piebro/osm-data huggingface dataset:
SomeoneElse_Revert (2023-06-24 13:30:38+00:00): This changeset has been reverted fully or in part by changesets 137721615, 137721532, 137721745, 137721665, 137721552, 137721573, 137721746, 137721666, 137721496, 137721516, 137721616, 137721759, 137721503, 137721734, 137721720, 137721570, 137721500, 137721755, 137721600, 137721744, 137721664, 137721701, 137721619, 137721621, 137721736, 137721521, 137721749, 137721527, 137721489, 137721643, 137721748, 137721680, 137721757, 137721650, 137721705, 137721550, 137721525, 137721630, 137721517, 137721524, 137721617, 137721653, 137721624, 137721633, 137721567, 137721629, 137721529, 137721667, 137721533, 137721487, 137721661, 137721640, 137721540, 137721722, 137721693, 137721710, 137721583, 137721593, 137721554, 137721608, 137721523, 137721546, 137721623, 137721728, 137721659, 137721716, 137721703, 137721732, 137721715, 137721694, 137721752, 137721645, 137721685, 137721695, 137721507, 137721607, 137721644, 137721671, 137721636, 137721549, 137721635, 137721512, 137721535, 137721520, 137721596, 137721555, 137721742, 137721655, 137721605, 137721581, 137721591, 137721691, 137721750, 137721725, 137721575, 137721675, 137721663, 137721537, 137721493, 137721726, 137721563, 137721718, 137721613, 137721657, 137721557, 137721648, 137721698, 137721688, 137721560, 137721702, 137721740, 137721660, 137721598, 137721522, 137721711, 137721638, 137721753, 137721609, 137721679, 137721647, 137721541, 137721579 where the changeset comment is: Following reports to the DWG, reverting a large import around Greece.  See https://www.openstreetmap.org/changeset/137667141 and links from there
SomeoneElse_Revert (2023-06-24 13:29:41+00:00): This changeset has been reverted fully or in part by changesets 137721615, 137721532, 137721745, 137721665, 137721552, 137721573, 137721746, 137721666, 137721496, 137721516, 137721616, 137721759, 137721503, 137721734, 137721720, 137721570, 137721500, 137721755, 137721600, 137721744, 137721664, 137721701, 137721619, 137721621, 137721736, 137721521, 137721749, 137721527, 137721489, 137721643, 137721748, 137721680, 137721757, 137721650, 137721705, 137721550, 137721525, 137721630, 137721517, 137721524, 137721617, 137721653, 137721624, 137721633, 137721567, 137721629, 137721529, 137721667, 137721533, 137721487, 137721661, 137721640, 137721540, 137721722, 137721693, 137721710, 137721583, 137721593, 137721554, 137721608, 137721523, 137721546, 137721623, 137721728, 137721659, 137721716, 137721703, 137721732, 137721715, 137721694, 137721752, 137721645, 137721685, 137721695, 137721507, 137721607, 137721644, 137721671, 137721636, 137721549, 137721635, 137721512, 137721535, 137721520, 137721596, 137721555, 137721742, 137721655, 137721605, 137721581, 137721591, 137721691, 137721750, 137721725, 137721575, 137721675, 137721663, 137721537, 137721493, 137721726, 137721563, 137721718, 137721613, 137721657, 137721557, 137721648, 137721698, 137721688, 137721560, 137721702, 137721740, 137721660, 137721598, 137721522, 137721711, 137721638, 137721753, 137721609, 137721679, 137721647, 137721541, 137721579 where the changeset comment is: Following reports to the DWG, reverting a large import around Greece.  See https://www.openstreetmap.org/changeset/137667141 and links from there
SomeoneElse_Revert (2023-06-24 13:42:33+00:00): This changeset has been reverted fully or in part by changesets 137722105, 137722030, 137722164, 137722217, 137722123, 137722112, 137722250, 137722101, 137722167, 137722262, 137722179, 137722120, 137722244, 137722058, 137722139, 137722073, 137722238, 137722188, 137722198, 137722029, 137722070, 137722075, 137722118, 137722174, 137722148, 137722249, 137722027, 137722182, 137722036, 137722137, 137722232, 137722052, 137722035, 137722046, 137722138, 137722059, 137722144, 137722041, 137722114, 137722201, 137722178, 137722083, 137722220, 137722205, 137722206, 137722016, 137722223, 137722156, 137722086, 137722221, 137722203, 137722184, 137722248, 137722091, 137722226, 137722081, 137722013, 137722218, 137722040, 137722168, 137722243, 137722018, 137722171, 137722077, 137722257, 137722136, 137722124, 137722092, 137722163, 137722026, 137722213, 137722254, 137722048, 137722133, 137722211, 137722104, 137722079, 137722216, 137722023, 137722064, 137722130, 137722215, 137722107, 137722246, 137722241, 137722227, 137722094, 137722191, 137722154, 137722049, 137722260, 137722236, 137722055, 137722186, 137722032, 137722252, 137722235, 137722110, 137722263, 137722196, 137722097, 137722068, 137722072, 137722209, 137722143, 137722019, 137722141, 137722044, 137722258, 137722038, 137722159, 137722229, 137722128, 137722230, 137722050, 137722116, 137722190, 137722261, 137722233, 137722078, 137722062, 137722193 where the changeset comment is: Following reports to the DWG, reverting a large import around Greece.  See https://www.openstreetmap.org/changeset/137667141 and links from there
