From: Michael Brand <michael.ch.brand@gmail.com>
To: Org Mode <emacs-orgmode@gnu.org>
Cc: Julien Danjou <julien@danjou.info>,
Christian Moe <mail@christianmoe.com>
Subject: Re: link abbreviation with multiple params, e. g. for geo locations
Date: Mon, 6 May 2013 20:42:54 +0200 [thread overview]
Message-ID: <CALn3zojeHoYedWMt_g0u+wis+FU4FXZsbsrszpqoSfBd_x7tUw@mail.gmail.com> (raw)
In-Reply-To: <m28v3sfuz1.fsf@uio.no>
On Mon, May 6, 2013 at 9:06 AM, Christian Moe <mail@christianmoe.com> wrote:
> PS. If Org were to add a default geo: link type, I think it would make
> sense to keep the parameters to a minimum, i.e. just the latitude and
> longitude, without backend-dependent options such as Google Maps' "spn"
> parameter. Though I can see how it would be useful.
Good point, agreed. So what I am trying to do is less about a link
type "geo location" but more about possibly having several different
visualizations of one single geo location.
> When link abbreviations do not suffice, you can always write a link
> definition in Lisp and add it with org-add-link-type.
Thinking about this and my previous post I conclude that Org babel is
just perfect for my use case. Well, as a beginner of Org babel I am
not yet there completely and would like to ask for help on the source
block header:
--------------------------------------------
* Org babel function for Google Maps browser
#+NAME: gmb
#+HEADER: :var ty="m" spn=0.2
#+HEADER: :var geo_var=(or (org-entry-get nil "geo") "4.56,7.89")
#+BEGIN_SRC emacs-lisp :results silent
(browse-url
(concat "http://maps.google.ch/maps?t=" ty
"&spn=" (number-to-string spn) "," (number-to-string spn)
"&ll=" geo_var "&q=" geo_var))
#+END_SRC
* example of a geo location, realistic to try out
:PROPERTIES:
:geo: 4.56,7.89
:END:
- call_gmb()
- interactively (type C-c on "call_gmb") visualize the current geo
location on Google Maps with a marker and as "map" in the
browser
- call_gmb(ty="k", spn=0.002)
- visualize the same geo location on Google Maps with a marker, as
"satellite image" and with a certain scale suitable for this
specific geo location and view type
* another geo location
:PROPERTIES:
:geo: 4.44,5.55
:END:
- call_gmb(ty="p")
- visualize another geo location as "terrain"
--------------------------------------------
The issue is that org-entry-get returns nil instead of the value of
the item property :geo:, therefore my "demo workaround" with the "or"
to show the principle of "gmb". How to resolve this properly?
Isn't there something like "#+HEADER: :var geo_var=:geo:" to copy the
value of the item property :geo: to the babel variable unless
specified by the caller?
Not sure yet how to support export of such geo locations to a GPS
track... That would probably be "simply" all item properties :geo:
with the item's name and nothing else. Probably quite a boring
exercise of writing a new exporter backend for someone who would know
how to do it...
Btw. I re-found the Org mode mailing list thread
[2010-06-29 Tue] "Getting a Google Maps' map for an entry"
http://thread.gmane.org/gmane.emacs.orgmode/26797
by Julien Danjou, currently to be found at
http://julien.danjou.info/projects/emacs-packages#google-maps
It can also be used as a backend to visualize a geo location and
demonstrates the usage of the interesting Google Maps Static Maps API
that converts a Google Maps URL to an image:
https://developers.google.com/maps/documentation/staticmaps/#quick_example
Michael
next prev parent reply other threads:[~2013-05-06 18:42 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-05-05 15:06 link abbreviation with multiple params, e. g. for geo locations Michael Brand
2013-05-06 7:06 ` Christian Moe
2013-05-06 18:42 ` Michael Brand [this message]
2013-05-06 22:29 ` Christian Moe
-- strict thread matches above, loose matches on Subject: below --
2013-05-22 17:03 Michael Brand
2013-05-29 16:14 ` Michael Brand
2013-06-05 17:19 ` Michael Brand
2013-06-06 17:01 ` Eric Schulte
2013-06-07 14:53 ` Michael Brand
2013-06-07 15:18 ` Eric Schulte
2013-06-07 19:16 ` Michael Brand
2013-06-07 19:54 ` Vitalie Spinu
2013-06-08 18:05 ` Eric Schulte
2013-06-08 18:52 ` Vitalie Spinu
2013-06-08 19:21 ` Eric Schulte
2013-06-14 17:54 ` Michael Brand
2013-06-14 18:18 ` Eric Schulte
2013-06-14 20:13 ` Michael Brand
2013-06-19 9:39 ` Michael Brand
2013-06-07 20:10 ` Achim Gratz
2013-06-08 18:03 ` Eric Schulte
2013-06-09 7:56 ` Michael Brand
2013-06-09 8:07 ` Michael Brand
2013-06-09 19:18 ` Eric Schulte
2013-06-09 20:32 ` Michael Brand
2013-06-11 13:12 ` Eric Schulte
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