Shallow dive profile doesn't look too good

Linus Torvalds torvalds at linux-foundation.org
Sun Dec 16 13:47:59 PST 2012


On Sun, Dec 16, 2012 at 1:22 PM, Henrik Brautaset Aronsen
<subsurface at henrik.synth.no> wrote:
> Here's an example of a shallow dive profile: http://db.tt/mR443Zce
>
> There's a lot of screen estate being wasted here.

We on purpose show shallow dives with a minimum depth scale of 30m.

The thinking behind that is that if you print them out - of if you
just switch between dives - scaling everything to the nearest 10m (or
whatever) in order to maximize the screen real estate will look *very*
unnatural. It's very hard to see the differences between a shallow
dive vs a deep dive, because they visually look exactly the same.

We used to scale even shallow dives to fill the whole window, and it
really was very non-intuitive. Same goes (even more) for dive time,
where you really don't want to stretch out short dives to the whole
width of the window.

So when looked at *individually* you might want to see the fully
scaled version, but then when you look at multiple dives, it's
actually nicer to not change the scale of the plot too much (we
obviously do change the scale when you go deeper than 30m).

There's a "zoom mode" (you can toggle it with control-0) that doesn't
limit the depth zoom to 30m (and doesn't limit the time scaling either
- useful for freediving in particular, since freedives are usually
just a couple of minutes).

               Linus


More information about the subsurface mailing list