[PATCH] Show single dives in map.

Linus Torvalds torvalds at linux-foundation.org
Wed Jan 16 08:59:41 PST 2013

On Wed, Jan 16, 2013 at 1:24 AM, Robert C. Helling <helling at lmu.de> wrote:
> How do you guys get the GPS coordinates for your dives? Given that GPS under
> water is useless I would expect not too many dive computers have a GPS
> receiver. Thus for me it would be most important to be able to use the map
> to add coordinates to the dive.

I agree that we want to be able to use the map to add coordinates, but
I also try to get the gps location using my phone. Maps don't work all
that well for many boat dives ("I was *where* on this map? No idea").

And I don't expect most dives to necessarily have GPS coordinates at
all. Although if we make it easy enough (partly with map lookup,
partly by making it easier to have a database of dive sites for repeat
dives), maybe eventually people generally *will* have location data
for most dives.

> In my past logbooks, I always had two entries: dive site and point of entry.
> The dive site can for example be a lake and that can have several points of
> entry (typically a few 100m apart so you rarely dive from one to the other
> and often each with their own character wrt artefacts and topology you
> encouter etc). I guess the GPS coordinates would be per dive site.

I would argue that the GPS coordinates make most sense for the point
of entry, largely exactly because GPS doesn't work underwater.

Sure, you could try to pinpoint the dive site itself using a map (or
maybe you have a buoy and a very tight line ;), but I think the basic
expectation is "use gps for entrypoint, use text - dive site name or
notes - to describe which particular site you then went to".


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