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

maning sambale emmanuel.sambale at gmail.com
Mon Jul 5 02:30:05 BST 2010


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/
------------------------------------------------------




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