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Contributor
Posts: 36
Registered: ‎05-02-2018

Generate DTM with pusbroom images with Imagine 2018

Hi everyone,

I'm currently trying to build Digital Surface Model (DSM) with Pleiades Tri-Stereo Images (pushbroom sensor). I don't find on the documentation any help to perform this task.
I add on a photogrammetry projet my images with the DIM files, give the interior/exterior orientation and compute Automatic Point Measurement (APM). After that, I did the Block Triangulation and then, I have to generate now the DSM.

 

How to perform this ?
With Tridicon Semi-Global Matching (SGM), I generate the tiles (to get the status Ready), and then, I run the SGM tool with "Run Now" button. But after that, no DSM is added on the photogrammetric project. Why ? Isn't this tool able to generate a DSM ?

Which other module can I used ? Attached is the licences I've got on Imagine.


Thank's in advance for your help.

Best,

 

Staff
Posts: 123
Registered: ‎06-30-2016

Re: Generate DTM with pusbroom images with Imagine 2018

A new folder named SGM is created in the same folder where teh block file is saved. Inside the SGM folder, you will have DSM in LAS (point cloud) formats. LAS files are not automatically added back to the block file. Y

 

Best regards, Sam

Contributor
Posts: 36
Registered: ‎05-02-2018

Re: Generate DTM with pusbroom images with Imagine 2018

Thank's for your answer,

I just check the directory, but there is no las file, there is only tif, txt, gori, aux, bls and bcf files on the SGM directory

Staff
Posts: 117
Registered: ‎07-04-2016

Re: Generate DTM with pusbroom images with Imagine 2018

Dear @lmatteo,

 

Do you have the latest ERDAS IMAGINE 2018 Update 1 installed - https://download.hexagongeospatial.com/downloads/imagine/erdas-imagine-2018-update-1

 

 

Kind Regards,
Marina Vardovska
Hexagon Geospatial Support
Contributor
Posts: 36
Registered: ‎05-02-2018

Re: Generate DTM with pusbroom images with Imagine 2018

Dear @mvardovs

Thank's for your answer

 

I did the update but  there is no change. Still no las on the folder after running SGM.

By the way, if I try to use Automatic Terrain Extraction (ATE), an error message about licence occur. But I have the ATE and photogrammetry licence.

Contributor
Posts: 36
Registered: ‎05-02-2018

Re: Generate DTM with pusbroom images with Imagine 2018

[ Edited ]

When I press "Run Now" on SGM module, it's locked at 0% like if nothing is running.

Highlighted
Contributor
Posts: 36
Registered: ‎05-02-2018

Re: Generate DTM with pusbroom images with Imagine 2018

Ok, so after few hours of runs,

here is the message that can be found on the imagine_log file :
06/07/18 17:33:42 E:/Program Files/Hexagon/ERDAS IMAGINE 2018/bin/Win32Release/TridiconSGMUTIL.exe -block e:/test/stereo.blk -master 0 e:/test/SGM//stereo_0_1_m.tif -pair 1 e:/test/SGM//stereo_0_1_p.tif -output e:/test/sgm/stereo_0_1_m_stereo_0_1_p_0.la
s -pyramid 0 -zminmax 354.5127 2285.5127
06/07/18 21:34:14 SessionMgr(5132): ERROR: #139 from main
06/07/18 21:34:14 SessionMgr(5132): ERROR: RunTridiconSGM failed
06/07/18 21:34:14 SessionMgr(5132): ERROR: #898 from RunTridiconSGM
06/07/18 21:34:14 SessionMgr(5132): ERROR: Failed to obtain a license for Tridicon SGM
06/07/18 21:34:14 SessionMgr(5132): TridiconSGMUTIL.exe exited normally.
06/07/18 21:34:14 SessionMgr(5132):  exited normally.


It appear that there is a license issue, but I don't understand why, because we pay for the license...

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