SomeoneElse_Revert (2023-06-24 13:42:20+00:00): This changeset has been reverted fully or in part by changesets 137722105, 137722030, 137722164, 137722217, 137722123, 137722112, 137722250, 137722101, 137722167, 137722262, 137722179, 137722120, 137722244, 137722058, 137722139, 137722073, 137722238, 137722188, 137722198, 137722029, 137722070, 137722075, 137722118, 137722174, 137722148, 137722249, 137722027, 137722182, 137722036, 137722137, 137722232, 137722052, 137722035, 137722046, 137722138, 137722059, 137722144, 137722041, 137722114, 137722201, 137722178, 137722083, 137722220, 137722205, 137722206, 137722016, 137722223, 137722156, 137722086, 137722221, 137722203, 137722184, 137722248, 137722091, 137722226, 137722081, 137722013, 137722218, 137722040, 137722168, 137722243, 137722018, 137722171, 137722077, 137722257, 137722136, 137722124, 137722092, 137722163, 137722026, 137722213, 137722254, 137722048, 137722133, 137722211, 137722104, 137722079, 137722216, 137722023, 137722064, 137722130, 137722215, 137722107, 137722246, 137722241, 137722227, 137722094, 137722191, 137722154, 137722049, 137722260, 137722236, 137722055, 137722186, 137722032, 137722252, 137722235, 137722110, 137722263, 137722196, 137722097, 137722068, 137722072, 137722209, 137722143, 137722019, 137722141, 137722044, 137722258, 137722038, 137722159, 137722229, 137722128, 137722230, 137722050, 137722116, 137722190, 137722261, 137722233, 137722078, 137722062, 137722193 where the changeset comment is: Following reports to the DWG, reverting a large import around Greece.  See https://www.openstreetmap.org/changeset/137667141 and links from there
ChaireMobiliteKaligrafy (2023-06-23 01:35:11+00:00): Is this temporary or permanent? How do cars access the shops and services on the street then?
davidjwnam (2023-06-23 01:44:13+00:00): It is permanent. Has been like this for several years. Both sides are open and they are two-way streets. Due to the construction of several condo buildings, they wanted to reduce cars here. You can also see it on satellite view. East side is a "park" area with the back of the businesses on Jean Talon and the entrance of a carwash that can be accessed by their parking lot. The west side is fully accessible via Mountain Sights.
ChaireMobiliteKaligrafy (2023-06-23 02:01:30+00:00): OK, perfect, I see it now. It was on the other side of the cross walk though. Fixed it. Thanks!
SomeoneElse_Revert (2023-06-24 13:29:40+00:00): This changeset has been reverted fully or in part by changesets 137721615, 137721532, 137721745, 137721665, 137721552, 137721573, 137721746, 137721666, 137721496, 137721516, 137721616, 137721759, 137721503, 137721734, 137721720, 137721570, 137721500, 137721755, 137721600, 137721744, 137721664, 137721701, 137721619, 137721621, 137721736, 137721521, 137721749, 137721527, 137721489, 137721643, 137721748, 137721680, 137721757, 137721650, 137721705, 137721550, 137721525, 137721630, 137721517, 137721524, 137721617, 137721653, 137721624, 137721633, 137721567, 137721629, 137721529, 137721667, 137721533, 137721487, 137721661, 137721640, 137721540, 137721722, 137721693, 137721710, 137721583, 137721593, 137721554, 137721608, 137721523, 137721546, 137721623, 137721728, 137721659, 137721716, 137721703, 137721732, 137721715, 137721694, 137721752, 137721645, 137721685, 137721695, 137721507, 137721607, 137721644, 137721671, 137721636, 137721549, 137721635, 137721512, 137721535, 137721520, 137721596, 137721555, 137721742, 137721655, 137721605, 137721581, 137721591, 137721691, 137721750, 137721725, 137721575, 137721675, 137721663, 137721537, 137721493, 137721726, 137721563, 137721718, 137721613, 137721657, 137721557, 137721648, 137721698, 137721688, 137721560, 137721702, 137721740, 137721660, 137721598, 137721522, 137721711, 137721638, 137721753, 137721609, 137721679, 137721647, 137721541, 137721579 where the changeset comment is: Following reports to the DWG, reverting a large import around Greece.  See https://www.openstreetmap.org/changeset/137667141 and links from there
SomeoneElse_Revert (2023-06-24 13:42:13+00:00): This changeset has been reverted fully or in part by changesets 137722105, 137722030, 137722164, 137722217, 137722123, 137722112, 137722250, 137722101, 137722167, 137722262, 137722179, 137722120, 137722244, 137722058, 137722139, 137722073, 137722238, 137722188, 137722198, 137722029, 137722070, 137722075, 137722118, 137722174, 137722148, 137722249, 137722027, 137722182, 137722036, 137722137, 137722232, 137722052, 137722035, 137722046, 137722138, 137722059, 137722144, 137722041, 137722114, 137722201, 137722178, 137722083, 137722220, 137722205, 137722206, 137722016, 137722223, 137722156, 137722086, 137722221, 137722203, 137722184, 137722248, 137722091, 137722226, 137722081, 137722013, 137722218, 137722040, 137722168, 137722243, 137722018, 137722171, 137722077, 137722257, 137722136, 137722124, 137722092, 137722163, 137722026, 137722213, 137722254, 137722048, 137722133, 137722211, 137722104, 137722079, 137722216, 137722023, 137722064, 137722130, 137722215, 137722107, 137722246, 137722241, 137722227, 137722094, 137722191, 137722154, 137722049, 137722260, 137722236, 137722055, 137722186, 137722032, 137722252, 137722235, 137722110, 137722263, 137722196, 137722097, 137722068, 137722072, 137722209, 137722143, 137722019, 137722141, 137722044, 137722258, 137722038, 137722159, 137722229, 137722128, 137722230, 137722050, 137722116, 137722190, 137722261, 137722233, 137722078, 137722062, 137722193 where the changeset comment is: Following reports to the DWG, reverting a large import around Greece.  See https://www.openstreetmap.org/changeset/137667141 and links from there
Taya_S (2023-06-23 06:18:05+00:00): Hi, I was wondering where this import was discussed. I am also worried about the CC BY 4.0 because this license is not compatible with the ODbL license OSM uses. 

