[talk-ph] better ways to coordinate coastline mapping?

Eugene Alvin Villar seav80 at gmail.com
Mon Jul 5 18:04:50 BST 2010


HI guys,

Here's an *initial* webmap showing where the jagged coastlines are as of
July 3:
http://forge.codedgraphic.com/osm/sawtooth_coastlines/

The larger the circle, the more jagged steps there are to clean up.

Sorry, there's no link going to Potlatch or JOSM/Merkaartor. I'll add that
up when I learn more of OpenLayers. But for now, this will have to do.

Enjoy!

Eugene

On Mon, Jul 5, 2010 at 9:30 AM, maning sambale
<emmanuel.sambale at gmail.com>wrote:

> We missed the June target to to finish the 10 largest islands.
>
> http://wiki.openstreetmap.org/wiki/WikiProject_Philippines/Coastline_Corrections#Priorities
>
> That's OK.  All we need is to finish mainland Mindanao and we can set
> our radar to the next 20 on the list.
> We are also working on some webmap to visualize the "sawtooth".  More
> on that when its ready.
>
>
> On Sun, Jul 4, 2010 at 5:48 PM, maning sambale
> <emmanuel.sambale at gmail.com> wrote:
> > I can load it in my public dropbox.
> >
> > On Sun, Jul 4, 2010 at 2:23 PM, Eugene Alvin Villar <seav80 at gmail.com>
> wrote:
> >> Hi guys,
> >>
> >> Once we are done with the large islands, the next step is to do the
> smaller
> >> islands. Ian Haylock has helpfully provided the PGS coastlines[1] for
> the
> >> Philippines last year[2] which he edited to combine ways. PGS itself was
> >> automatically generated by a software by analyzing the Landsat imagery.
> >> Unfortunately, Ian's file was hosted on a free file server and has now
> >> expired but I think several people on the mailing list managed to
> download
> >> it.
> >>
> >> I tried opening the file last year in Merkaartor but my old laptop
> couldn't
> >> handle the data. Now that I have a 4GB-RAM laptop, loading the data into
> >> Merkaartor is very manageable. Using the PGS coastlines is much, much
> easier
> >> than tracing Landsat by hand. I tried this with Homonhon Island and
> editing
> >> is way faster than actually uploading it[3]. Hehehe. What I did was to
> >> delete the SRTM-derived coastline[4] and replace it with the PGS
> >> coastline[5].
> >>
> >> I think uploading the PGS coastlines is better for the smaller islands.
> I'll
> >> see what we can do to have the PGS coastlines (55MB) uploaded somewhere.
> >>
> >> [1] http://wiki.openstreetmap.org/wiki/Prototype_Global_Shoreline
> >> [2]
> http://lists.openstreetmap.org/pipermail/talk-ph/2009-June/001071.html
> >> [3] http://www.openstreetmap.org/browse/changeset/5129873
> >> [4] http://www.openstreetmap.org/browse/way/4327906
> >> [5] http://www.openstreetmap.org/browse/way/65592780
> >>
> >> Eugene
> >>
> >>
> >> On Thu, Jun 17, 2010 at 8:20 PM, maning sambale <
> emmanuel.sambale at gmail.com>
> >> wrote:
> >>>
> >>> UPDATE. Only two islands from the top ten need some coasty coastline
> love.
> >>>
> >>>
> http://wiki.openstreetmap.org/wiki/WikiProject_Philippines/Coastline_Corrections
> >>>
> >>> Anyone working on Negros and Mainland Mindanao?
> >>>
> >>
> >>
> >
> >
> >
> > --
> > 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 at openstreetmap.org
> http://lists.openstreetmap.org/listinfo/talk-ph
>



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