A proposed water_cover tagging: http://wiki.openstreetmap.org/wiki/Proposed_features/Water_cover
On Fri, Jul 9, 2010 at 3:39 PM, maning sambale <emmanuel.samb...@gmail.com> wrote: > On Fri, Jul 9, 2010 at 11:15 AM, Ed Garcia <eppgar...@gmail.com> wrote: >> Can I have your opinion on this, guys? it is about coastal mangrove areas. >> It is suggested, and I agree, to map mangrove areas as inland (inside the >> coastline). But I encountered the mangrove areas at Alburquerque, Bohol and >> the mangroves (seen on wms Lansat) are currently lying on the ocean side. >> The current coastline is along the actual edge of what is definitely the >> actual land. I have personally seen the coast myself when I was in the >> Albuquerque area. >> >> http://www.openstreetmap.org/?lat=9.6127&lon=123.954&zoom=14&layers=B000FTF >> >> Question: Shall I move the coastline seaward so that the mangroves would >> apear inland? > > IMO, no. Some mangroves in Lian, Batangas are more on the sea side. > Hence, I didn't move the the coastline. > > http://osm.org/go/4yfxfytF5- > > I've walked around these mangroves stands for two full days. > >> This would in a way state that mangroves (or tidelands) are >> land and thereby also state that coastlines for tidal lands and flats are to >> be drawn using the exposed areas during the lowest low tide (not just the >> mean tide as this will "cut" some mangrove areas in half). Classic case for >> tidal flats are in Calatagan, where the low tide exposes an additional 150+m >> of "land". > > I have this similar case in Talim Bay (Lian, Batangas). During low > tides, the inter-tidal flats (locally known as tangkulan) are in > hundreds of meters from the mean coast. > > http://farm2.static.flickr.com/1440/541589816_bf5bf812a2_b.jpg > >> Also, the above considers that some islands become "land" only on low tides. > The "if in doubt, map as land" mantra applies only if you're > unfamiliar with the area. For everything else, it's your call > provided you have verified on the ground. > > I think we should map inter-tidal zones as lines (this needs to be defined > more) > > > >> >> >> >> >> -- >> website administrator: >> - www.waypoints.ph >> - reeflife.eppgarcia.com >> >> PADI Divemaster #491048 >> >> _______________________________________________ >> talk-ph mailing list >> talk-ph@openstreetmap.org >> http://lists.openstreetmap.org/listinfo/talk-ph >> >> > > > > -- > cheers, > maning > ------------------------------------------------------ > "Freedom is still the most radical idea of all" -N.Branden > wiki: http://esambale.wikispaces.com/ > blog: http://epsg4253.wordpress.com/ > ------------------------------------------------------ > -- cheers, maning ------------------------------------------------------ "Freedom is still the most radical idea of all" -N.Branden wiki: http://esambale.wikispaces.com/ blog: http://epsg4253.wordpress.com/ ------------------------------------------------------ _______________________________________________ talk-ph mailing list talk-ph@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-ph
