[talk-ph] editing admin boundaries of Marikina

maning sambale emmanuel.sambale at gmail.com
Mon Dec 28 12:28:31 GMT 2009

Finally re-visited Marikina city and barangay boundaries.  Please
check if I made the correct relation tags.
City boundary: http://www.openstreetmap.org/browse/relation/146949
Barangay boundary:

On Thu, May 28, 2009 at 10:24 PM, Eugene Alvin Villar <seav80 at gmail.com> wrote:
> On Thu, May 28, 2009 at 12:09 PM, maning sambale
> <emmanuel.sambale at gmail.com> wrote:
>> > Having the internal boundaries is actually a con. The boundary of
>> > Marikina
>> > is its borders with other entities (like Pasig and Antipolo). The
>> > internal
>> > "boundaries" are more properly boundaries of the barangays, not of
>> > Marikina
>> > itself.
>> Not entirely, IMO
>> A barangay (which I treat as a single polygon unit) is within a
>> municipality (a collection of barangay polygons) which is within a
>> province (a collection municipality polygons) with a few exceptions of
>> course and so on and so forth.
> Ah, now I see where you're coming from.
> I agree that the barangays of Marikina are part of Marikina and that
> Marikina is part of Metro Manila and so on. But we are talking about
> boundaries here (relation type=boundary), i.e., land area perimeters, not
> the land area itself. That's why I think that the internal borders shouldn't
> be counted.
>> > In addition, because these internal boundaries are included in the
>> > relation,
>> > they are being drawn as admin_level=6 (per the relation tag) in Mapnik,
>> This is a rendering problem.
>> > though the presence of area=yes seems to mess things up.
>> I think I removed them in Marikina
>> let's discuss this more.
>> PS/OT:
>> Incidentally, at work, I'm looking at using the NCSB codes for
>> codifying provincial polygons.  Does anybody use this at all?
> I think we can use the NSCB Philippine Standard Geographic Codes to refer to
> the various administrative units. Maybe as ref=* tags? We can also use the
> ISO 3166 codes for int_ref=*.

"Freedom is still the most radical idea of all" -N.Branden
wiki: http://esambale.wikispaces.com/
blog: http://epsg4253.wordpress.com/

More information about the talk-ph mailing list