Dox clarification

[Michael Chirico]

In ?GridTopology, we have:

cellcentre.offset numeric; vector with the smallest coordinates for each dimension

To me, this reads as cellcentre.offset is the lower-left corner of the output grid;

In fact, it's the lower-left centroid of the output grid.

This indeed jives with the documentation as stands, since coordinates(grid) will return the lower-left centroid.

However I think it would be helpful to add a short note about this distinction in the documentation, e.g.,

cellcentre.offset numeric; vector with the smallest centroid coordinates for each dimension

[Edzer Pebesma]

Where does your terminology come from? I see, in the same sentence, that coordinates refer to cell center. How much clearer can it get? Anyway, I added "centroid" upon your wish.

[Michael Chirico]

Oh -- I'm running 1.2-3. That phrasing is new. I should have checked the development version. Thank you.

[Edzer Pebesma]

You're right, we were looking at different documentation objects; fixed the other one too.