You also list as source "Landsat-8/ Google Earth" which seems problematic to me. 

I am also confused how seagrass counts as a seamark.

Sincerely,
Taya
josail (2023-06-23 07:18:24+00:00): Hi Taya, 
seagrass has been amended in the IHO INT-1 standard as parallel to seaweed but distinct feature. It has 2021/2022 been discussed with opeanseamap authors and was integrated in the amendments for the nature of the seabed according to INT-1 section J: https://wiki.openstreetmap.org/wiki/Seamarks/INT-1_Section_J

Landsat-8/Google do not play a direct role. Rather the commit is based on a comprehensive scientific work, which in itself has been using a combination of ground truthing and satellite imagary. Its product was published as open access work CC BY 4.0 on https://www.seanoe.org/data/00765/87740/. Attribution to the team of authors of the scientific work has been made appropriately both by inclusion of the tag attribution and in the tag source of the commit. The further work for OSM validation I commit as OSM mapper. 
If you see further problem here, could you specify this, so that I could approach the authors of HCMR with a detailed additional request? 
The puorpose is clearly the indication of protected vegetated areas of the seabed in coastal waters and this is in my view very much achived for skippers of leisure crafts and their anchoring strategies by visibility of seagrass in the OpenSeaMap, OpenNauticalChart, OSMAND and other OSM map derivatives. Such visibility is much reflecting the purpose of the original scientific work published as open access data by HCMR.
josail (2023-06-23 07:19:49+00:00): Does this explain the case. Happy to answer further questions or need for clarifications. Best regards, Jo
Taya_S (2023-06-23 08:16:50+00:00): Hello Josail,

Thanks for the response.

I do believe that having this data could be beneficial to others and to prevent accidental damage to the seabeds. So having this data would be good.

The problem I still see however is that the CC BY 4.0 international license has some compatibility issues with the ODbL license OSM uses. 
See: https://blog.openstreetmap.org/2017/03/17/use-of-cc-by-data/
That blog post also contains a link to a waiver document that can be used to ask the authors for express permission. 

