Export mode that flips the Y axis: Allow for coordinate output for Quadrant I rather than Quadrant IV

[alizauf]

Dots are currently exported with coordinates that make the image appear correctly when rendered in HTML Canvas or SVG (Quadrant IV on a Cartesian Plane). But if you import coordinates into a tool like excel or R, the image will appear upside down because it defaults to Quadrant I.

I had thought of this earlier in the project when playing around with the csv export to Excel, but forgot about it and never implemented. But was reminded of it by this thread: https://twitter.com/dataandme/status/974660677779513344

Should be simple to set your desired export mode, so you don't have to flip your axis in R or Excel or similar.