No DSM with Spot7 data

[asonody]

Hi, I am working with Spot 7 data. Unlike the processing with the Pléiade data, none of dsm.tif (in tiles folders) or dsm.vrt are calculated. Moreover some cloud.ply files are generated but I cannot open them and I have the following error message : « reading error (no access right ?) » when I try to open them with CloudCompare for example.

I think the problem comes from the line « Timeout while running <multiprocessing.pool.ApplyResult object at 0x7fcffa9a7810> » but I don’t know if this is a problem with the parameters of the configuration file, with the data I use or an out of memory... I tried to launch s2p on the entire image but also on a smaller area.

You can find the initial configuration file (config_s2p.json) and the result here : https://drive.google.com/open?id=1ZZGEfZRIIvFQiHitKdLK8Ga_rBHcKqBK

Thanks for your help, Anne-Sophie

[gfacciol]

Dear Anne-Sophie, I see three issues here.

a. Your ROI seems to be almost entirely empty. Let's try running with in your main config.json file ( just for testing):

"roi": {

  "y": 13000,
  "x": 2300,
  "w": 1500,
  "h": 1500
 }

b. For the few tiles that worked the disparity range seems to be under-estimated. So I recommend to use:

"disable_srtm": false,

and / or use:

"matching_algorithm": "mgm_multi",

c. There's a wired error message in the logs during the triangulation step:

terminate called after throwing an instance of

'GeographicLib::GeographicErr' what(): Longitude nand more than 60d from center of UTM zone 31

This could be due to some residual utm commands in the config.json. Please try removing the fields * utm_bbx and utm_zome. *

Best, Gabriele

On Wed, Mar 28, 2018 at 12:18 PM, asonody [email protected] wrote:

Hi, I am working with Spot 7 data. Unlike the processing with the Pléiade data, none of dsm.tif (in tiles folders) or dsm.vrt are calculated. Moreover some cloud.ply files are generated but I cannot open them and I have the following error message : « reading error (no access right ?) » when I try to open them with CloudCompare for example.

I think the problem comes from the line « Timeout while running <multiprocessing.pool.ApplyResult object at 0x7fcffa9a7810> » but I don’t know if this is a problem with the parameters of the configuration file, with the data I use or an out of memory... I tried to launch s2p on the entire image but also on a smaller area.

You can find the initial configuration file (config_s2p.json) and the result here : https://drive.google.com/open?id=1ZZGEfZRIIvFQiHitKdLK8Ga_rBHcKqBK

Thanks for your help, Anne-Sophie

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[asonody]

Dear Gabriele,

Thank you for your very quick answer. I tried all your suggestions but it still doesn't seem to work... I cannot remove the field "utm_bbx" (error message), so I just keep it empty, and I still have the problem with the triangulation step... I don't understand why I managed to use s2p with Pleiade data but not with the Spot one using the same method and the same computer.. Are there some restrictions on the image to use ?

Thanks, Anne-Sophie

[Sadrim-71]

Hi All

Is it Possible to process Spot 6/7 satellite imagery using S2P? Was the problem solved?

[gfacciol]

Yes, it is possible to process spot6/7 imagery with s2p. If you have an issue just let us know.

On Wed, Nov 25, 2020 at 5:46 AM sadra313 [email protected] wrote:

Hi All

Is it Possible to process Spot 6/7 satellite imagery using S2P? Was the problem solved?

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