A further problem I see is that imports have very specific guidelines that must be followed.
See this page: https://wiki.openstreetmap.org/wiki/Import/Guidelines
This is to allow other users to chime in with regards to how they feel about this import, to asses the quality, how this import should be done and other things like that. I could not find any discussion about this import in the community forums nor in the import catalogue wiki page. 

Sincerely,
Taya
josail (2023-06-23 15:57:42+00:00): Hi Taya, 

thanks a lot for your advice. I was not aware of the dedicated guidelines for this and like to follow up accordingly.

Regarding 

Step 1) Regarding the biggest concern of overlap I can tell, that this is minimal so far, as the seagrass tag is relatively new both in internatinal IHO code INT-1 and OSM seamarks.  The current example is at islands Ios and Iraklia in Kyklades and this one I have taken good care of to not overlap with the import. Further, the coastal waters lack seabed information and there is so far no risk of overlap with existing seagrass and seabed tags in the near shore coastal areas in Greece. Indeed the import of Seagrass Meadows in Greek Sea near shore, after becoming visible, will likely motivate others to use, apply and further amend these OSM tags. That is the intention of the import in the best sense of OSM mapping.  

Step 2+3.1) I will clarify CC BY 4.0 waiver with scientific authors 

Step 3.2 and following) 
I will apply and follow the Guidelines with an appropriate process. 
If I understand right, I need to open a dedicated wiki page.  I will use https://wiki.openstreetmap.org/wiki/Import/Plan_Outline. Much of the work for adjusting to OSM and validating tags, including a very good comparison between my earlier findings and the outcome of the scientific report, I have already completed, so quite clear to describe it. 

Where I could really need some advice is the size of imports. I have the entire set of data for Seagrass Meadows in Greek Sea as one OSM, validated, all errors solved. This is what I tried uploading and it looks, the size was ok, but here I'm not certain. Can you tell me, whether there is a need to artificially split this changeset or can it stay in this size.

Any further advice and comments are welcome.

Josail
Taya_S (2023-06-23 18:31:50+00:00): If we're talking area wise: It really depends. Personally I'd just try to avoid big land areas and especially major cities in this case. If its just above the ocean the changeset size is a lot less relevant.

if we're talking node wise: A lot of imports can have excessive amounts of nodes due to the way they handle things like curves. So reducing the amounts can be benificial. I think that could also be the case here. I tried simplifying a few area's you added (shift+y in josm) and could reduce the amount of nodes by 50% (by selecting 0.5m) and it didnt really make much of a visual impact unless I zoomed in as much as possible. 

I also noticed you had a few pixellated areas. Might be worth looking in to. 
https://www.openstreetmap.org/way/1184351223
https://www.openstreetmap.org/relation/16009408
josail (2023-06-24 07:18:37+00:00): I have now
* started the CC BY permission request with the authors
* performed a 'simplify way' calculation over night resulting in: 

1. -750000 nodes @ 0.5m precision, testing @ 0.25m precision showed much less effect, corresponding to the fact, that most nodes are 5 to 50 m apart, so in reasonable distances for the task of mapping the seagrass areas

2. doubling of the .osm file size
1 and 2 are contradicting, but I guess, the .osm file keeps the 'simplify way' change information, so, doubling information. Is there a way to consolidate this 'simplify way' change (erase the original from the .osm, keep the reduced data), to see the net effect? 

In no case do I want to double the data load and would like to confirm the effectivness of the 'simplify way' procedure @0.5m precision.

Regarding few pixellated areas: These originate from the dataset and in some cases its development from interpretation of satellite imagery by the researchers. It means, that it represents the original and expert 'best knowledge' so far. Hopefully the OSM nautical community with all their local perspectives will find interest in further refining this data with local (not satellite pixellated) information, once this becomes apparent by initial display of the existing seagrass information. Intentionally, the icon fill for seagrass areas is designed without border lines of the area, so that pixellated source data has less pixellated optical impact in its OpenSeaMap, OpenNauticalChart and OSMAND representations.
ika-chan! (2023-06-24 10:08:23+00:00): See: https://community.openstreetmap.org/t/huge-import-by-josail/100460 - I don't think this import can stand if some of the items have Google as the source.
josail (2023-06-24 11:36:34+00:00): To clarify this: The source is neither Google nor Landsat but a completed and stand-alone scientific work published here https://www.seanoe.org/data/00765/87740/ , which in itself among many other sources used also Google and Landsat. The correct attribution is made in the attribution tag. I will suggest to clarify this in the source, i.e. name the primary source https://www.seanoe.org/data/00765/87740/, and only give indication that this completed work has been performed with diferent satellite imagery, in some cases including indirectly also Google and Landsat. 
I hope this makes it clear, and clarification of CC BY 4.0 permission for the original and primiary source for OSM is already requested.
Thank you very much for your reviews and indication of clarifications to be done for using the published data in OSM. I hope to get feedback of the authors soon and will then open a dedicated wiki page for further description and discussion. Your further input will be very welcome. Greetings, Josail
SomeoneElse (2023-06-24 12:47:53+00:00): Re " The source is neither Google nor Landsat but a completed and stand-alone scientific work published here https://www.seanoe.org/data/00765/87740/ , which in itself among many other sources used also Google and Landsat", I don't believe that you can "licence-wash" data in this way.

