[talk-ph] Fwd: [OSM-talk] keepright! goes global

Tue Jul 21 06:42:16 BST 2009

@marloue: we'll just have to recheck the roads, maning is probably
right we might have missed something out.

On Tue, Jul 21, 2009 at 1:36 PM, maning
sambale<emmanuel.sambale at gmail.com> wrote:
> The plane route shoud connect to a road, that's how I understand it.
> Same with ferry routes
>
> On 7/21/09, Marloue Pidor <murlwe at mail2engineer.com> wrote:
>> Ohh, but I added a flight route from Davao to Manila. Check the data,
>> its there but I don't know why it did not appear. So, Technically Davao
>> is connected to Manila by plane. I will try to add ferry route to
>> Manila. Its a very long route.
>>
>>
>> murlwe
>>
>> <-----Original Message----->
>>>From: Eugene Alvin Villar [seav80 at gmail.com]
>>>Sent: 7/21/2009 12:10:35 PM
>>>To: totor_osm at yahoo.com
>>>Cc: talk-ph at openstreetmap.org
>>>Subject: Re: [talk-ph] Fwd: [OSM-talk] keepright! goes global
>>>
>>>Hi guys,
>>>
>>>I asked the tool's maintainer how the floating island error is
>> determined.
>>>Here's his answer:
>>>http://lists.openstreetmap.org/pipermail/talk/2009-July/038800.html
>>>
>>>I've reprinted it here below for convenience:
>>>
>>>
>>>The motto of this check is "you can go everywhere from everywhere".
>>>
>>>There is a set of starting points (highways in the center of big cities
>> that are
>>>well connected to many other streets) I picked randomly. The check
>> finds ways
>>>that are connected to these ways and thus finds a (bigger) set of ways.
>> This
>>>procedure is repeated until no more ways are found. Any way that was
>> not found
>>>is a floating island.
>>>
>>>There are 30 starting points all over the world, one of them in Manila.
>>>
>>>Please note that the check will follow any highway and ferries are
>> included, so
>>>it _should_ find islands as long as there's a ferry connected to a
>> highway on
>>>the island.
>>>
>>>So it seems that everything not connected to the main streets of Metro
>> Manila is
>>>considered as a "floating island". Mindoro is covered since there is a
>> ferry
>>>route from Batangas to Puerto Galera. I think if we can at least sketch
>> out the
>>>Ro-Ro routes, we can cover most of the major island. I will also
>> suggest adding
>>>Cebu and Davao cities as seeds to minimize problems.
>>>
>>>However, this will not cover all the islands (there are about 2,000
>> inhabited
>>>islands out of 7,100+ and not all of them have regular ferry routes
>> [like
>>>Batanes (?) which is served by flights]) so this means that we cannot
>> rely on
>>>keep right to point out all floating island errors. I think a
>> customized QA tool
>>>for the Philippines would be needed.
>>>
>>>I hope this helps! In the meantime, just uncheck this error and ignore
>> it until
>>>we can have a backbone connection for the Philippines and more seeds.
>>>
>>>
>>>Eugene / seav
>>>
>>>
>>>
>>>
>>>On Mon, Jul 20, 2009 at 11:13 PM, Totor Osm <totor_osm at yahoo.com>
>> wrote:
>>>
>>>
>>>I saw some blue arrows indicating 2 roads are close, but not
>> conneected. In Cebu
>>>this is the case near Car-Car in the south, and also in the north of
>> Cebu
>>>Island. Maybe this could be the reason for the "island" warning on
>> other
>>>intersections (Not connected to the world, because of these gaps)?
