I would recommend downloading the files and checking them into your source control, say like so:
curl https://api.observablehq.com/@fil/tissots-indicatrix.tgz?v=3 | tar xvz
I would recommend downloading the files and checking them into your source control, say like so:
curl https://api.observablehq.com/@fil/tissots-indicatrix.tgz?v=3 | tar xvz