update E5 dataset access

[fnattino]

Closes #2

[fnattino]

Hey @SarahAlidoost, since you already had a look at this episode, would you mind checking how do you see it now as first after the background episodes (new episode 5)?

[SarahAlidoost]

@fnattino nice addition, well done 👍 I left some minor comments on the changed files, I also committed some formatting and editorial fixes, as we discussed.

I noticed that the lesson does not include a solution for the first exercise. Can we provide solutions, for example some screenshots of the results?
Also, can we replace the link to the github spec specification with the link to its readme i.e. https://github.com/radiantearth/stac-spec#readme ?

[fnattino]

Thanks @SarahAlidoost - and good point about the solution to the first episode. I'll add some details there!

[fnattino]

Solution with screenshots added - how do you see it @SarahAlidoost ?

[SarahAlidoost]

@fnattino thanks for addressing my comments. very nice job 👍 As we discussed, we can still add something like "this is an example and based on what item you selected, the image in the preview can be different" to the solution. I approved this PR.

[fnattino]

Hi @rbavery , this episode is also ready if/when you have time to review it!

Since this episode will become the first of the lesson, I have simplified it a bit, removing things that will be introduced later like cropping a raster.

The most important change is in the last exercise, which used to make use of Landsat data from the Earth Search STAC endpoint. I have noticed that the datasets are no longer available, so I switched STAC endpoint to the NASA CMR one and modified the exercise to ask for Landsat metadata from the HLS collection. I think introducing this second STAC endpoint might actually be a good thing, since this will be used also in the stackstac/odc-stac episode and it will illustrate how public catalogs can also include protected data.

[rbavery]

Hey @fnattino this looks awesome. Can you update the url to the episode and the table of contents so that this is now lesson 5? I'll give this a more thorough run through tomorrow.

[fnattino]

Thanks a lot @rbavery! I have waited to change the episode file name to facilitate the review (I am afraid that detailed changes will not be highlighted here on GH if I rename the file)- will take care of that just before merging!

[rbavery]

Great stuff @fnattino . The only thing I'm noticing is that the notebook errors and is using a different collection from the markdown lesson: collection = "landsat-8-l1-c1". can this nb be updated to reflect the markdown? or feel free to delete the nb. I don't mind having the notebooks tracked in vc for convenience, but also it may be easier to maintain just one source of truth for the lessons.

[fnattino]

Great @rbavery, and thanks for pointing out the issue of the notebook. I will remove it for now, if we see the need for it we could then add at once notebooks for all episodes at once.