Re: [Tagging] Housenumber interpolation with regularlyskippednumbers

2009-10-15 Thread Randy Thomson
Martin Koppenhoefer wrote:

 actually I think that instead of discussing interpolation with
 regularlyskipped numbers you could map explicitly the nodes of the
 real numbers, thus getting a high-precision map instead of this
 interpolation-crab, that is much less useful then an actual accurate
 position ;-)
 
 just my 2 cents.
 
 cheers,
 Martin

Sounds good Martin. I have about 3000-5000 houses to tag, I'll tag the
beginning and ending house addresses, on each street, if you'll tag the
15-20 individual houses in between. They're in the satellite images, so
it shouldn't be a problem.

Just kidding, but hopefully you'll get the point that it's a pretty
labor intensive job, and interpolation, with an appropriate skip factor
would make the job a lot more likely to eventually reach completion.

In the area I'm working, most of the lots on these streets have fairly
uniform width at the street, so interpolation will rarely be in error
by a full physical street address.

Some of this has been said before, but unfortunately this subject got
hijacked to something about comparing Tiger vs. Karlsruhe schemae and
you have to go back a few days to find the discussion that truly
relates to the subject of the thread.

Based on Richard Bullock's suggestion, I have added the numeric
increment to the definition for the tag addr:interpolation=*, and
additional information under Using interpolation on the Key:addr wiki
page. I'll start tagging street addresses this way as soon as time
permits.

I noticed that Mapnik already renders the way properly, although there
is no way to verify the increment. OSMARender apparently detects an
invalid interpolation value and renders the end point nodes, but not
the way, at present.
-- 
Randy


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Re: [Tagging] Best practice regarding addr:housenumber and POIs

2009-10-15 Thread Peter Childs
2009/10/15 Markus Lindholm markus.lindh...@gmail.com:
 Hi

 I'm wondering what is best practice regarding tagging addr:housenumber
 and POIs, e.g. amenity=restaurant.
 Let's assume that on Mainstreet 10 there's a restaurant named Thai
 Wok. Should there be one node or two?
 One single node with the tags addr:street, addr:housenumber,
 amenity=restaurant and name=Thai Wok or two nodes, one with the addr:*
 tags and another with the POI tags?

 Regards
 Markus


One, I guess, it keeps it simple and easy to ensure that the all the
data relating to that node are kept together.

However, You could put together n nodes, connect a way between them,
forming an area, and then tag the way. Allowing us to know how far
along the street the restaurant stretches and if it maybe has a back
door onto another street etc etc. (This is nice but not really
necessary).

Peter.

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Re: [Tagging] Housenumber interpolation with regularlyskippednumbers

2009-10-15 Thread Anthony
On Thu, Oct 15, 2009 at 2:50 AM, Randy Thomson rwtnospam-...@yahoo.com wrote:
 Sounds good Martin. I have about 3000-5000 houses to tag, I'll tag the
 beginning and ending house addresses, on each street, if you'll tag the
 15-20 individual houses in between. They're in the satellite images, so
 it shouldn't be a problem.

I'll give it a try.  Send me a list of the ways.  I'll set up a script
to automatically create the nodes, and I'll just move them into place
if they're not lined up over the houses.

Or if you want, I'll give you the script.

 Just kidding, but hopefully you'll get the point that it's a pretty
 labor intensive job, and interpolation, with an appropriate skip factor
 would make the job a lot more likely to eventually reach completion.

Or even easier and more likely to reach completion without the skip factor.

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Re: [Tagging] tagging the multipolygon model (was landuse and military)

2009-10-15 Thread Martin Koppenhoefer
2009/10/14 sly (sylvain letuffe) li...@letuffe.org:

 In the holes continuity, it as been proposed that an area representing
 something inside another area would still be part of a multipolygon relation
 but with it's own tags.

no, this is not the case. Multipolygon says: the inner part is NOT
part of the outer polygon. If it is part just don't put a
multipolygon-relation (standard-case).

 this sounds great, requesting the surface of the big area is strait forward,
 rendering become easy (no which one is over which one), such a puzzle makes
 it easy to find problems, etc.

no, this is a case to be solved continuously - usually if one polygon
is entirely inside another the smaller one should be rendered above:
this should be generally solved by the renderers. Also, it can be
better in some cases not to use a solid fill but just an outline that
is rendered above the fills.

 But, this becomes harder and harder for the mapper. A big forest containing
 thousands lakes ? a landuse=residential containing park, cimetary, etc. ?
 I fear not every one is gone a make the effort.
 And after all, is it at all needed ?

let the mappers decide.

