On 13/02/2015 3:38 AM, Greg Troxel wrote:
Peter Wendorff writes:
Am 18.01.2015 um 07:14 schrieb John F. Eldredge:
You could use a light meter to measure how bright the light is. That
isn't the only factor in the suitability of the lighting, but it is
objective.
... provided that you measure
Warin <61sundow...@gmail.com> writes:
> Went out last night .. light level pointing up to street light was 0.0
> lux... so less than 0.1 lux. Meaning I could not measure it this
> way. I'll think about it. A talk to an expert might be worth while?
That doesn't make sense. I would expect severa
Volker Schmidt writes:
> As I said earlier, I am also a hobby photographer. The light levels we are
> talking about are anyway in a range that old-fashioned hand-held light
> meters are useless. Then it's the question of the different metering
Many current photo meters will read in lux, and dow
Peter Wendorff writes:
> Am 18.01.2015 um 07:14 schrieb John F. Eldredge:
>> You could use a light meter to measure how bright the light is. That
>> isn't the only factor in the suitability of the lighting, but it is
>> objective.
> ... provided that you measure on a dark night without moon and
> Am 18.01.2015 um 17:21 schrieb Volker Schmidt :
>
> Streetlamp mapping does not help.
> All our city cycleways are within the lighting radius of street lamps, but
> they are often interspersed with street-linign trees.
> lamps may be on the opposite side of the street than the cyclepath
> st
Volker Schmidt wrote:
>I am very cautious about any of this kind of measurement for the following
>reasons:
>1) the results will be very difficult to standardise
>2) the effort is far beyond that what a mapper can reasonably do.
Oh well, I guess I'll have to write a comment here, because I recen
On 20/01/2015 6:55 PM, tagging-requ...@openstreetmap.org wrote:
Date: Tue, 20 Jan 2015 08:55:37 +0100
From: Volker Schmidt
To: "Tag discussion, strategy and related tools"
Subject: Re: [Tagging] Tagging road illumination quality
Message-ID:
Content-Type: text/plai
As I said earlier, I am also a hobby photographer. The light levels we are
talking about are anyway in a range that old-fashioned hand-held light
meters are useless. Then it's the question of the different metering
methods, plus the changing weather conditions, moon phases and whatever you
can drea
On 20/01/2015 01:21, Warin wrote:
As a camera/light meter should try to reproduce the human eyes
response I'd think it would be a good approximation - certainly
acceptable compared to a subjective human assessment of
'bright/good/bad/average'.
Perhaps what you need to do is to make some mea
On 20/01/2015 10:38 AM, tagging-requ...@openstreetmap.org wrote:
Date: Mon, 19 Jan 2015 20:41:27 +0100
From: Peter Wendorff
To:tagging@openstreetmap.org
Subject: Re: [Tagging] Tagging road illumination quality
Message-ID:<54bd5de7.2070...@uni-paderborn.de>
Content-Type: text/plain; charset
Am 18.01.2015 um 07:14 schrieb John F. Eldredge:
> You could use a light meter to measure how bright the light is. That
> isn't the only factor in the suitability of the lighting, but it is
> objective.
... provided that you measure on a dark night without moon and stars,
without cars driving on th
Streetlamp mapping does not help.
All our city cycleways are within the lighting radius of street lamps, but
- they are often interspersed with street-linign trees.
- lamps may be on the opposite side of the street than the cyclepath
- street lamps have illumination bodies pointing at str
> Am 18.01.2015 um 12:16 schrieb Volker Schmidt :
>
> Assume you have a 100m stretch with nice illumination but there is a tiny
> S-bend exactly overshadowed by an evergreen tree, which produces a pitch dark
> spot of 10m at a dangerous point. What do you do? Put an illumination value
> eve
un, 18 Jan 2015 00:14:36 -0600
> From: "John F. Eldredge"
> To: "Tag discussion, strategy and related tools"
> , Volker Schmidt
>
> Subject: Re: [Tagging] Tagging road illumination quality
> Message-ID:
>
On 18/01/2015 5:14 PM, tagging-requ...@openstreetmap.org wrote:
Date: Sun, 18 Jan 2015 00:14:36 -0600
From: "John F. Eldredge"
To: "Tag discussion, strategy and related tools"
, Volker Schmidt
Subject: Re: [Tagging] Tagging road illuminatio
You could use a light meter to measure how bright the light is. That isn't
the only factor in the suitability of the lighting, but it is objective.
--
John F. Eldredge -- j...@jfeldredge.com
"Darkness cannot drive out darkness; only light can do that. Hate cannot
drive out hate; only love can d
Hi -
Yes, it's useful to go beyond lit=yes and lit=no. Some of those
suggestions such as "poor" and "sufficient" are too subjective, as I
think you already acknowledge. Not only are they value judgments but
they depend on the user's perspective and needs, so please do try to
avoid them.
Some of t
The light sources' positions often have little to do with the real
illumination effect.
In many cases, in my city, cycle paths (in reality they all are mixed-use
pedestrian and bicycle with priority by law to pedestrians) have been
produced by converting former sidewalks. The lamp posts are those i
Hi,
On 01/16/2015 06:18 PM, Volker Schmidt wrote:
> This is unfortunately a thorny issue, as there is no easy way to measure
> in an objective way the quality of the illumination.
Indeed. I would suggest mapping the individual light sources instead.
Bye
Frederik
--
Frederik Ramm ## eMail fre
I would like to enter illumination quality for bicycle infrastructure
(cycleways) in OSM.
This is unfortunately a thorny issue, as there is no easy way to measure in
an objective way the quality of the illumination.
Has anyone already looked into this?
I could invent something along the lines of th
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