There are clearly numerous problems with this data.  I'll revert and if necessary redact.

Please follow https://wiki.openstreetmap.org/wiki/Automated_Edits_code_of_conduct to discuss the potential addition of this data to OSM.
SomeoneElse (2023-06-24 13:10:43+00:00): Revert in progress at https://www.openstreetmap.org/changeset/137720979 .  @josail, please don't attempt to change any of these objects until the revert/redact is completed (might take a couple of days).
SomeoneElse (2023-06-24 13:43:09+00:00): Actually, revert still in progress - some were missed in my attempt to revert "only this latest import".
josail (2023-06-25 11:29:47+00:00): Let me know if I can or should support the revert process somehow from my side. I will do everything to set up and discuss the process appropriately. josail
josail (2023-06-25 11:33:52+00:00): for inormation and an effective revert process: There have been nil "edits" to the existing OSM with this commit, it was all pure "addition". So normally a revert by complete "deletion" should perfectly revert all elements of this commit.
SomeoneElse (2023-06-25 13:09:40+00:00): @josail by all means do help delete the nodes that are left (I suspect that there are only nodes left).  I'm going through deleting them with the revert scripts, but if you've beaten me to it that won't cause a problem.
After that I'll recheck some earlier edits (I believe I need to re-add some of the earlier non-import edits that you did - the changeset comments were very similar and some earlier things got deleted by mistake).
josail (2023-06-25 16:27:50+00:00): @SomeoneElse, 
I'm sorry that the revert turns out complicated. Yes, some of the seagrass, that has been there since long and which is not part of this changeset #137667141 has been deleted completely, too. However, I can certainly say that minor amendments to this preexisting seagrass have all been committed as minor changeset before the changeset #137667141. 

For theses minor changes, we should now look for the revert of the revert. I can further assure that these were all the seagrass around the islands of Ios, Iraklia and west side of Shinousa. This seagrass, carefully manually mapped from bing, maxar, Esri and Mapbox as well as by diving in some of the areas are now lost. 

Can you identify this by the exact timing of the changesets before and after changeset #137667141? 

This would be the correct and precise solution to this revert complication.

If you tell me 'how to' I am happy to help this necessary sorting process.

Jo
SomeoneElse (2023-06-25 16:51:52+00:00): The first revert changeset in the sequence that deleted some older items was https://www.openstreetmap.org/changeset/137720979 .  Subsequent changesets in the same sequence have exactly the same comment.  Nodes with ids below 10992910905 that were deleted in that sequence can be undeleted, and also deleted ways with those nodes as members with similarly early ids, and also deleted relations with those ways as members with similarly early ids.  See https://www.openstreetmap.org/changeset/137757884 as an example.
josail (2023-06-25 19:39:13+00:00): Shall I work on this 'undeleting' and then what is the best procedure to do this in JOSM. I can contribute the exact map history knowledge in these cases of what was there before changeset #137667141. But I want to be sure together with you that we don't do things on two sides and would need some assurance to identify the correct way of doing this in JOSM in order to avoid any additional complications.  Your advice or instruction on these two questions will be very welcome. Jo
SomeoneElse (2023-06-25 22:16:17+00:00): I've no idea how you'd do this in JOSM.
I've undeleted the old nodes, ways and relations that were deleted in error and redeleted a couple of ways in https://www.openstreetmap.org/changeset/137766612 .  I think that's everything now; although some of the objects referenced in https://www.openstreetmap.org/changeset/137720979 perhaps could do with another pair of eyes.
SomeoneElse (2023-06-25 22:18:54+00:00): Just to mention one other thing - after you have sorted out the licence issues, as you discuss this potential import with the community, please do read https://wiki.openstreetmap.org/wiki/Import/Guidelines again, especially https://wiki.openstreetmap.org/wiki/Import/Guidelines#Using_a_dedicated_user_account .  Had you done that it would have saved most of my weekend.