[R-sig-Geo] Earthdata CMR access

[Joe Lee]

Hi,

I'm also interested in the solution that you're seeking 
since I've written a Python-equivalent CMR+OPeNDAP workflow a very long time ago [1].

It's both very tricky and difficult nowadays 
because NASA tries to constrain AWS egress cost via Earthdata Login authentication.

Does R provide a cURL-like library + a temporary token-based authentication?

[1] https://earthdata.nasa.gov/collaborate/open-data-services-and-software/api/opendap/gesdisc-airs-opendap-cmr


-----Original Message-----
From: R-sig-Geo <r-sig-geo-bounces using r-project.org> On Behalf Of Ben Tupper
Sent: Wednesday, April 13, 2022 11:41 AM
To: r-sig-geo <r-sig-geo using r-project.org>
Subject: [R-sig-Geo] Earthdata CMR access

Hello,

I am interested in accessing physical oceanography data from PO.DAAC (
https://earthdata.nasa.gov/eosdis/daacs/podaac) from within R using opendap.  NASA is moving its data offerings to the cloud, and it is adopting Common Metadata Repositories ("CMR",
https://cmr.earthdata.nasa.gov/search/site/docs/search/api.html) for searching.  CMR searching is in lieu of searching THREDDS catalogs.

I'm finding the on-ramp to using CMR tricker than I had expected given the sales pitch behind CMR (or maybe the wheels have come off my car!)  I am wondering if anyone in this community has waded into using R-based CMR to access cloud-based geospatial data, and, if so, might be willing to share some insights or provide guidance?

Regards,
Ben

--
Ben Tupper (he/him)
Bigelow Laboratory for Ocean Science
East Boothbay, Maine
http://www.bigelow.org/
https://eco.bigelow.org

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