Hi Ian, On Sun, Mar 27, 2011 at 10:54 PM, Ian Haylock <[email protected]> wrote: >> 4. When you moved the QC-Rizal boundary to Marikina River >> (which I'm >> not sure is really correct) > > Well it seemed more logical, as lots of the boundaries seem to follow rivers > and streams.
While it seems logical, it's not always the case. Many boundaries don't follow any natural feature. Quezon City's map <http://www.quezoncity.gov.ph/index.php?option=com_content&view=article&id=141&Itemid=16> suggests that the boundary in that area is a straight line and not the Marikina River. This map of neighboring San Mateo ,http://www.batangsanmateo.com/map/index.htm> also suggests that the boundary is a straight line. >> I've fixed that, though research is needed to correctly determine if the >> boundary is indeed on the Marikina River. > > Where can one find such info, without visiting the local town hall ? Sometimes the local government unit's website have maps or a geographical description where you can get the info to draw the boundaries. There's also gadm.org, but the boundaries there for the Philippines are pretty bad (and are licensed non-commercial so we couldn't use them anyway). >> 5. Davao City is not part of Davao del Sur (though they're >> often >> grouped together). > >> 6. Zamboanga City is not part of Zamboanga Sibugay. >> > > Feel free to create a boundary around the cities to separate them. Someone > already did this with Tagatay City. > >> Regarding #5 and #6 above, I think that highly-urbanized >> cities (like >> Baguio) and independent cities (like Cotabato) should be >> considered >> outside the province admin boundary relations since these >> cities are >> completely independent of any province administratively. >> But until we >> have accurate city/municipal boundaries, I guess the >> current situation can exist. > > Hey, the boundary around Tagatay City is just a square box, not exactly what > I'd call accurate, but hey it's a wiki, someone can improve it later. Tagaytay's boundaries is in reality pretty rectangular and what's in OSM is probably accurate to within a kilometer. :-) But Tagaytay is neither highly urbanized nor independent so they're properly within Cavite's boundaries. >> BTW, it seems that some of your admin relation edits is >> just >> rearrangement of the ways so that they're in order? While >> this is >> nice, it's not necessary since all the renderers that I >> know of can >> handle out-of-order ways. > > Ah, but as I'm not a computer I can't tell if the boundary is complete or > broken unless they are arranged in order. So once this is done, I thought I > might as well upload the boundary again. It also gives me a record as to > which boundaries I've already edited, as it gets quite confusing in Manila. We could use Keep Right to monitor incomplete and broken boundaries since it can detect them. Eugene _______________________________________________ talk-ph mailing list [email protected] http://lists.openstreetmap.org/listinfo/talk-ph
