@maning, I looked at your mangroves at Lian ... the coastline is
actually traversing the mangrove area, half on land and half on ocean,
but it is still being rendered as whole land. <br><br>I believe it is
because you used the landuse:forest tag while I used natural:wetland
tag as suggested by OSM for mangrove areas. <br>
<br>The natural:wetland does not render as a green patch when it is on the water side of the coastline.<br><br>shall I use landuse:forest instead of natural:wetland instead?<br><br><div class="gmail_quote">On Fri, Jul 9, 2010 at 10:09 PM, <span dir="ltr"><<a href="mailto:jeroen@bohol.ph">jeroen@bohol.ph</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"><br>
Can't find Mangrove here as a separate category. I believe normally coastlines are high-high waterlines. See this picture on my (site <a href="http://www.bohol.ph/picture206.html" target="_blank">http://www.bohol.ph/picture206.html</a>) for looks off a mangrove (near Loay, Bohol); this land will submerge a high tide. Picture can be used under CC-BY or CC-BY-SA if needed.<br>
<br>
Jeroen.<div><div></div><div class="h5"><br>
<br>
<br>
Quoting maning sambale <<a href="mailto:emmanuel.sambale@gmail.com" target="_blank">emmanuel.sambale@gmail.com</a>>:<br>
<br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
A proposed water_cover tagging:<br>
<a href="http://wiki.openstreetmap.org/wiki/Proposed_features/Water_cover" target="_blank">http://wiki.openstreetmap.org/wiki/Proposed_features/Water_cover</a><br>
<br>
On Fri, Jul 9, 2010 at 3:39 PM, maning sambale<br>
<<a href="mailto:emmanuel.sambale@gmail.com" target="_blank">emmanuel.sambale@gmail.com</a>> wrote:<br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
On Fri, Jul 9, 2010 at 11:15 AM, Ed Garcia <<a href="mailto:eppgarcia@gmail.com" target="_blank">eppgarcia@gmail.com</a>> wrote:<br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
Can I have your opinion on this, guys? it is about coastal mangrove areas.<br>
It is suggested, and I agree, to map mangrove areas as inland (inside the<br>
coastline). But I encountered the mangrove areas at Alburquerque, Bohol and<br>
the mangroves (seen on wms Lansat) are currently lying on the ocean side.<br>
The current coastline is along the actual edge of what is definitely the<br>
actual land. I have personally seen the coast myself when I was in the<br>
Albuquerque area.<br>
<br>
<a href="http://www.openstreetmap.org/?lat=9.6127&lon=123.954&zoom=14&layers=B000FTF" target="_blank">http://www.openstreetmap.org/?lat=9.6127&lon=123.954&zoom=14&layers=B000FTF</a><br>
<br>
Question: Shall I move the coastline seaward so that the mangroves would<br>
apear inland?<br>
</blockquote>
<br>
IMO, no. Some mangroves in Lian, Batangas are more on the sea side.<br>
Hence, I didn't move the the coastline.<br>
<br>
<a href="http://osm.org/go/4yfxfytF5-" target="_blank">http://osm.org/go/4yfxfytF5-</a><br>
<br>
I've walked around these mangroves stands for two full days.<br>
<br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
This would in a way state that mangroves (or tidelands) are<br>
land and thereby also state that coastlines for tidal lands and flats are to<br>
be drawn using the exposed areas during the lowest low tide (not just the<br>
mean tide as this will "cut" some mangrove areas in half). Classic case for<br>
tidal flats are in Calatagan, where the low tide exposes an additional 150+m<br>
of "land".<br>
</blockquote>
<br>
I have this similar case in Talim Bay (Lian, Batangas). During low<br>
tides, the inter-tidal flats (locally known as tangkulan) are in<br>
hundreds of meters from the mean coast.<br>
<br>
<a href="http://farm2.static.flickr.com/1440/541589816_bf5bf812a2_b.jpg" target="_blank">http://farm2.static.flickr.com/1440/541589816_bf5bf812a2_b.jpg</a><br>
<br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
Also, the above considers that some islands become "land" only on low tides.<br>
</blockquote>
The "if in doubt, map as land" mantra applies only if you're<br>
unfamiliar with the area. For everything else, it's your call<br>
provided you have verified on the ground.<br>
<br>
I think we should map inter-tidal zones as lines (this needs to be defined more)<br>
<br>
<br>
<br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<br>
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