>>>
>>>I'll try to connect them tomorrow.
>>>
>>>
>>>--- On Mon, 7/20/09, Eugene Alvin Villar <seav80 at gmail.com> wrote:
>>>
>>>> From: Eugene Alvin Villar <seav80 at gmail.com>
>>>
>>>> Subject: Re: [talk-ph] Fwd: [OSM-talk] keepright! goes global
>>>> To: "Totor Osm" <totor_osm at yahoo.com>
>>>> Cc: "Openstreetmap.ph.mailing.list" <talk-ph at openstreetmap.org>
>>>> Date: Monday, July 20, 2009, 2:53 PM
>>>
>>>> Ack!
>>>>
>>>> I've done a quick look around and it seems that the
>>>> general Luzon road network is the only one not riddled with
>>>> these errors!
>>>>
>>>>
>>>> On Mon, Jul 20, 2009 at 10:51 PM,
>>>> Eugene Alvin Villar <seav80 at gmail.com>
>>>> wrote:
>>>>
>>>> Hi Totor,
>>>>
>>>> George also replied asking what these floating island
>>>> errors mean.
>>>>
>>>> As far as I understand it, it means that there is a small
>>>> network of navigable ways that is not connected to the rest
>>>> of the network. It does detect "islands" in Metro
>>>> Manila but I'm quite surprised to find that it seems to
>>>> think that the Cebu road network is one big error! Maybe a
>>>> few ferry routes would fix it?
>>>>
>>>>
>>>>
>>>> I'll ask the creator of keep right. I don't think
>>>> he anticipated archipelagos. Hehehe.
>>>>
>>>> Eugene / seav
>>>>
>>>>
>>>> On Mon, Jul 20, 2009 at 10:43 PM,
>>>> Totor Osm <totor_osm at yahoo.com>
>>>> wrote:
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>> Great,
>>>>
>>>>
>>>>
>>>> but,ehr, could it be that Cebu is just one big floating
>>>> island ???
>>>>
>>>>
>>>>
>>>>
>>>http://keepright.ipax.at/report_map.php?db=osm_XD&zoom=14&lat=10.35578&
>> lon=123.92528&layers=B0T&ch30=1&ch40=1&ch50=1&ch60=1&ch70=1&ch90=1&ch100
>> =1&ch110=1&ch120=1&ch130=1&ch150=1&ch160=1&ch170=1&ch180=1&ch191=1&ch192
>> =1&ch193=1&ch194=1&ch201=1&ch202=1&ch203=1&ch204=1&ch210=1&ch220=1&show_
>> ign=1&show_tmpign=1
>>>>
>>>>
>>>>
>>>>
>>>>
>>>> Whats wrong with the orange arrows? The nodes of the
>>>> intersections look ok to me...
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>> --- On Sun, 7/19/09, Eugene Alvin Villar <seav80 at gmail.com>
>>>> wrote:
>>>>
>>>>
>>>>
>>>> > From: Eugene Alvin Villar <seav80 at gmail.com>
>>>>
>>>> > Subject: [talk-ph] Fwd: [OSM-talk] keepright! goes
>>>> global
>>>>
>>>> > To: "OSM" <talk-ph at openstreetmap.org>
>>>>
>>>> > Date: Sunday, July 19, 2009, 4:21 PM
>>>>
>>>> > Hi guys,
>>>>
>>>> >
>>>>
>>>> > The keepright! QA tool for OSM just went almost
>>>> global.
>>>>
>>>> > Previously this tool was only enabled for Europe. This
>>>> tool
>>>>
>>>> > highlights spatial errors (such as overlapping
>>>> unconnected
>>>>
>>>> > ways that have no layer tags to separate them), and
>>>> tagging
>>>>
>>>> > errors (such as POIs without a name tag).
>>>>
>>>> >
>>>>
>>>> >
>>>>
>>>> > Here's a URL centered at the Makati CBD:
>>>>
>>>> >
>>>>
>>>> >
>>>http://keepright.ipax.at/report_map.php?db=osm_XD&zoom=15&lat=14.55284&
>> lon=121.02068&layers=B0T&ch30=1&ch40=1&ch50=1&ch60=1&ch70=1&ch90=1&ch100
>> =1&ch110=1&ch120=1&ch130=1&ch150=1&ch160=1&ch170=1&ch180=1&ch191=1&ch192
>> =
>>>
>>>=== message truncated ===
>>
>>
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>
>
> --
> 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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