[Tagging] Date formatting proposal

2010-11-10 Thread Laurence Penney
I'm posting here a link to a proposal for date formatting that I just added to 
the start_date wiki page:

http://wiki.openstreetmap.org/wiki/Key:start_date

The motivator was the discovery of many tag values of unfeasible heterogeneity 
in start_date. Taginfo reports 18313 usages (2814 distinct), of which these are 
examples of values other than simple 4-digit years[1]:

1986-08-21 29/09/2006 05/01/2005 2002-12-31 03/12/2004 2001-07-12 20101012 
Nov␣2007 1.1.2012 1966␣restauriert 0200-12-29 0085-12-12 4.12.10 Spring␣2010 
-2000 08.2010 18.␣jahrh. 0008-09-16 2009-09-10␣09:00:00␣+0200 1966-08-XX 
19th␣century February␣2000 2007-XX-XX 1700-talet 1960s c.␣1903 1758;␣1909 
12.␣April␣2008 1869-19?? Early␣18th␣century 1984;1988;1986;1985;1989;1989;1986 
Summer␣of␣2009 13/07/2006;␣05/01/2005 circa␣1820 5/1923␣-␣10/1926 623AD 
Late␣11th␣to␣early␣12th␣century -3 1878 
1959-09-01;1960-08-19;1960-08-31;2006-10-26 XVème 3100␣BC

... and my favourite: octobre

So it's clear there's a demand for: exact dates; general approximations; 
approximations to the month, season, century; before date and after date; 
early period and late period, maybe also mid period; date ranges; 
multiple values; BC and AD.

We can probably ignore: exact times. They should go in their own time tags, if 
anyone wants them.

In my own historic photo tagging I have found numerous captions that date 
pictures with varying degrees of precision using similar non-standard means. I 
then turn these into a date tag, trying to capture as much of that vague 
richness as possible. The proposed scheme is similar to what I have been using 
and parsing successfully.

Comments welcome! Please follow up either here or on the Discussion page on the 
wiki.

- L

[1] http://taginfo.openstreetmap.de/keys/start_date


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[Tagging] landuse for arboretum

2010-11-10 Thread Richard Welty

i'm currently doing the boundaries for the Pine Hollow Arboretum south
of Albany NY.

none of the current landuse/natural tags seem quite appropriate. 
landuse=forest
and natural= wood are closest, but i'd hesitate to use either without a 
subtype
tag indicating that it's specifically an arboretum (denoting a site 
where trees in

a natural setting, not necessarily local to the site, may be viewed.)

an arboretum sort of sits in the middle between the two classifications,
it's managed in a limited way in that there are intentional plantings of
interesting trees, but the management is limited in that dead trees
may not be cleared, etc.

i'm using landuse=forest for now, but would like to invite discussion
of which main tag is really appropriate and what subtype tag might be used.

richard


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Re: [Tagging] landuse for arboretum

2010-11-10 Thread Craig Wallace

On 10/11/2010 22:01, Richard Welty wrote:

i'm currently doing the boundaries for the Pine Hollow Arboretum south
of Albany NY.

none of the current landuse/natural tags seem quite appropriate.
landuse=forest
and natural= wood are closest, but i'd hesitate to use either without a
subtype
tag indicating that it's specifically an arboretum (denoting a site
where trees in
a natural setting, not necessarily local to the site, may be viewed.)

an arboretum sort of sits in the middle between the two classifications,
it's managed in a limited way in that there are intentional plantings of
interesting trees, but the management is limited in that dead trees
may not be cleared, etc.

i'm using landuse=forest for now, but would like to invite discussion
of which main tag is really appropriate and what subtype tag might be used.


