[OSM-talk] voice recorders

[Steve Chilton]

Some of my best friends are inanimate objects ......

Steve Chilton, Learning Support Fellow
Learning and Technical Support Unit Manager
School of Health and Social Sciences
Middlesex University
phone/fax: 020 8411 5355
email: steve8 at mdx.ac.uk

Chair of the Society of Cartographers: http://www.soc.org.uk/

SoC conference 2007:
http://www.port.ac.uk/special/soc/

Mind the (Map) Gap:
http://news.bbc.co.uk/1/hi/magazine/5413010.stm



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From: talk-bounces at openstreetmap.org
[mailto:talk-bounces at openstreetmap.org] On Behalf Of 80n
Sent: 15 October 2007 14:53
To: David Earl
Cc: talk_at_openstreetmap
Subject: Re: [OSM-talk] voice recorders

 

I've been using the built-in voice tagging capability of my camera for
this purpose.  It works exceptionally well.

Most digital cameras have a method of recording a voice tag along with a
photograph - although its often an obscure and poorly documented
feature. 

I don't actually take photos of a specific object - just press the
shutter button to get a time stamp.  You can then load the photos into
JOSM and synchronise them with your tracklogs.  You can then play the
associated voice tag to tell you what happened at that point. 

It works really well once you get over the fact that some people think
that you are a nutter because you're talking to your camera.

80n

On 10/15/07, David Earl <david at frankieandshadow.com> wrote:

On 15/10/2007 13:58, Jeffrey Martin wrote:
> I was thinking of getting a voice recorder. Do they have clocks?
> Can you synchronize the times and use that to find your
> location on the track?
> Can I ride on the bus and say, "Tunnel begins.... Now"? 
> to mark a point?
>

In principle yes, but I quickly abandoned the idea. If I had some
software to support it it might be easier (e.g. point at a location on
the track to jump to the relevant bit of commentary) 

My Olympus VN-480PC
(http://wiki.openstreetmap.org/index.php/Audio_mapping) does have
date/time (timestamps the file), though it would have to be calibrated 
to the GPS like you would a camera timestamp. You would have to start a
new recording (file) for each POI (it doesn't timestamp each
pause/resume, only new recordings), and then measure the time into the
recording when you say 'now'. Also bear in mind you'll be moving at
10m/s or so.

I found the easiest way on a bike was simply to do a circle in the road
so it is marked on the trace. But obviously you don't have that luxury 
on a bus. Waypoints on the GPS were just too tedious - I would need to
stop cycling; but it may be easier on a bus.

I wish my recorder had voice command activated start/stop. The voice
activation is too sensitive to car and breathing (using a headset) to be

  of any use. If I had the "jump to commentary" software I mentioned,
I'd just leave it running and wouldn't have to listen to hours of heavy
breathing!

David

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