[talk-ph] best practice for village admin_centre relations

maning sambale emmanuel.sambale at gmail.com
Mon Jul 6 03:29:39 UTC 2015


Thanks for all the advise.  I think I've fixed all of Markina's
village/brgy admin_centres
http://overpass-turbo.eu/s/agI

On Thu, Jul 2, 2015 at 3:31 PM, Rally de Leon <ralleon at gmail.com> wrote:
> Erwin,
> Confused: I thought all along that the subject about the
> admin-polygon-relation's center (whatever that means). :-) That normally, in
> the absence of a member 'admin_centre' node in the relation, the name-TEXT
> of that administrative polygon is rendered in its geometric center.
>
> BUT, assigning a node as the admin_centre of an administrative_relation,
> will for some reason render the TEXT value at the assigned 'location' of
> said node. Which in most cases happens to be the  place_name. Isn't that the
> idea of Maning's question? hmmmm
>
> What's the difference if there's any? can you explain? (with example please
> - yung pang elementary) for the benefit of the likes of me who are too lazy
> to read the manual, hehe
>
> Rally
>
> On Thu, Jul 2, 2015 at 2:46 PM, Erwin Olario <govvin at gmail.com> wrote:
>>
>>
>> Rally, Maning is asking about the administrative centres, and that would
>> mean government authorities in charge of administration. They are not meant
>> to represent the [geographic] "center of the village" which isn't something
>> we normally map.
>>
>> As for place=village nodes, and like I wrote earlier, I put them in the
>> commons (e.g. plaza, local park, etc.).
>>
>> Erwin
>>
>>
>>
>> Erwin Olario
>> - - - - - - - - - - - - - - - - - - -
>> » email: erwin at ngnuITy.net | govvin at gmail.com
>> » mobile: (PHL): +63 908 817 2013
>> » OpenPGP key: 3A93D56B | 5D42 7CCB 8827 9046 1ACB 0B94 63A4 81CE 3A93
>> D56B
>>
>> On Thu, Jul 2, 2015 at 2:35 PM, Rally de Leon <ralleon at gmail.com> wrote:
>>>
>>> Question:
>>> - What's the best practice for adding admin_centre nodes to the village
>>> boundary relation? Should it be the barangay hall (amenity=townhall)
>>> or the place=village node?
>>>
>>> ------------
>>> For place nodes, a good practice IMHO is putting said node (eg.
>>> place=village)
>>> somewhere NEAR but NOT ON an "object or group of objects" which
>>> represents the center of the village, typically any of the following:
>>>   -barangay hall
>>>   -village plaza (eg. where there's a multipurpose hall or basketball
>>> court)
>>>   -the center of traditional grid-street (the oldest populated area of
>>> the place)
>>>
>>> My interpretation of "somewhere near" is around 100-150 meters away;
>>> on a not-so-important space (eg. a vacant area or generic community)
>>> in the vicinity, where there are no other place nodes, or important
>>> landmarks
>>> like a park or institution.
>>>
>>> 1st Reason:
>>> The 'place node' is represented by a TEXT on the map.
>>> -a rendered TEXT always cover the lines and polygons under it. Thus,
>>> putting a place_node very close to another object (eg. important
>>> building),
>>> will essentially make that building disappear (information visibility is
>>> not optimized).
>>> Said buildings  will only appear when you zoom-in on a digital map.
>>> But you cannot zoom-in on a paper map (2-D). So I thought, the best
>>> practice
>>> is to move it just enough not to cover important objects (part of the
>>> art).
>>> (until such time we have an algorithm to do that automatically)
>>>
>>> 2nd Reason:
>>> Putting a place node inside a polygon with a large footprint the size of
>>> a neighborhood, like an institutional_polygon or a park; will not just
>>> potentially cover the 'name' of institution or park, but add unintended
>>> confusion or misrepresentation of the polygon.
>>> eg. If you put a place_node of Ermita inside Rizal Park's valencia
>>> circle,
>>> a tourist who wants to go to the heart of Ermita, ends up in Luneta
>>> (which is technically Ermita) - but was not probably his/her intention
>>>
>>> 3rd Reason:
>>> There are some LGU's (municipal and barangays) which relocated (or
>>> isolated)
>>> their new townhalls away from the village or town centers.
>>>
>>> Putting a place_node on top or near an isolated townhall (away from
>>> populated center)
>>> is not always representative of the general location of the village or
>>> the town.
>>> (this is a dilemna for Mamasapano, where townhall is located near the
>>> boundary)
>>>
>>> -----------------------
>>> I'm voting +1 for:
>>> place=village as admin_centre, provided it's located NEAR not ON the
>>> object (amenity=townhall)
>>>
>>> Cheer,
>>> Rally
>>>
>>>
>>>
>>>
>>> _______________________________________________
>>> talk-ph mailing list
>>> talk-ph at openstreetmap.org
>>> https://lists.openstreetmap.org/listinfo/talk-ph
>>>
>>
>



-- 
cheers,
maning
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"Freedom is still the most radical idea of all" -N.Branden
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