Wouldn't it be covered by leisure=garden? ie Place where flowers and 
other plants are grown in a decorative and structured manner or for 
scientific purposes.
Its just it specifically focuses on trees, as opposed to flowers or 
other plants.
Maybe with a subtag to specify it is an arboretum? There is a proposal 
for extra tags for garden types: 
http://wiki.openstreetmap.org/wiki/Proposed_features/Garden_specification


Though I do think that landuse=forest vs natural=wood is a mess. Better 
to just use one tag for any area covered by trees, then use extra tags 
for whether it is 'natural' or managed, what it is used for, and what 
types of trees etc.


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Re: [Tagging] Date formatting proposal

2010-11-10 Thread Andrew Errington
On Thu, November 11, 2010 04:56, Laurence Penney wrote:
 I'm posting here a link to a proposal for date formatting that I just
 added to the start_date wiki page:
snip
 Comments welcome! Please follow up either here or on the Discussion page
 on the wiki.

IMHO the right answer is ISO8601:

http://en.wikipedia.org/wiki/ISO_8601

It can be as precise as we need, from a year only, down to a fraction of a
second.

My suggestion would be to use it as follows:

2010 (Year only)
2010-11 (Year/month)
2010-11-11 (Year/month/day)
2010-11-11T08 (Year/month/day/hour)
2010-11-11T08:57 (Year/month/day/hour/minute)

The key points when specifying the use of ISO8601 would be to use the
human-readable form (with dashes for date separators, and colons for time
separators, and T between date and time), to include leading zeroes for
date or time parts 10, and to stipulate that the time is the local time
in the region occupied by the node, way or area.

Best wishes,

Andrew


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Re: [Tagging] landuse for arboretum

2010-11-10 Thread John Smith
On 11 November 2010 08:27, Craig Wallace craig...@fastmail.fm wrote:
 Wouldn't it be covered by leisure=garden? ie Place where flowers and other
 plants are grown in a decorative and structured manner or for scientific
 purposes.
 Its just it specifically focuses on trees, as opposed to flowers or other
 plants.

That seems wrong, they aren't for leisure so much as a preserve to
make sure species of trees will survive at least in one place...

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Re: [Tagging] landuse for arboretum

2010-11-10 Thread Nathan Edgars II
On Wed, Nov 10, 2010 at 7:28 PM, John Smith deltafoxtrot...@gmail.com wrote:
 On 11 November 2010 08:27, Craig Wallace craig...@fastmail.fm wrote:
 Wouldn't it be covered by leisure=garden? ie Place where flowers and other
 plants are grown in a decorative and structured manner or for scientific
 purposes.
 Its just it specifically focuses on trees, as opposed to flowers or other
 plants.

 That seems wrong, they aren't for leisure so much as a preserve to
 make sure species of trees will survive at least in one place...

landuse=conservation?

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Re: [Tagging] landuse for arboretum

2010-11-10 Thread Richard Welty

On 11/10/10 7:28 PM, John Smith wrote:

On 11 November 2010 08:27, Craig Wallacecraig...@fastmail.fm  wrote:

Wouldn't it be covered by leisure=garden? ie Place where flowers and other
plants are grown in a decorative and structured manner or for scientific
purposes.
Its just it specifically focuses on trees, as opposed to flowers or other
plants.

That seems wrong, they aren't for leisure so much as a preserve to
make sure species of trees will survive at least in one place...

arboretums  can be for conservation, for education and for research.

wikipedia articles are not always helpful, but the article on arboretums
is pretty decent:

http://en.wikipedia.org/wiki/Arboretum

perhaps:

landuse=botanical_garden
collection=arboretum|fruticetum|viticetum|pinetum|...

the distinction from leisure=garden would be that botanical_gardens
are more oriented towards scientific/educational usage rather than
leisure.

richard


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Re: [Tagging] landuse for arboretum

2010-11-10 Thread John Smith
On 11 November 2010 12:18, Nathan Edgars II nerou...@gmail.com wrote:
 I'd prefer keeping landuse values at a minimum, and using subtags
 where necessary. For example landuse=residential something=apartments,
 not landuse=apartments. Would landuse=conservation work for an
 arboretum?

+1

landuse=conservation
conservation=botanical

or something to that effect...

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