[Therion] Question about "\cavedepth" and Northarrow

[Torsten Schnitter]

Hi Stacho

Thanks a lot for the code.
Really great support. :-)

Torsten

> Stacho Mudrak <lists at group-s.sk> hat am 4. April 2014 um 11:02 geschrieben:
> 
> 
> I think, the idea with variables containing coordinate extents and
> modification of layout should do the job. I will try to implement it, in
> the next snapshot.
> 
> And here is the layout code for your north arrow:
> 
> def s_northarrow (expr rot) =
>   T:=identity;
>   picture tmp_pic;
>   tmp_pic = image (
>     begingroup
>       interim defaultscale:=3;
>       label.top("N", origin shifted (0,2.2cm));
>     endgroup;
>     thdraw
> (-.4cm,.4cm)--(0,2cm)--(.4cm,.4cm)--(2cm,0cm)--(.4cm,-.4cm)--(0,-2cm)--(-.4cm,-.4cm)--(-2cm,0)--cycle;
>     thfill (-.4cm,.4cm)--(0,2cm)--(0,0)--cycle;
>     thfill (.4cm,-.4cm)--(0,-2cm)--(0,0)--cycle;
>     thfill (.4cm,.4cm)--(2cm,0)--(0,0)--cycle;
>     thfill (-.4cm,-.4cm)--(-2cm,0)--(0,0)--cycle;
>   );
>   draw tmp_pic scaled 0.5 rotatedaround(origin, -rot);
> enddef;
> 
> 
> S.
> 
> 
> On 3 April 2014 21:19, Bruce <bruce at tomo.co.nz> wrote:
> 
> > Torsten
> > If indeed the 'cave' you have entered has a depth range between -15m and
> > -20m, then I would expect the depth to be reported as (+)5m.  (I presume
> > this is a sea cave, with altitudes below sea level - but it would also be
> > OK
> > if you are using an arbitrary altitude datum).
> >
> > Same as a dry cave that starts at 100m and descends to 95m.  It's depth
> > would be reported as (+)5m, not 100m.
> >
> > Maybe the solution for you is to add altitude points to the wall near each
> > end, so that the altitudes are plotted directly on the map.
> >
> > Or you could add a (manual) map-comment to the header "maximum depth: 20m"
> >
> > Another idea, therion may store variables that define the maximum
> > coordinate
> > range.  If so, then it would simply be a matter of a small metapost to
> > report the minimum altitude.  Stacho? Martin?
> >
> > Bruce
> >
> > -----Original Message-----
> > From: therion-bounces at speleo.sk [mailto:therion-bounces at speleo.sk] On
> > Behalf
> > Of Torsten Schnitter
> > Sent: Friday, 4 April 2014 2:28 a.m.
> > To: therion at speleo.sk
> > Subject: [Therion] Question about "\cavedepth" and Northarrow
> >
> > Hi all
> >
> > I'm wondering a bit about the results from the variable \cavedepth.
> > May be it's not correct this way or I do have a different understanding and
> > someone can explain to me why it is this way.
> >
> > I'm drawing a map (with scraps, points, walls etc) containing just a
> > sidepassage
> > of the entire cavesystem.
> > Concerining the survey data I'm using "data diving ..." within centerline.
> >
> > The result from \cavedepth is now the maximum difference between the
> > shallowest
> > and deepest point of that part of the cave.
> > E.g.: If I have surveypoints in this part of the cave from -15m to -20m the
> > result in the header using \cavedepth is -5m.
> > What I did expect to get from \cavedepth was the maximum depth of this part
> > of
> > the cave, so -20m.
> > Because this is the relevant info to cavedivers.
> >
> > Is there any way to get this result without using the override from
> > \cavedepth?
> > I would like to use the automatic calculation of course but also want to
> > get
> > the
> > maximum depth under water.
> >
> > 2nd question:
> > I would like to use a northarrow as you can see in the attached file.
> > Does anyone have some code for that?
> >
> > Thanks for your help.
> >
> > cheers,
> > Torsten
> >
> > _______________________________________________
> > Therion mailing list
> > Therion at speleo.sk
> > http://mailman.speleo.sk/mailman/listinfo/therion
> >
> _______________________________________________
> Therion mailing list
> Therion at speleo.sk
> http://mailman.speleo.sk/mailman/listinfo/therion