[talk-ph] Correcting Philippine coastlines

Sun Sep 21 11:07:30 BST 2008

Mike,

>  The objective is to import island names as nodes, e.g. place=island, name=xyz - i.e. just nodes not coastline ways with island name attached.  
Yes just island and islet node names for now.

> And is there any extra info or edits in gnet_islands_ph.zip ? 
Not much, I suggest you download directly from GNS serevr, the zip file
is about a year old.

> I know for example that the GNS coordinates are very course so names for small islands (less than 2km across) may not be accurately placed.
We can edi them further.

Thanks again, please join us here @ talk-ph

cheers,
maning


> Mike
> 
> 
> 
> At 10:30 AM 19/09/2008, maning sambale wrote:
> >Content-Transfer-Encoding: 7bit
> >Content-Disposition: inline
> >
> >On Fri, Sep 19, 2008 at 3:26 PM, Ian Haylock <haylocki at yahoo.co.uk> wrote:
> >> Hi,
> >>
> >> I think the coastline from Manila to the part of Cavite should be ok, as
> >> I've been editing this area. I noticed last year that Boracay had been done,
> >> as well as some of the Island to the south of Boracay.
> >>
> >> Spotting coastline that needs updating should be fairly easy by examining
> >> the area using the slippy map, srtm coastlines usually have the horrible
> >> step like appearance.
> >>
> >> It would be nice to add the names to the islands as they are updated, but as
> >> I don't know what they are, do you know of a source where I can find out ?
> >
> >I'm sending you a zip file containing all the island/islet names for
> >the Philippines from GNS
> >(http://earth-info.nga.mil/gns/html/index.html).  Data is in public
> >domain, hence, no licensing issues.  I converted the data to shapefile
> >years ago.  This is the same data source where Mike Collinson (cc'd
> >here) made the data Municipalities/Cities name import.
> >
> >Mike can you help us out again in importing island names this time?
> >
> >> Now I remember why I hated fixing the coastline before, you spend 5 minutes
> >> editing, and 20 minutes waiting for the upload to finish.
> >
> >OSM database seems to be better now, don't you think?
> >
> >
> >And the Philippines even getting better :)
> >
> >cheers,
> >maning
> >> Cheers, Ian
> >>
> >> --- On Fri, 19/9/08, maning sambale <emmanuel.sambale at gmail.com> wrote:
> >>
> >> From: maning sambale <emmanuel.sambale at gmail.com>
> >> Subject: Re: [talk-ph] Correcting Philippine coastlines
> >> To: talk-ph at openstreetmap.org
> >> Date: Friday, 19 September, 2008, 7:32 AM
> >>
> >>>
> >>> The script coast_josm.pl produces the same output, as the code used on the
> >>> web page is based on the coast_josm.pl script.
> >>>
> >>> I think using either of the above methods would be a lot quicker than
> >>> tracing all the coastline by hand, and produce a pretty accurate
> >> coastline.
> >>>
> >>> I've uploaded the data for the island, here's a link to the area :
> >>>
> >>>
> >> http://www.informationfreeway.org/?lat=19.318031414701732&lon=121.45548518653908&zoom=12&layers=B000F000F
> >>
> >> Calayan Island! Home of the endemic newly discovered bird Calayan
> >> Rail.  Yeah that looks nice.  Please update as many islands as you
> >> can.  We just need to be careful with
> >>  uploading large areas.  We might
> >> break into other contributor's work.  AFAIK, metro manila coast has
> >> been edited already from Yahoo!, so the PGS would be useless there, as
> >> well as in Davao.
> >>
> >> cheers,
> >> maning
> >>
> >>> I'll delete the original coastline, and fix the new one when
> >> you've had a
> >>> look.
> >>>
> >>> Cheers, Ian
> >>>
> >>> --- On Fri, 19/9/08, maning sambale <emmanuel.sambale at gmail.com>
> >> wrote:
> >>>
> >>> From: maning sambale <emmanuel.sambale at gmail.com>
> >>> Subject: Re: [talk-ph] Correcting Philippine coastlines
> >>> To: talk-ph at openstreetmap.org
> >>> Date: Friday, 19 September, 2008, 2:09 AM
> >>>
> >>> Thanks for the lakewalker tip!  I didn't get it to work before, but
> >>> now it's working quite fine for the lakes I'm currently processing
> >>>
> >>> On Thu, Sep 18, 2008 at 9:19 PM, Ian Haylock
> >>>  <haylocki at yahoo.co.uk>
> >>> wrote:
> >>>> Hi,
> >>  also just remembered when I was fixing the coastlines last year,
> >> some
> >>> of
> >>>> it was much better quality than the srtm coastline as it used the
> >> Almien
> >>>> Coastlines script.
> >>>>
> >>>>
> >>>
> >> http://wiki.openstreetmap.org/index.php/Almien_coastlines_(PGS)#Identifying_coastline_data
> >>>>
> >>>> I was hoping someone would finish uploading all the coastline.
> >> Don't
> >>> know if
> >>>> the reason it hasn't been, is because the data doesn't cover
> >> the
> >>> whole of
> >>>> the Philippines .
> >>> It actually has complete coverage for the Philippines, give a few
> >>> incomplete segments.  If we want to continue importing them, we need
> >>> to inventory which areas of the SRTM coastline are already edited in
> >>> detail.  From experience, the PGS coastline has a couple of errors and
> >>> manual edits are still needed.  The source of the PGS coastline by the
> >>> way
> >>  is also Landsat images.
> >>>
> >>> Feel free to
> >>>  test import in some area and lets see how it goes in
> >>> terms of efficient workflow and effort.
> >>>
> >>>
> >>> cheers,
> >>> maning
> >>>
> >>>
> >>>> Cheers, Ian
> >>>>
> >>>> --- On Thu, 18/9/08, maning sambale <emmanuel.sambale at gmail.com>
> >>> wrote:
> >>>>
> >>>> From: maning sambale <emmanuel.sambale at gmail.com>
> >>>> Subject: [talk-ph] Correcting Philippine coastlines
> >>>> To: talk-ph at openstreetmap.org
> >>>> Date: Thursday, 18 September, 2008, 2:05 AM
> >>>>
> >>>> Hi,
> >>>>
> >>>> I am documenting my progress in editing island coastlines.  Please add
> >>>> more in the list.
> >>>> We have more then  7,100 to correct :)
> >>>>
> >>>>
> >>>
> >> http://wiki.openstreetmap.org/index.php/OSM_Philippines_Data_Import#Coastline_Corrections
> >>>>
> >>>>
> >>>>
> >>  cheers,
> >>>> maning
> >>>> --
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> >| __.-._ |"Ohhh. Great warrior. Wars not make one great." -Yoda |
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> >Content-Type: application/zip; name=gnet_islands_ph.zip
> >X-Attachment-Id: f_flajpt8b0
> >Content-Disposition: attachment; filename=gnet_islands_ph.zip
> >
> 
>