files sent to Outside Port - Incorrect

Just Control Surface Clipper Enabled... Output from Inside Port Correct (2)

Just OS Tile Clipper Enabled... Output from Inside Port Correct (19)

Please do send the sample data and workspace in to support -- does sound like something strange is going on here.

 

 


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