fix Earthdata example (almost?)

[gaelforget]

It seems that requests to https://cmr.earthdata.nasa.gov/search/granules.stac now require that the url includes a collection_concept_id. The modification to src/search.jl does this and allows for an empty query specification.

In the example, the handling of url, query v FeatureCollection also needed an update after https://github.com/JuliaClimate/STAC.jl/commit/918a1a95649769b01da5c26c8f1cd6d8761bdbbc I believe.

Some problems that may remain :

• [href(item.assets["opendap"]) for item in collection] fails cause collection does not end properly?
• collection = STAC.FeatureCollection(url,query) fails, not sure why

[codecov-commenter]

Codecov Report

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[Alexander-Barth]

It seems that if we make a get request then the collection_concept_id parameter get propagated automatically:

using STAC, URIs, Dates, HTTP, JSON3

timerange = (DateTime(2005,1,1),DateTime(2005,1,2))
collection_concept_id= "C1299783579-LPDAAC_ECS"

url = "https://cmr.earthdata.nasa.gov/search/granules.stac"

query = query = Dict(
    "collection_concept_id" => collection_concept_id,
    "temporal" => join(string.(timerange),','),
    "pageSize" => 100,
)

function FeatureCollection2(url,query; method=:post)
    if method == :get
        url = string(URI(URI(url), query = query))
    end

    ch = Channel{STAC.Item}() do c
        while true
            if method == :post
                @debug "post $url" query
                r = HTTP.post(url,[],JSON3.write(query))
            else
                @debug "get $url"
                r = HTTP.get(url)
            end
            data = JSON3.read(String(r.body))
            for d in data[:features]
                put!(c,STAC.Item("",d,STAC._assets(d)))
            end

            # check if there is a next page
            next = filter(d -> get(d,"rel",nothing) == "next",data[:links])
            # no more next page
            if length(next) == 0
                break
            else
                url = next[1][:href]
            end
        end
    end
end

collection = collect(FeatureCollection2(url,query, method=:get))

@show length(collection)
# output 402

I could not find any collection that supports opendap:

curl "https://cmr.earthdata.nasa.gov/search/collections.json?page_size=100" | python -m json.tool

What ever I query C1996881146-POCLOUD gives always an empty collection. Currently podaac.jpl.nasa.gov is down. Maybe this is related.

[Alexander-Barth]

This problem should be fixed now:

https://github.com/JuliaClimate/STAC.jl/commit/e163edb7728c8e62c20c461fe775ab25f6302e63

Thank for letting me know.

[gaelforget]

This problem should be fixed now:

e163edb

Thank for letting me know.

Works for me now. Thanks for this!