[OSM-talk] Audio mapping experiences

[Florian Lohoff]

Hola,

On Tue, Oct 20, 2015 at 08:39:26PM -0600, Martijn van Exel wrote:
> Hi all, 
> 
> I wrote up my first experiences with audio mapping. I finally made
> some time to try it. It’s on my diary:
> http://www.openstreetmap.org/user/mvexel/diary/36154 . I am curious to
> hear your experiences with this kind of mapping, and if you read the
> post, if you have any tips for me to improve my strategy.

In 2008 i had a quick try with audiomapping - I put a small microswitch
on the indicator lever and USB headset with microphone. I wrote a small
App for a Linux notebook recording the audio and storing with
informations from the GPS. 

It expects the trigger to be connected to the serial port - i think
i used MR (Modem Ready) as an input. If it detects a Modem Ready
it starts an external command recording the input. As soon as you
lift the finger it has a tail time it continues recording.
Then it replays your recording. Used to really helpful as you
could recap what you actually said.
It writes a GPX track all the time referencing the WAV files. So
you could simply open the GPX track with josm and would see the track
and all the audio recordings marked at the point you pressed the button
(not when you lifted it)

The code is here - Untouched since 2008 - I think it need glib, probably
libevent and pulseaudio - Available on all linux systems. You could use
a Raspberry PI or Carambola for that today.

git clone git://pax.zz.de/triggerrec



This was when i was beginning with OSM and the map was empty. Today
there are more fine topology problems to be solved which you cant with 
audio. I am a big fan of using Mapillary today. An picture is worh more
than a thousand words. Back in 2008 nobody talked about "Smartphones".
we had Nokia 6310i without a Camera. Today smartphones are comparably
cheap and storage is cheap and the image resolution of smartphones is
enormous. 

Flo
-- 
Florian Lohoff                                                 f at zz.de
      We need to self-defend - GnuPG/PGP enable your email today!
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