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​Basemap viewer and GEE's tfrecord image different

  • 24 September 2022
  • 5 replies
  • 135 views

Userlevel 1
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We notice a significant difference between some images that Planet shows us on its Planet-NICFI Basemap Viewer and those extracted in TFRecord format. Here is a guided example of what we notice:

There is a shp and a geojson (id_27954006.zip) of a 540x540 meters grid on this link: 

drive.google.com/drive/folders/1jv-oFoLkJZLCJieXIpULBYxqsPg6wl32?usp=sharing

This is what this geometry looks like in  ‘planet_medres_normalized_analytic_2021-10_mosaic’ in Basemap Viewer: 

Basemap View of the id_27954006.geojson in 2021-10 normalized mosaic

We extract the NICFI-Planet geometry of this shp into TFRecord files using Planet integration with Google Earth Engine. Tropical Americas Image Collections are filtered as in the developer’s example using python. We use ee.Filter.date(‘2021-10-01’, ‘2021-10-31’) to get the same October mosaic basemap than before.

This process results in a TFRecord file (id27954006_1.tfrecord.gz) with bands data from Planet Basemap (R, G, B). When we extract the information of these TFRecord and plot it we obtain the following: 

Image of the tfrecord file obtained using GEE

In most geometries and mosaics with which we work, these images are usually the same. However, this problem has been presented to us on several occasions and we have not found information about it.

We have not seen any information about this problem. Thank you for your attention!

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Best answer by NICFI Program team 26 September 2022, 15:50

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5 replies

Userlevel 2
Badge +3

Hi there, thanks for raising this, this is not an issue that has been flagged before.  Let us investigate and we will come back to you! Thanks - NICFI Satellite Data Program team 

Userlevel 2
Badge +3

Hi again, we need to investigate this a bit more and request you contact us at nicfi-servicedesk@ksat.no with your GEE ID and the code using to extract this so that we can understand this issue.  Unfortunately without this information it is going to be difficult for us to investigate.  Look forward to hearing from you

Userlevel 1
Badge +2

Thanks for your reply! I just sent my GEE ID and the code used for the extraction to the email you indicated. The subject of the email has the same title as this post and was assigned the ID [NICFI #91713]

Userlevel 1
Badge +2

Hi again, we need to investigate this a bit more and request you contact us at nicfi-servicedesk@ksat.no with your GEE ID and the code using to extract this so that we can understand this issue.  Unfortunately without this information it is going to be difficult for us to investigate.  Look forward to hearing from you

Thanks!

Userlevel 2
Badge +3

Hi again, we sent you a follow up from our helpdesk but nothing yet, do let us know if we can help further :)

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