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Vizzuality / mangrove-atlas

Global Mangrove Watch
https://globalmangrovewatch.org
MIT License
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Extent hi-res layer #781

Open dhakelila opened 1 year ago

dhakelila commented 1 year ago

Some weeks ago we discussed about the possibility to prioritize the inclusion of the extent hi-resolution layer and we want do it, but we don't find the file. I can't remember if or where it was shared. Could you send it again or point us to where to find it?

lhilarides commented 1 year ago

Here's a download link to the latest draft version (v4.007): https://www.dropbox.com/s/zy8dt1vvmz2y5ey/gmw_v4_sen2_sgl_cls_v007.gpkg.gz?dl=1

AngelArcones commented 1 year ago

@lhilarides @klongleywood We are still missing the full extent data (numbers) here. Is this already available or still in preparation?

mluena commented 5 months ago

Hi! @lhilarides, @klongleywood, regarding our recent discussion about the extent of the hi-res layer, I’ve reviewed it with Angel and Alicia. This was the latest update we had. Any further updates that we missed?

lhilarides commented 2 months ago

This is the current version of the GMW v4 that will also be featured in the upcoming State of the Worlds Mangroves 2024 report: https://www.dropbox.com/scl/fi/ier3p3juh5kkgaanvqpu4/gmw_v4019_sen2_mng.gpkg.gz?rlkey=uxna9jnmtokz9b2bdrt2yhw2y&dl=1

To get back to your question on the numbers @AngelArcones and @mluena : we don't publish any stats until the whole timeseries is complete later this year. For now, this layer is nothing more than a high resolution background layer which, if I recall correctly, would be enabled/disabled from the mangrove extent widget

lhilarides commented 2 months ago

Here is the additional info for the hi-res layer:

  1. Download link (add to the existing list of download links of the Mangrove Extent widget: High-resolution 2020 extent: Zenodo

  2. The text to display in the Mangrove Extent widget: Show high-resolution mangrove extent layer

  3. The text behind the "ⓘ" icon:

Overview To enable improvevement of the resolution and local relevance of Global Mangrove Watch data, a new baseline layer has been created for the year 2020. Using Copernicus Sentinel-2 satellite imagery, processed to a pixel resolution of 10 m, the mangrove extent has been completely remapped and revised with many areas which were not previously mapped now included within the new map. This has increased the spatial resolution of the mapping from a pixel resolution of 25 m to 10 m, allowing finer features to be mapped, such as fringing and riverine mangroves.

Using the same pre-processed Sentinel-2 data as used for the ESA WorldCover 2020 map (Zanaga et al., 2021), over 30,000 machine learning models were trained to classify mangroves using over 5 million reference points for mangrove and non-mangrove classes. The reference points were generated using the existing CoastTrain reference dataset (Murray et al., 2022), sampling from the GMW v3.0 mangrove extent layers, user feedback and extensive quality assurance and refinement during the production of the classification.

References

Date of content 2020

License CC-BY-4.0

lhilarides commented 2 months ago

@mluena in the current staging environment, the new hi-res layer does not seem to load. Could you please check?

lhilarides commented 2 months ago

@AngelArcones and @mluena and fyi @klongleywood the data displayed on the staging site currently is still version 4.008. Could you please make sure the latest version (v 4.019) is displayed? See this earlier reply: https://github.com/Vizzuality/mangrove-atlas/issues/781#issuecomment-2221129764

mluena commented 2 months ago

@lhilarides latest version already in staging. I am updating Heroku stack in prod as it's throwing some errors when I try to deploy