Some introductory Observable documents that are mostly me thinking aloud.

Jo Wood

Hello Observable

Hello Polygons

Hello Transforms

Hello Animation

Hello Plot layout with HTML and CSS

Hello modern colour spaces

Hello Colour Mixing

Hello custom marks with Plot

Hello Polygon Morphing

Hello Zoom-Pan

Hello VegaLite and Vega

Hello Zoomable Vega-Lite Map

Hello Sketchy

Hello ClipperLib

Hello Network

Hello Linear Programming

Hello Census 2021

Hello Labella

Hello function expressions

Hello

I don't think the code is actually doing the flipping of the y-axis.

Maneesh Agrawala

Thanks for spotting this (was a remnant of an earlier draft of the document). I've updated the code and added a line of explanation so that it now does flip the y-axis.

Looks good.  One other thing that might confuse readers is that coords1 is essentially a flipped version of coords (and scaled to be much larger). So when you flip the y-axis in scaleFn it could be a little confusing that the shape generated by rendering coords1 is oriented the same as the shape produced by rendering coords.

Purpose-built for displays of data