 In the area inside area case (not the partially overlapping areas case)
 We can resonably imagine that if a mapper has added such an area inside
 another, then either :
 - they can be both (a military area and a forest)
 - they can't be both (a lake and a forest)

well, even in the case lake inside a forest I'm not sure, if the
forest stops where there is the lake. Probably you can consider the
lake also part of the forest (when it's small), or to give a different
example: elementary school inside a residential area. Usually those
would be considered to be part of the residential area.

 Maybe if we just define/explain/(do our best not to create same key
 incompatibility, juste like this boundary=military propose to replace the
 ambiguous landuse=military for some cases)
 Same for natural, then what we've left ?
amenity? Finally almost all tags can become areas.

 A lake inside a forest, is not a forest
sure?

 A cimetary inside a residential is not a residential
+1

cheers,
Martin

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Re: [Tagging] tagging the multipolygon model (was landuse and military)

2009-10-15 Thread Dave F.
Martin Koppenhoefer wrote:
 well, even in the case lake inside a forest I'm not sure, if the
 forest stops where there is the lake. Probably you can consider the
 lake also part of the forest (when it's small), or to give a different
 example: elementary school inside a residential area. Usually those
 would be considered to be part of the residential area.
   
I disagree. A school site with it's buildings, playgrounds, sports 
fields etc can add up to a big area.
Someone may want to do some calculations  based on these areas. They 
should be as accurate as possible.
I'm in the process of editing the existing residential areas in my town 
to go around these. It certainly makes a difference.
   
 Maybe if we just define/explain/(do our best not to create same key
 incompatibility, juste like this boundary=military propose to replace the
 ambiguous landuse=military for some cases)
 Same for natural, then what we've left ?
 
 amenity? Finally almost all tags can become areas.

   
 A lake inside a forest, is not a forest
 
 sure?
   
Yes
   
 A cimetary inside a residential is not a residential
 
 +1
   
Then how can you include schools?

Cheers
Dave F.

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Re: [Tagging] tagging the multipolygon model (was landuse and military)

2009-10-15 Thread sly (sylvain letuffe)
On jeudi 15 octobre 2009, Martin Koppenhoefer wrote:
 no, this is not the case. Multipolygon says: the inner part is NOT
 part of the outer polygon. 

I didn't say that ;-) I said : 
an area representing something inside another area would still be part of a 
multipolygon relation (I assumed people discussing this with me are familiar 
with the (advanced) multipolygon proposal and have assumed I was talking 
about an inner role in this case.)

 let the mappers decide.

So we do agree. My point was to stop or not to stop harrassing mappers that do 
not include inner polygons.
and/or not updating the wiki acordingly, giving the choice, mentionning that 
solution. We could let decide, but give clues about what's for what.


-- 
sly 
Sylvain Letuffe li...@letuffe.org
qui suis-je : http://slyserv.dyndns.org




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Re: [Tagging] tagging the multipolygon model (was landuse and military)

2009-10-15 Thread sly (sylvain letuffe)
On jeudi 15 octobre 2009, Martin Koppenhoefer wrote:
 For the lake in the forest: do you agree that someone would say: the
 lake (pond) is in the forest? Like a way in the forest, which doesn't
 have trees growing on it, but still is in the forest. It is not
 excluded.

That's a human language matter. I don't think it's good to stick a data model 
to verbs and words.

Between them, there should be interpretation, understanding, and questions 
answering. That is to say, programs. 

The data model should be able to answer maximum human questions (with 
programs)

Case of the lake in the forest, you could imagine multi-question to answer :
- what surface is this forest ?
Suppose I'm a wood lumber producer, I've got statitics about mean trees per 
square km. I'll surely want to exclude the lake's surface, as well as any 
road's surface going thru.
- is the lake in a forest ?
I suppose here I want to know if I can reach the lake by transporting my boat 
through grass fields.
...



-- 
sly 
Sylvain Letuffe li...@letuffe.org
qui suis-je : http://slyserv.dyndns.org




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Re: [Tagging] tagging the multipolygon model (was landuse and military)

2009-10-15 Thread Anthony
On Thu, Oct 15, 2009 at 12:27 PM, Dave F. dave...@madasafish.com wrote:
 Anthony wrote:

 What happens when there's a section of forest which people are using
 as their residence?
 No matter what the size, I see these as mutually exclusive. In other
 words they can't both occur in the same place.

I fully agree with you - as I said, I think landuse=forest should be
reserved for things like tree farms, where the *use* of the land is
growing trees.

 Whether they get mapped like that is up to the mapper depending
 time/fussiness.
 If there was an easyway to put holes in areas it would encourage
 mappers to do it.

add a fixme=create_hole tag and a bot could go around fixing them...

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